Search is not available for this dataset
query stringlengths 1 13.4k | pos stringlengths 1 61k | neg stringlengths 1 63.9k | query_lang stringclasses 147
values | __index_level_0__ int64 0 3.11M |
|---|---|---|---|---|
Effects of Process Parameters on Structure and Hardness of Cu-SiO_2 Composite Coating Prepared by Ultrasonic Electrodeposition | The Cu-SiO2 composite coating was prepared by ultrasonic electrodeposition,and the effects of ultrasonic power and cathode current density on its structure and hardness were studied.The results show that the structure of the coating is improved first and then deteriorated with the increasing of ultrasonic power(from 0 ... | We demonstrate an effective route for the in-situ chemical synthesis of gold nanoparticles on monolayer modified silicon ::: substrate. The formation of gold nanoparticles is based on the ability of the amino groups of the monolayer to bind ::: AuCl 4 - ions, followed by the reduction of AuCl 4 - to Au 0 with NaBH4. Th... | eng_Latn | 11,700 |
Why [CpW(CO)3]+ reduces H2 to dihydride. | The [CpW(CO)3]+ complex, with three pi acceptor ligands and a positive charge, is shown to have an unexpected reducing ability towards H2 because of a low lying triplet state energy. | The formation of Pt nanowires (NWs) by atomic layer deposition on highly ordered pyrolytic graphite (HOPG) is investigated. Pt is deposited only at the step edges of HOPG and not on the basal planes, leading to the formation of laterally aligned Pt NWs. A growth model involving a morphological transition from 0-D to 1-... | eng_Latn | 11,701 |
Free space optical communication over the Ghanaian Turbulent Atmospheric Channel | A thesis submitted to the Department of Electrical/Electronic Engineering, ::: College of Engineering in partial fulfillment of the requirements for the degree of ::: MSc Telecommunication Engineering, 2014 | Using ultrafast optical-pump terahertz-probe spectroscopy, we study the THz dynamics and electronic cooling in few-layer epitaxial and CVD graphene; a microscopic theory of carrier-carrier and carrier-phonon interactions accounts quantitatively for the observed dynamics. | eng_Latn | 11,702 |
The Krypton Yellow-Green Laser for the Treatment of Facial Vascular and Pigmented Lesions | There has been a bewildering increase in the number and types of lasers available to the modern surgeon for the treatment of a variety of lesions. Pigmented and vascular lesions lend themselves to laser therapy and are common presentations in the cosmetic practice. While many different lasers may be effective for the t... | Chemical doping in graphene due to polymer molecules adsorption has attracted much recent interest because of the modification of electrical, magnetic, and optical properties of graphene. We show a reversible charge-transfer doping effect in graphene due to the reaction with poly(methyl methacrylate) (PMMA) residues. B... | eng_Latn | 11,703 |
Boundary conditions at the walls with thermionic electron emission in two temperature modeling of “thermal” plasmas | In this paper, we propose new boundary conditions for the electric potential, the electron energy equation, and the energy equation for heavy particles (ions and neutrals) at the hot walls with thermionic electron emission for two-temperature thermal arc models. The derived boundary conditions assume that the walls are... | We present a concept for an ultrathin solar fuel device with a nanostructured back-contact. Using rigorous simulations, we show that the nanostructuring significantly increases the absorption in the semiconductor, CuBi2O4 in this case, by 47% (5.2 mA cm–2) through the excitation of plasmonic modes. We are able to attri... | eng_Latn | 11,704 |
Experimental Observation of Carbon and Carbon-Metal Nanotoroids and New Carbon-Metal Superstructures at Nanoscale | We report on experimental observation (by AFM, STM and HRTEM methods) of nanotoroids for both carbon and carbon-metal superstructures produced by methods of arc discharge and laser ablation. Size of superstructures is ~ 10 nm for carbon and ~ 30 nm for carbon-metal (outer diameter), with inner diameter ~ 1/3 of the tot... | Smooth and continuous diamond films have been heteroepitaxially grown on β‐type silicon carbide (β‐SiC) (001) surfaces. The smooth films can be obtained in the thickness of less than 6 μm which is the smallest in heteroepitaxial diamonds. The epitaxial growth is composed of three steps; (i) Bias enhanced nucleation on ... | eng_Latn | 11,705 |
Spectrin-based membrane skeleton: a multipotential adaptor between plasma membrane and cytoplasm | Pages 1029–1065: Vann Bennett. “Spectrin-Based Membrane Skeleton: A Multipotential Adaptor Between Plasma Membrane and Cytoplasm.” Page 1056: Ref. 36 should read BENNETT, H., and J. CONDEELIS. Isolation of an immunoreactive analogue of brain fodrin that is associated with the cell cortex of Dictyostelium amoebae. Cell ... | The results of the theoretical investigation of the curvature influence of the strained graphene nanoribbon on its sensory ::: properties are presented in the given work. The attachment mechanisms of hydrogen atoms to the plane and the wavelike ::: graphene nanoribbon are studied by the tight-binding method. For the fi... | eng_Latn | 11,706 |
Study on Phase Transformation Behaviors, Shape Memory Effects and Mechanical Properties of TiNiMo Shape Memory Alloys | Phase transformation behaviors, shape memory effects and mechanical properties of TiNiMo shape memory alloys are investigated. It is found that a R phase transformation exists in TiNiMo alloy, and the adition of Mo will lower the martensite start (Ms) temperature of TiNi alloy, and that the Ms temperatures of Ti(50)Ni... | In this paper TPMS(Tire pressure monitoring system) provides real time monitoring of the tires and plays an important role in vehicle safety. In this work we have investigate the MEMS pressure sensor structure, which is important in the successful of micromachined pressure sensor. MEMS pressure sensor structure based o... | eng_Latn | 11,707 |
Reversible Charge-Transfer Doping in Graphene due to Reaction with Polymer Residues | Chemical doping in graphene due to polymer molecules adsorption has attracted much recent interest because of the modification of electrical, magnetic, and optical properties of graphene. We show a reversible charge-transfer doping effect in graphene due to the reaction with poly(methyl methacrylate) (PMMA) residues. B... | We present the results of a computer simulation study of the structure of the interface between liquid Ga and the (111) face of diamond, with which we reinterpret the findings from an x-ray reflectivity study of that interface [W. J. Huisman, J. F. Peters, M. J. Zwanenburg, S. A. de Vries, T. E. Derry, D. Abernathy, an... | eng_Latn | 11,708 |
Universal deformation pathways and flexural hardening of nanoscale 2D-material standing folds | In the present work, we use atomic force microscopy nanomanipulation of 2D-material standing folds to investigate their mechanical deformation. Using graphene, h-BN and talc nanoscale wrinkles as testbeds, universal force–strain pathways are clearly uncovered and well-accounted for by an analytical model. Such universa... | The paper introducess the implemented conditions which colling recycle of flexible base on Ying-DaLine.It over all xpounds the investigation of road condlitions of original pavement,indoor trial study,determination of trial lot plan as well as completion of trial lot etc. | eng_Latn | 11,709 |
Fluorescence excitation spectra of the bΠu1, b′Σu+1, cnΠu1, and cn′Σu+1 states of N2 in the 80–100nm region | Fluorescence excitation spectra produced through photoexcitation of N2 using synchrotron radiation in the spectral region between 80 and 100nm have been studied. Two broadband detectors were employed to simultaneously monitor fluorescence in the 115–320nm and 300–700nm regions, respectively. The peaks in the vacuum ult... | In the present work, we use atomic force microscopy nanomanipulation of 2D-material standing folds to investigate their mechanical deformation. Using graphene, h-BN and talc nanoscale wrinkles as testbeds, universal force–strain pathways are clearly uncovered and well-accounted for by an analytical model. Such universa... | eng_Latn | 11,710 |
Electron diffraction study of small bundles of single-wall carbon nanotubes with unique helicity | The selected-area electron diffraction technique has been used to investigate the structure of bundles of single-wall carbon nanotubes synthesized by the catalytic chemical vapor deposition method. The helicity and lattice packing of the single-wall carbon nanotubes within the bundles have been deduced from the experim... | Summary In this abstract, we propose a new finite-difference scheme for solving wave equations. This scheme splits the multidimensional system into different directions and solves each direction implicitly. Unlike most splitting methods in the literature which produce numerical anisotropy in diagonal directions, this m... | eng_Latn | 11,711 |
Investigation of diamond-like carbon films for protection and stabilization of selenium-containing photoreceptors in electrophotography | Abstract The possibilities of diamond-like carbon film applications for protection and stabilization of selenium-containing photoreceptors in electrophotography have been studied experimentally. We have determined the optimal conditions for deposition of diamond-like a-C:H films as well as their thickness at which the ... | Combining Landau diamagnetism and differential magnetic susceptibility to an electromagnetic wave, we theoretically predict a graphene-sheet periodic structure, which exhibits a left-handed property to an electromagnetic wave in the infrared region by modulating external fields. Our new mechanism, unlike the usual mech... | eng_Latn | 11,712 |
Subnanometer vacancy defects introduced on graphene by oxygen gas. | The basal plane of graphene has been known to be less reactive than the edges, but some studies observed vacancies in the basal plane after reaction with oxygen gas. Observation of these vacancies has typically been limited to nanometer-scale resolution using microscopic techniques. This work demonstrates the introduct... | A report is presented, for the first time, on the observation of optical resonance modes in free-standing InGaAs/GaAs quantum dot microtubes at room temperature. The three-dimensionally confined optical modes, with wavelengths in the range of 1.1-1.3 mum and an intrinsic Q-factor of -2000, are directly related to the m... | eng_Latn | 11,713 |
Line defects and induced doping effects in graphene, hexagonal boron nitride and hybrid BNC | Effects on the atomic structure and electronic properties of two-dimensional graphene (G) and h-BN sheets related to the coexistence of dopants and defects are investigated by using density functional theory based methods. Two types of extended line defects are considered for pristine G and h-BN sheets. In these sheets... | We present first-principles studies on how to engineer band lineups of nanosized radial heterojunctions, Si/Ge core-shell nanowires. Our calculation reveals that band offsets of these one-dimensional nanostructures can be tailored by applying the axial strain. In particular, the valence band offset can be efficiently t... | eng_Latn | 11,714 |
Low-frequency optical dielectric response and rigidity transitions in network glasses | Self-organization occurring in ${\mathrm{As}}_{x}{\mathrm{S}}_{1\ensuremath{-}x}$ and ${\mathrm{As}}_{x}{\mathrm{Se}}_{1\ensuremath{-}x}$ glass alloy films reflects in their low-frequency optical dielectric response, and valuable information about the building blocks conforming their structure, can be derived from the ... | Abstract This research is focused on the effects of nonlinear terms on the dynamical behavior of graphene reinforced laminated composite plates. Firstly, the governing equations of the graphene reinforced composite thin plate subjected to transverse excitations are derived by using the Hamilton's principle and the von ... | eng_Latn | 11,715 |
Quantitative measure of nanoscale adhesion hysteresis by ultrasonic force microscopy | Adhesion hysteresis is the difference between the work used on separating two surfaces and the work gained on bringing them back together. Although much effort has been invested into adhesion hysteresis investigations at macroscales and microscales, its measurements at the nanolengths or even molecular lengths are stil... | We describe linear scaling methods for electronic structure calculations and quantum molecular dynamics simulations which are based on an orbital formulation of the electronic problem. In particular, we discuss some open problems which need to be addressed to improve the performance of these methods, and briefly review... | eng_Latn | 11,716 |
A comparative study of a self strain-monitoring carbon nanotube film and carbon fibers under flexural loading by electrical resistance changes | With the increased use of composites for load-carrying structures, the ability to obtain strain and damage information is critical to maintain reliable structures in the field. A promising class of multifunctional composites with the ability to self-sense strain and/or damage is possible through the use of carbon fiber... | Abstract We propose a new model which simulates the motion of free electrons in graphene by the evolution of strings on manifolds. In this model, molecules which constitute sheets of graphene are polygonal point-like structures which build ( N + 1 ) -dimensional manifolds. By breaking the gravitational-analogue symmetr... | eng_Latn | 11,717 |
Structure versus electron effects in the growth mode of pentacene on metal-induced Si(111)-square root(3) x square root(3) surfaces. | The growth of pentacene films on different metal (Ga, Pb, Bi, Ag) induced Si(111)-(square root(3) x square root(3))R30 degrees surfaces is investigated by scanning tunneling microscopy. On surfaces with high atomic surface roughness, such as GaSi-square root(3), beta-PbSi-square root(3), and alpha-BiSi-square root(3), ... | Silicene and Graphene are similar and have $\pi$-$\pi^*$ bands. However band width in silicene is only a third of graphene. It results in a substantial increase in the ratio of Hubbard U to band width W, U/W $\sim$ 0.5 in graphene to $\sim 1$ in silicene. This enhancement, 2 dimensionality and phenomenology suggest a M... | eng_Latn | 11,718 |
Electron-Electron Interaction in Nanographite Ribbons | We study the π electronic structure of graphite ribbons of a nanometer width by taking account of the long-range electron-electron interaction. The primary features like energy dispersion and bond order distribution are essentially determined by the nearest-neighbor transfer alone, meaning their strong dependency on th... | The coating of the surface on H13 steel die was prepared by electrical spark deposition. Its wear and corrosion resistance were studied. The results indicate that, the wear resistance of the sample with electric spark coating is 4.3 times higher than that of the untreated sample, while corrosion resistance is 2.21 time... | eng_Latn | 11,719 |
Fermi Velocity Modulation in Graphene by Strain Engineering | Using full-potential density functional theory (DFT) calculations, we found a small asymmetry in the Fermi velocity of electrons and holes in graphene. These Fermi velocity values and their average were found to decrease with increasing in-plane homogeneous biaxial strain; the variation in Fermi velocity is quadratic i... | FIELD: information technologies. SUBSTANCE: systems and methodologies are described that provide methods to efficiently search for a cell in a wireless communication system. In one aspect a scheme of repeated frequency use may be generated by application of frequency shifts to reference signals transmitted from cells, ... | eng_Latn | 11,720 |
Optical properties of GaN synthesized by implantation of nitrogen ions into GaAs | Abstract Implantation of N ions with doses of 3 × 1 0 16 and 3 × 1 0 17 cm - 2 and energies of 100 keV into semiinsulating (1 0 0) GaAs substrates has been performed in order to synthesize the GaN compound. The samples have been annealed in a furnace at 750 °C for 30 min in N gas flow or under GaAs powder and then char... | The results of the theoretical investigation of the curvature influence of the strained graphene nanoribbon on its sensory ::: properties are presented in the given work. The attachment mechanisms of hydrogen atoms to the plane and the wavelike ::: graphene nanoribbon are studied by the tight-binding method. For the fi... | eng_Latn | 11,721 |
Mechanical Characterization of Graphene | The emergence of monolayer carbon atom sheets, graphene, as a next generation advanced material, has potential applications in promising fields such as composite materials and energy storage. Graphene has exceptional mechanical properties, the most notable of which are ultrahigh strength and yield strain. Both experime... | As part of the LANL/VNIIEF collaboration a high velocity cylindrical liner driven Hugoniot experiment is being designed to be driven by a VNIEF Disk Explosive Magnetic (flux compression) Generator (DEMG). Several variations in drive current and liner thickness have been proposed. This presentation will describe the LAN... | eng_Latn | 11,722 |
Electronic cooling in epitaxial and CVD graphene | Using ultrafast optical-pump terahertz-probe spectroscopy, we study the THz dynamics and electronic cooling in few-layer epitaxial and CVD graphene; a microscopic theory of carrier-carrier and carrier-phonon interactions accounts quantitatively for the observed dynamics. | A CUDA implementation of the 3D viscous incompressible Navier-Stokes equations is proposed using as advection operator the BFECC (Back and Forth Error Compensation and Correction) schema. The Poisson problem for pressure is solved with a CG (Conjugated Gradient) preconditioning the system with FFTs (Fast Fourier Transf... | eng_Latn | 11,723 |
Analysis on User's Electroencephalography for Automatic Detection of 3D Syndrome | Various contents utilizing 3D holographic image have been developed and this led to the need of research on problems which are related to 3D syndrome. It is now more urgent to find the mechanism to sort out such problems as some people show such symptoms as fatigue, dizziness and vomiting after watching 3D contents. Th... | Characteristic features of the d-band in electronic structure of transition metals are quite effective as descriptors of their catalytic activity toward oxygen reduction reaction (ORR). With the promise of graphene-based materials to replace precious metal catalysts, descriptors of their chemical activity are much need... | kor_Hang | 11,724 |
Energy absorption characteristics of single-walled carbon nanotubes | The excellent mechanical properties of carbon nanotubes make them potential candidates for engineering application. In this paper, the impact and failure behaviors of single-walled carbon nanotubes (SWCNTs) are investigated. The effects of diameter, length, and chirality on their energy absorption characteristics under... | Abstract For experiments with future hadron colliders involving multi-TeV proton beams, such as the LHC and SSC, sampling calorimeters with silicon as active medium satisfy the special experimental conditions. Defect formation processes and electrical behavior of neutron irradiated p + -n ion implanted silicon detector... | eng_Latn | 11,725 |
Optimal electrode shape and size of doubly rotated quartz plate thickness mode piezoelectric resonators | Using the Stevens–Tiersten equation for slowly varying thickness modes in doubly rotated quartz plate piezoelectric resonators, we determine optimal electrode shape and size for these resonators. The electrodes obtained are optimal in that they satisfy Bechmann’s number in every direction. | For a nanowire quantum dot with the confining potential modeled by both the infinite and the finite square wells, we obtain exactly the energy spectrum and the wave functions in the strong spin-orbit coupling regime. We find that regardless of how small the well height is, there are at least two bound states in the fin... | eng_Latn | 11,726 |
Electrical rectification by magnetic edge states | Abstract We investigate electron channelling by inhomogeneous magnetic fields in hybrid semiconductor/ferromagnet structures. A novel type of rectifying behaviour is observed in the current–voltage characteristics measured along the drift path of magnetic edge states. This rectification effect is switched on by the app... | Abstract EPR investigations on light-emitting Manganese centres in device-near ZnS or ZnSe thin-film layers were done. Mn 2+ centres were detected in both basic modifications of ZnS. Assertion on the crystallinity could be made. The efficiency of EPR is demonstrated by some examples. | eng_Latn | 11,727 |
Microstructural characterization of Au-free Si/Ti/Al/Cu ohmic contacts in an AlGaN/GaN heterostructure | Abstract A complementary metal-oxide semiconductor (CMOS)-compatible Au-free Si/Ti/Al/Cu ohmic metallization scheme has been developed for AlGaN/GaN power transistors epitaxially grown on Si substrates. The Si/Ti/Al/Cu metallization exhibited a low specific contact resistance of 3.5 × 10 − 6 Ω cm 2 after optimizing the... | Recently, there has been an increase in research relating to the search for new optoelectronic materials for photovoltaic devices and light-emitting diodes. This research focuses on developing materials that not only possess the required optoelectronic properties (high absorption, efficient photon emission, and high ch... | eng_Latn | 11,728 |
Electrochemical intercalation into graphite seen as an electrocapillary process | Abstract The electrochemical intercalation of H 2 SO 4 into graphite leads to the well known graphite salts C + n HSO − 4 . χH 2 SO 4 (with n → 20), χ ≈ 2.5). The potential—charge relations observed during intercalation agree well with a model involving the extended graphene layer-intercalate interfacial capacitance. T... | We propose a novel method for speeding up stochastic optimization algorithms via sketching methods, which recently became a powerful tool for accelerating algorithms for numerical linear algebra. We revisit the method of conditioning for accelerating first-order methods and suggest the use of sketching methods for cons... | eng_Latn | 11,729 |
Melt Rheology and Thermal Stability of Nanoclay Filled Poly(3hydroxybutyrate-co-4hydroxybutyrate) Biocomposites | Melt apparent shear viscosity for poly(3hydroxybutyrate-co-4hydroxybutyrate) composites filled with nanoclay was measured by means of a capillary rheometer at temperatures ranging from 140 to 160 °C and apparent shear rates varying from 13 to 1,198 s−1, and thermal stability was conducted on a thermogravimetric analyze... | Abstract This research is focused on the effects of nonlinear terms on the dynamical behavior of graphene reinforced laminated composite plates. Firstly, the governing equations of the graphene reinforced composite thin plate subjected to transverse excitations are derived by using the Hamilton's principle and the von ... | eng_Latn | 11,730 |
Poole-Frenkel conduction in amorphous solids | Abstract The nature of the electrical conduction process in amorphous solids, using as a basis the ionization of local defects by an applied field, is investigated. It is shown that the Poole-Frenkel effect is a limiting case of a more general analysis that can be extended to cover the experimentally available range of... | We review the current understanding of the acoustic phonon contribution to thermal transport in nanostructures from nanoparticles to thin films and membranes. Confinement and cavity effects will be discussed as well as electrical and optical measurement methods. | eng_Latn | 11,731 |
An organically modified sol–gel membrane for detection of lead ion by using 2-hydroxy-1-naphthaldehydene-8-aminoquinoline as fluorescence probe | Abstract A fluorescent reagent, 2-hydroxy-1-naphthaldehydene-8-aminoquinoline (HNAAQ) was synthesized, and an organically modified sol–gel membrane for detection of lead ion by using HNAAQ as fluorescence probe was fabricated. Under the optimum conditions, by a coplanar effect and the degree of molecular conjugation du... | We demonstrate snake-like motion of graphene nanoribbons atop graphene and hexagonal boron nitride (h-BN) substrates using fully atomistic nonequilibrium molecular dynamics simulations. The sliding dynamics of the edge-pulled nanoribbons is found to be determined by the interplay between in-plane ribbon elasticity and ... | eng_Latn | 11,732 |
The curvature influence of the graphene nanoribbon on its sensory properties | The results of the theoretical investigation of the curvature influence of the strained graphene nanoribbon on its sensory ::: properties are presented in the given work. The attachment mechanisms of hydrogen atoms to the plane and the wavelike ::: graphene nanoribbon are studied by the tight-binding method. For the fi... | AIM: To assess the ability of galvanic skin response (GSR) to differentiate between tactile and painful stimulation in newborn infants, and to compare this with the ability of the premature infant ... | eng_Latn | 11,733 |
Indentation size effect for spherical nanoindentation on nanoporous gold | Abstract We find that the indentation size effect (ISE) occurs during spherical indentation on nanoporous gold (np-Au). The hardness increases as the indenter radius decreases at a fixed representative strain. We prepare np-Au samples with a ligament size of 26 nm by free-corrosion dealloying and perform multiple spher... | We examine the influence of Ni impurity in cuprates on the distribution of hole carriers by performing numerically exact diagonalization calculations for a model consisting of $\text{Cu}\text{ }3d$, $\text{Ni}\text{ }3d$, and $\text{O}\text{ }2p$ orbitals. Using realistic parameters for the system, we find that a hole ... | eng_Latn | 11,734 |
Modeling of Electron Devices Based on 2-D Materials | The advent of graphene and related 2-D materials has attracted the interest of the electron device research community in the past 14 years. The possibility to boost the transistor performance and the prospects to build novel device concepts with 2-D materials and their heterostructures has awakened a strong experimenta... | The 2D problem of excitation of a circular metamaterial cylinder by a filamentary source is numerically investigated. It is found that, for the minus one values of the relative permittivity and permeability, the field on the surface of the cylinder concentrates in a region that is located on the illuminated surface of ... | eng_Latn | 11,735 |
High–quality single–crystal diamond–graphite–diamond membranes and devices | Implantation of hydrogen ions into synthetic single–crystal diamonds followed by subsequent high–temperature annealing and anodic etching of implanted crystals was used to obtain structurally perfect 30–nm thick diamond membranes with optically active NV− centres (area up to several tens mm²) appropriate for use in int... | Abstract Calculations employing the simple Monte Carlo model of gamma-ray interaction in a silicon ΔE -detector provide a very reliable energy spectrum of Compton-scattered electrons. This makes it possible to determine the thickness of a Si ΔE -detector with a good accuracy. | eng_Latn | 11,736 |
Research update: strain and composition effects on ferromagnetism of Mn0.05Ge0.95 quantum dots | Mn0.05Ge0.95 quantum dots (QDs) samples were grown by molecular beam epitaxy on Si substrates and 15-nm-thick fully strained Si0.8Ge0.2 virtual substrates, respectively. The QDs samples grown on the Si0.8Ge0.2 virtual substrates show a significant ferromagnetism with a Curie temperature of 227 K, while the QDs samples ... | Abstract We propose a new model which simulates the motion of free electrons in graphene by the evolution of strings on manifolds. In this model, molecules which constitute sheets of graphene are polygonal point-like structures which build ( N + 1 ) -dimensional manifolds. By breaking the gravitational-analogue symmetr... | eng_Latn | 11,737 |
Alloy nanowires: Invar inside carbon nanotubes | Invar (Fe65Ni35), a ‘zero’ ::: thermal expansion alloy consisting of Fe and Ni, has been successfully ::: introduced into carbon nanotubes by pyrolysing, at 800 °C, aerosols of ::: NiCp2/FeCp2 mixtures dissolved in ::: C6H6; scanning electron microscopy (SEM) and ::: high-resolution transmission electron microscopy (HR... | The synthesis of new low-dimensioned solids relies on difficult chemistry that simultaneously takes into account many different factors, some of them largely conflicting. The design of chainlike niobium and tantalum chalcogenides reported here illustrates the experimental approaches that can be used to stabilize chainl... | eng_Latn | 11,738 |
High Mobility Flexible Graphene Field-Effect Transistors with Self-Healing Gate Dielectrics | A high-mobility low-voltage graphene field-effect transistor (FET) array was fabricated on a flexible plastic substrate using high-capacitance natural aluminum oxide as a gate dielectric in a self-aligned device configuration. The high capacitance of the native aluminum oxide and the self-alignment, which minimizes acc... | We study the topological states which appear at the interface between a topological insulator (TI) and a conventional insulator (CI) using effective Hamiltonians which accurately describe the band structure of the Bi$_2$Se$_3$ family. Due to the hybridization between the TI and the CI states, the band-gap that appears ... | eng_Latn | 11,739 |
Quantum optical oscillations of the Fermi level in a graphene-based Schottky junction | The strong movility of charge carriers in graphene allows the introduction of high doping concentration in this material and, this way, the Fermi level can be tunned over a large range of energies. The above situation acquires a complex character in presence of strong electron–photon interaction that induces new quantu... | The paper presents the information on specific design, accuracy characteristics, and results of testing of a prototype fiber-optic gyro of accuracy grade 0.01°/h, with sensing element spool diameter of 150 mm, designed by Concern RCSI Elektropribor, JSC. The device is compared to a number of sensors of similar accuracy... | eng_Latn | 11,740 |
Composition ratio dependent refractive index and optical bandgap of nonstoichiometric Si1−xGex on silicon | Nonstoichiometric Si 1−x Ge x films fabricated by plasma enhanced chemical vapor deposition (PECVD) with different flounce ratios are demonstrated to show the composition ratio dependent optical properties, including refractive index, bandgap and optical absorption. By increasing the fluence ratio from 0.2 to 0.5, the ... | A simple structural model is proposed for the zigzag interface formed by contacting two-dimensional graphene-like compounds AB and CD (both free and formed on a metal). For the graphene–hexagonal boron nitride system, analytical expressions for the electron spectrum, density of states, and atom occupation numbers at th... | eng_Latn | 11,741 |
Ultra-wideband (UWB) Monopole Antenna with Dual Notched Bands by Combining Electromagnetic-Bandgap (EBG) and Slot Structures | A novel design technique, which combines mushroom-shaped electromagnetic-bandgap (EBG) structures and a slot together, is proposed for ultra-wideband (UWB) band-notched antenna. The implementation of the slot can not only create its own notched band, but also enhance the filtering performance at the other notched band ... | We present molecular dynamics calculations on the evolution of Ni nanowires stretched along the (111) and (100) directions, and at two different temperatures. Using a methodology similar to that required to build experimental conductance histograms, we construct minimum crosssection histograms H(Sm). These histograms a... | eng_Latn | 11,742 |
REACTION OF gem-DIHALIDES WITH NICKEL(O) COMPLEXES: SELECTIVE METHYLENE INSERTION INTO C–H BOND OF OLEFINS | The reaction between methylene dihalides and ethylene assisted by the nickel(O)-triphenylphosphine complex has been found to give propylene, which was formed by selective methylene insertion into the olefinic C–H bond of ethylene. Similarly propylene and methylene dibromide gave isobutylene. | Recently Geis fabricated a composite cold cathode emitter made of diamond doped by substitutional nitrogen on a roughened metallic substrate, which is characterized by high field emission currents at very low power. Using an internal field emission mechanism through the Schottky barrier at the metal diamond interfaces ... | yue_Hant | 11,743 |
3D printed long period gratings for optical fibers. | We demonstrate a simple technique for implementing long period grating (LPG) structures by the use of a 3D printer. This Letter shows a way of manipulating the mode coupling within an optical fiber by applying stress through an external 3D printed periodic structure. Different LPG lengths and periods have been studied,... | Characteristic features of the d-band in electronic structure of transition metals are quite effective as descriptors of their catalytic activity toward oxygen reduction reaction (ORR). With the promise of graphene-based materials to replace precious metal catalysts, descriptors of their chemical activity are much need... | eng_Latn | 11,744 |
Novel electrically conductive graphite material | A novel electrically conductive graphite material is characterized in that: the electrically conductive graphite material comprises a carbon material having a dimension equal to or less than 200nm, wherein the carbon material is graphene selected from a single layer graphene or multi-layer graphene, and a part of carbo... | This work was supported by the UK Engineering and Physical Sciences Research Council (EPSRC) grant EP/K02924X/1. E.O.R. is supported by an EPSRC DTA studentship (University of Cambridge), and F.D.D. is supported by the Honorary Vice-Chancellor’s Award and a Qualcomm/DTA Studentship. | eng_Latn | 11,745 |
Cavity Backed Substrate Integrated Waveguide Horn Antenna with Enhanced Gain for 5G Applications | In this paper, cavity-backed substrate integrated waveguide (SIW) H-plane horn antenna with enhanced gain for 5G applications is proposed. A coaxial probe has been used to feed the SIW H-plane horn antenna. A metallic cavity has been used to enhance the gain of the antenna. The antenna with cavity shows almost 2 dB enh... | So far, the strategies for the synthesis of biomimetic dental enamel-like hydroxyapatite [Ca10(PO4)6(OH)2, HAp] have attracted great interest due to the extremely high orientation of HAp crystals. In the present study, a facile method via hydrothermal treatment of the hillebrandite [Ca2(SiO3)(OH)2] nanobelts as hard-te... | eng_Latn | 11,746 |
Ballistic simulation of Ratchet effect in antidot lattices patterned on graphene | In this contribution, we investigate the mechanism governing the Ratchet effect in patterned monolayer graphene, at the ballistic nanoscale. Still smaller than currently achievable and manifacturable devices, the simulated structures serve to exemplify the dependence of charge scattering on the arrangement of lattice d... | We argue that in the measured $p_T$ domain of RHIC, collisional rather than the radiative energy loss is the dominant mechanism for jet quenching. Accordingly we calculate nuclear suppression factor for light hadrons by taking only the elastic energy loss in sharp contrast with the previous calculations where only the ... | eng_Latn | 11,747 |
Raman spectroscopy of acoustic phonons in periodic and Fibonacci superlattices | Abstract Results of Raman scattering experiments on (a) periodic superlattices made up of GaAs/InxGa1−xAs layers with high indium concentrations, (b) GaAs/Ga1−xAlxAs Fibonacci superlattices, are presented. We discuss the observed peak positions and intensities using the continuum theory of acoustic wave propagation in ... | Abstract Understanding the atomistic mechanisms of tensile failure in carbon fibers is important for fiber manufacturing and applications. Here we design structural faults with atomistic details, pertaining to polyacrylonitrile (PAN) derived fibers, and probe them using large-scale molecular dynamics simulations to unc... | eng_Latn | 11,748 |
Wave Packet Dynamics at an Extended Seam of Conical Intersection: Mechanism of the Light-Induced Wolff Rearrangement. | Quantum dynamics calculations on a model surface based on CASPT2//CASSCF calculations are carried out to probe the traversal of a wave packet through an extended seam of conical intersection during the light-induced Wolff rearrangement of diazonaphtoquinone. The reaction is applied in the fabrication of integrated circ... | This is a status report about the ongoing work on the realization of quantum field theory on curved graphene spacetimes that uses Weyl symmetry. The programme is actively pursued from many different perspectives. Here we point to what has been done, and to what needs to be done. | eng_Latn | 11,749 |
Low-dimensional solids: an interface between molecular and solid-state chemistry? The example of chainlike niobium and tantalum chalcogenides | The synthesis of new low-dimensioned solids relies on difficult chemistry that simultaneously takes into account many different factors, some of them largely conflicting. The design of chainlike niobium and tantalum chalcogenides reported here illustrates the experimental approaches that can be used to stabilize chainl... | As electronic devices and integrated circuits get smaller and smaller, eventually quantum-mechanic effects take over. As Saito discusses in his Perspective, results reported by ::: Collins ::: et al. ::: in the same issue demonstrate the use of carbon nanotubes to create nanometer-scale devices known as diodes. Rather ... | eng_Latn | 11,750 |
Fabrication and Test of Carbon Nanotubes Field Emission Cathode Made by Spin-Coating Technique | A novel fabrication process of carbon nanotubes cathode emitters is presented in the work.Single-walled carbon nanotubes(SWNTs) with high purity have been synthesized by dc arc discharge evaporation of a carbon electrode including Ni and Y_2O_3 catalysts in H_2-He mixture gas.As-grown SWNTs are purified by gas phase ox... | Smooth and continuous diamond films have been heteroepitaxially grown on β‐type silicon carbide (β‐SiC) (001) surfaces. The smooth films can be obtained in the thickness of less than 6 μm which is the smallest in heteroepitaxial diamonds. The epitaxial growth is composed of three steps; (i) Bias enhanced nucleation on ... | eng_Latn | 11,751 |
Synthesis of isothiocyanato-1-[1-(2-benzo[b]thienyl)cyclohexyl]piperidines, potential irreversible ligands at the dopamine re-uptake site | Isomeric isothiocyanate derivatives 2–7 of the potent dopamine re-uptake (DA) inhibitor 1-[1-(2-benzo-[b]thienyl)cyclohexyl]piperidine (BTCP 1) have been synthesized as potential irreversible ligands for this site. NaNO2–CF3CO2H provided a mild procedure for mononitration of the benzo[b]thienyl ring of 1 as a route to ... | Chemical doping in graphene due to polymer molecules adsorption has attracted much recent interest because of the modification of electrical, magnetic, and optical properties of graphene. We show a reversible charge-transfer doping effect in graphene due to the reaction with poly(methyl methacrylate) (PMMA) residues. B... | eng_Latn | 11,752 |
Fabrication and optical characterization of III‐nitride air‐bridge photonic crystal with GaN quantum dots | We report the fabrication of III-nitride air-bridge photonic crystals with GaN quantum dots for the first time. Photonic crystals with various periodicities and airhole diameters were fabricated. Abrupt vertical profiles and high aspect ratio (∼3) were achieved with excellent reproducibility even to the structure with ... | The performance of N-doped graphene on Li-ion battery has been investigated systematically by means of a density functional theory method. Pyridinic N doping, graphitic N atoms and 5-8-5 double vacancies have been selected as the functional defects to study their influence on Li storage compared to the pristine graphen... | eng_Latn | 11,753 |
Heat exchangers for solar concentrators | Abstract The theoretical analysis of three types of heat exchangers for use with solar concentrators is developed. Under the assumptions of an incompressible inviscid fluid, constant energy rate input per unit area, and losses to the surroundings, an expression for the temperature field, and average exit temperature is... | The melting transition of methane adsorbed in nanopores has been studied and compared in two types of structures: carbon slits pores and square shaped channels. We show that the nano-confinement not only modifies the temperatures of phase transformation but also induces strong space heterogeneity of the adsorbate. We e... | eng_Latn | 11,754 |
Nanoscale Dielectric Capacitors Composed of Graphene and Boron Nitride Layers: A First Principles Study of High-Capacitance at Nanoscale | We investigate a nanoscale dielectric capacitor model consisting of two-dimensional, hexagonal h-BN layers placed between two commensurate and metallic graphene layers using self-consistent field density functional theory. The separation of equal amounts of electric charge of different sign in different graphene layers... | We report an angle-resolved photoemission investigation of optimally-doped Ca$_{0.33}$Na$_{0.67}$Fe$_2$As$_2$. The Fermi surface topology of this compound is similar to that of the well-studied Ba$_{0.6}$K$_{0.4}$Fe$_2$As$_2$ material, except for larger hole pockets resulting from a higher hole concentration per Fe ato... | eng_Latn | 11,755 |
Light emission from Na/Cu(111) induced by a scanning tunneling microscope | Measurements of light emission from a scanning tunneling microscope probing a Na overlayer on the (111) surface of Cu are reported along with the results of a model calculation that essentially agree with the experimentalones. The observed light-emission spectra show two characteristic features depending on the bias vo... | We have developed a new theoretical formalism for phonon transport in nanostructures using the nonequilibrium phonon Green's function technique and have applied it to thermal conduction in defective carbon nanotubes. The universal quantization of low-temperature thermal conductance in carbon nanotubes can be observed e... | eng_Latn | 11,756 |
Imaging Material Components of an Integrated Circuit Interconnect | Two regions of interest on a copper/tungsten integrated circuit interconnect were imaged using two techniques: (a) the absorption spectrum was measured at 15 x-ray energies between 1687 and 1897 eV, and (b) the x-ray fluorescence spectrum was recorded with incident photon energies of 1822, 1797, and 1722 eV. The energi... | The literature concerning microstructure formation in Compacted Graphite Iron (CGI) is reviewed. CGI has an intermediate graphite morphology between Lamellar Graphite Iron (LGI) and Spheroidal Grap ... | eng_Latn | 11,757 |
Size-, position-, and separation-controlled one-dimensional alignment of nanoparticles using an optical near field | Particles several tens of nanometers in size were aligned in the desired positions in a controlled manner by using capillary force interaction and suspension flow. Latex beads 40-nm in diameter were aligned linearly around a 10-μm-hole template fabricated by lithography. Further control of their position and separation... | This manuscript presents a summary on the parallel session V "Particles in the Cosmos" of the Neutrino Oscillation Workshop -- NOW 2018. The topics covered by the session are a combination of new theoretical approaches and ideas and a selection of recent experimental results and upcoming projects. | eng_Latn | 11,758 |
The Hypergraphite: A possible extension of graphitic network | We propose a class of networks which can be regarded as an extension of the graphitic network. These networks are constructed so that surface states with non-bonding character (edge states) are formed in a tight-binding model with one orbital for each atomic site. Besides, for several networks, the tight-binding electr... | Abstract A new class of connected digraphs is introduced — the class of quasi-initially connected digraphs. They are enumerated in the labelled case. Using the apparatus developed for labelled quasi-initially connected digraphs respective results for other classes of labelled connected digraphs were obtained. | eng_Latn | 11,759 |
Microstructure and Properties of Low-carbon High Strength Dual Phase Steel Wire | Microstructure and properties of dual-phase steel wire were studied.It is shown that with the incresaing of subcritical quenching temperature,the substructure of martensite in dual-phase microstructure changes form twin-type to dislocation type,and the deformation capability and drawing properties of both phases are im... | Abstract We propose a new model which simulates the motion of free electrons in graphene by the evolution of strings on manifolds. In this model, molecules which constitute sheets of graphene are polygonal point-like structures which build ( N + 1 ) -dimensional manifolds. By breaking the gravitational-analogue symmetr... | eng_Latn | 11,760 |
Nearly perfect quark–gluon fluid | A statistical analysis of data from ultra-relativistic heavy-ion collisions has uncovered the specific viscosities of the quark–gluon plasma — suggesting that the hottest matter in the current Universe behaves like a near-perfect fluid. | The results of the theoretical investigation of the curvature influence of the strained graphene nanoribbon on its sensory ::: properties are presented in the given work. The attachment mechanisms of hydrogen atoms to the plane and the wavelike ::: graphene nanoribbon are studied by the tight-binding method. For the fi... | eng_Latn | 11,761 |
New boron nitride whiskers: showing strong ultraviolet and visible light luminescence. | Boron nitride whiskers with a special structure have been synthesized by a thermal reaction process. The as-prepared BN whiskers have a length of tens of micrometers and a mean diameter of 500 nm. High-resolution TEM analysis shows that the as-prepared BN whiskers can be described as a nanofiber-interweaved network. In... | The results of the theoretical investigation of the curvature influence of the strained graphene nanoribbon on its sensory ::: properties are presented in the given work. The attachment mechanisms of hydrogen atoms to the plane and the wavelike ::: graphene nanoribbon are studied by the tight-binding method. For the fi... | eng_Latn | 11,762 |
Microscopic structure of the Gamow-Teller resonance in 208Bi | The 2osPb(3He,t)20sBi reaction has been studied with the RCNP ring cyclotron at E(3He) = 450 MeV using the magnetic spectrometer Grand Raiden at 0 = 0”. The Gamow-Teller resonance is strongly excited at this bombarding energy. Its microscopic structure has been investigated by measuring the direct proton decay to the n... | The results of the theoretical investigation of the curvature influence of the strained graphene nanoribbon on its sensory ::: properties are presented in the given work. The attachment mechanisms of hydrogen atoms to the plane and the wavelike ::: graphene nanoribbon are studied by the tight-binding method. For the fi... | eng_Latn | 11,763 |
Efficient n-type doping in epitaxial graphene through strong lateral orbital hybridization of Ti adsorbate | Abstract In recent years, various doping methods for epitaxial graphene have been demonstrated through atom substitution and adsorption. Here we observe by angle-resolved photoemission spectroscopy (ARPES) a coupling-induced Dirac cone renormalization when depositing small amounts of Ti onto epitaxial graphene on SiC. ... | In this paper, aimed at the neutron transport equations of eigenvalue problem under 2-D cylindrical geometry on unstructured grid, the discrete scheme of Sn discrete ordinate and discontinuous finite is built, and the parallel computation for the scheme is realized on MPI systems. Numerical experiments indicate that th... | eng_Latn | 11,764 |
Interlayer Conductance of Graphene with Multiple Transfer Process | Electrical properties of multi-layer graphene are subject to variations due to random interlayer alignments. In this work we reported graphene interlayer conductance without special layer aligning. Ohmic contacts between two graphene layers are observed with resistance variations of more than one order. With Raman spec... | The six papers in this session address performance limits and transport characteristics of devices on strained and III-V substrates. The session begins with a paper by Oh and Wong from Stanford. They discuss a physics-based compact model for heterostructure devices. Luisier and colleagues from Purdue next apply an adva... | eng_Latn | 11,765 |
The release of hydrogen reaction of graphene modified NaAlH4. | In this experiment, we prepared a better performance graphene, by using butyrolactone and flavanone, promoting the graphite into high quality graphene strip. The obtained graphene were used to catalyze the hydrogen released by NaAlH4. The result proved that 5 wt% doped butyrolactone treated graphite and 2 wt% doped fla... | An atomic model of the laser-produced Al plasma has been developed and used to analyze excitation processes of recombination pumping soft X-ray lasers. A soft X-ray gain for H-like Balmer-α line and He-like 3d-2p transition in short-pulse intense KrF laser ( I L = 10 14 –10 15 W/cm 2 , T = 10–100 ps)-produced Al plasma... | eng_Latn | 11,766 |
52.1: Invited Paper: FEM and in situ TEM Studies | Field emission microscopy (FEM) study of carbon nanotube (CNT) with various tip radii was performed to reveal the origin of different types of FEM patterns (“pentagon” and “dim” patterns) so far reported. Dynamic behaviour and degradation mechanism of field-emitting CNTs were also studied by in-situ transmission electr... | Related Article: Yuanyuan Zhang, Xuan Zhang, Jiafei Lyu, Ken-ichi Otake, Xingjie Wang, Louis R. Redfern, Christos D. Malliakas, Zhanyong Li, Timur Islamoglu, Bo Wang, Omar K. Farha|2018|J.Am.Chem.Soc.|140||doi:10.1021/jacs.8b06789 | kor_Hang | 11,767 |
Charged Topological Solitons in Zigzag Graphene Nanoribbons | Graphene nanoribbons with zigzag terminated edges have a magnetic ground state characterized by edge ferromagnetism and antiferromagnetic inter edge coupling. This broken symmetry state is degenerate in the spin orientation and we show that, associated with this degeneracy, the system has topological solitons. The soli... | This paper considers corona discharge problems with multiple conductors, such as those appearing in some electrostatic precipitators. A common precise condition is identified in which the previous approaches proposed in the literature fail. For dealing with these conditions, a novel, stabilized, and regularized formula... | eng_Latn | 11,768 |
Suction Effects on the Transition and Reattachment of a Transitional Bubble | The effects of distributed suction on the transition and reattachment of the transitional bubble on an airfoil at a Reynolds number of 250,000 are investigated by analyzing the mean and fluctuating velocity profiles. It is found that suction delays separation and transition and decreases the turbulence intensity at the... | The results of the theoretical investigation of the curvature influence of the strained graphene nanoribbon on its sensory ::: properties are presented in the given work. The attachment mechanisms of hydrogen atoms to the plane and the wavelike ::: graphene nanoribbon are studied by the tight-binding method. For the fi... | eng_Latn | 11,769 |
Spectral imaging of single CdSe/ZnS quantum dots employing spectrally- and time-resolved confocal microscopy | A spectrally- and time-resolved study of single CdSe/ZnS quantum dots (QDs) is presented. To this end a versatile, high sensitivy spectrograph is coupled to a confocal laser-scanning microscope. The spectrograph is built in-house and is especially developed for use in fluorescence microscopy. The high sensitivity is ac... | Characteristic features of the d-band in electronic structure of transition metals are quite effective as descriptors of their catalytic activity toward oxygen reduction reaction (ORR). With the promise of graphene-based materials to replace precious metal catalysts, descriptors of their chemical activity are much need... | eng_Latn | 11,770 |
Communication: Influence of graphene interlayers on the interaction between cobalt phthalocyanine and Ni(111). | The influence of graphene interlayers on electronic interface properties of cobalt phthalocyanine on Ni(111) is studied using both photoemission and X-ray absorption spectroscopy. A charge transfer associated with a redistribution of the d-electrons at the Co-atom of the phthalocyanine occurs at the interface to Ni(111... | Intraoperative distinction of lesional tissue versus normal brain parenchyma can be difficult in neurosurgical oncology procedures. We report the successful, real-time visualization of central nervous system (CNS) lymphoma using the 'Second Window Indocyanine Green' (SWIG) method for two patients who underwent cranioto... | eng_Latn | 11,771 |
Passive laser Q-switches on the basis of LiF color center crystals for alexandrite laser | Passive laser Q-switches on the basis of crystals of LiF with F 3 - - and LiF with F 3 - -like centers, and LiF:O, OH with new F 2 + -like centers were investigated. The paper presents power characteristics and radiation parameters of alexandrite lasers with different Q-switches. Operating potentials of Q-switches are ... | The phase of graphene plasmon upon edge-reflection plays a crucial role on determining the spectral properties of graphene structures. In this article, by using the full-wave simulation, we demonstrate that the mid-infrared graphene plasmons are nearly totally reflected at the boundary together with a phase jump of app... | eng_Latn | 11,772 |
Cold-cathode emitter based on a metal-diamond tunneling junction | Recently Geis fabricated a composite cold cathode emitter made of diamond doped by substitutional nitrogen on a roughened metallic substrate, which is characterized by high field emission currents at very low power. Using an internal field emission mechanism through the Schottky barrier at the metal diamond interfaces ... | As electronic devices and integrated circuits get smaller and smaller, eventually quantum-mechanic effects take over. As Saito discusses in his Perspective, results reported by ::: Collins ::: et al. ::: in the same issue demonstrate the use of carbon nanotubes to create nanometer-scale devices known as diodes. Rather ... | eng_Latn | 11,773 |
Single-wall carbon nanotube dispersions stabilised with N-trimethyl-chitosan | We report the noncovalent complexation of a biocompatible low substituted N-trimethyl chitosan (TMC), a cationic chitosan derivative, onto the graphitic surface of single-walled carbon nanotubes (SWCNTs). TMC was synthesized and characterized by 1H-NMR. A yield between the range of 34% and 56% was obtained with a degre... | Recently Geis fabricated a composite cold cathode emitter made of diamond doped by substitutional nitrogen on a roughened metallic substrate, which is characterized by high field emission currents at very low power. Using an internal field emission mechanism through the Schottky barrier at the metal diamond interfaces ... | eng_Latn | 11,774 |
Novel phenyl migration of 1-phenylbenzo[b]thiophenium triflates in the thermolysis | Thermolysis of 1-phenylbenzo[b]thiophenium triflates at 180°C causes phenyl migration to give 2-phenylbenzo[b]thiophenes in high yields. Interestingly, the thermolysis of 1-phenylbenzo[b]thiophenium triflates having a substituent at the 2 position affords the corresponding 3-phenylbenzo[b]thiophenes. On the basis of th... | Abstract Monte Carlo simulation of the order–disorder transition revealed that the transition temperature of Co–Pt nanowires increases with wire diameter, approaching the bulk value if the size is large enough. The transition temperature is affected by the shape of cross-section, though the shape effect is less signifi... | eng_Latn | 11,775 |
Three-Dimensional Model of Cosmic-Ray Lepton Propagation Reproduces Data from the Alpha Magnetic Spectrometer on the International Space Station | We study the compatibility of Alpha Magnetic Spectrometer (AMS-02) data on the cosmic-ray (CR) positron fraction with data on the CR electron and positron spectra provided by PAMELA and Fermi LAT. We do that in terms of a novel propagation model in which sources are distributed in spiral arm patterns in agreement with ... | Lithium aluminum silicate (LAS) nanoparticles have been successfully loaded on graphene nanosheets by adding a silane coupling agent KH-550 by sol–gel process, hydrothermal reaction, and heat treatment process. By regulating the complex permittivity of reduced graphene oxide (rGO) by LAS nanoparticles and KH-550, LAS/r... | eng_Latn | 11,776 |
Magnetic phase transition of second-stage NiCl2-graphite intercalation compound in an external magnetic field | The AC magnetic susceptibility of the second-stage NiCl2-graphite intercalation compound along the easy plane has been measured in the presence of an external magnetic field parallel and perpendicular to the easy plane. The experimental result suggests that the intermediate 2D XY-like phase exists in the temperature ra... | The band profiles in InGaAsP single quantum well are investigated using the model solid theory under considering of the effect of strain.The band lineups for electrons and holes are tuned by changing Ga concentration x and As concentration y in the well on condition that the concentrations in the barrier are fixed.The ... | eng_Latn | 11,777 |
Size and shape dependent order–disorder phase transition of Co–Pt nanowires | Abstract Monte Carlo simulation of the order–disorder transition revealed that the transition temperature of Co–Pt nanowires increases with wire diameter, approaching the bulk value if the size is large enough. The transition temperature is affected by the shape of cross-section, though the shape effect is less signifi... | Abstract In situ composites can be obtained either by unidirectional eutectic solidification or by unidirectional solid- state decomposition. Techniques in the latter category are dealt with in this review. The solid-state growth methods may be classified, according to the state of the starting material, into (a) eutec... | eng_Latn | 11,778 |
Nitrogen-Doped Nanoporous Graphenic Carbon: An Efficient Conducting Support for O2Cathode | Herein, we synthesize a nanoporous N-doped graphenic carbon with high surface area and a higher graphenization/graphitic degree by further developing the metallothermic reduction of gaseous CO2 by adding N2 into the gas flow. The N-doped nanoporous carbon is composed of both a highly porous graphenic and non-graphitic ... | In this paper, the GMT–PO hybrid method accompanied by the iterative technique is applied successfully to calculate 3-D numerical diffraction coefficients (3-D NDC) of the irregular circular-cylinder edge. The computed RCS of the circular cylinder with 3-D NDC of the irregular edge is in good agreement with the measure... | eng_Latn | 11,779 |
Atomic resolution STM imaging of a twisted single-wall carbon nanotube | We present atomically resolved scanning tunneling microscopy images of single-wall carbon nanotubes (SWNT's) embedded in a crystalline nanotube rope. Although they may be interpreted as of a chiral nanotube, the images are more consistently explained as an achiral armchair tube with a quenched twist distortion. The exi... | A new method of staining the keratin filament matrix allowing a visualization of the filaments in cross section of hair fibres has been developed. It differs from previously published methods in that the hair fibres are neither fixed with OsO 4 nor treated with sulfur bond breaking agents. High contrast is still obtain... | eng_Latn | 11,780 |
Emerging trends in flame retardancy of biofibers, biopolymers, biocomposites, and bionanocomposites | Recent advancements in natural fiber-reinforced polymer composites have engineered the need to procure alternatives to replace metals in automotives, construction, aerospace, defense, electronics, and gas and oil industries. However, application versatility of biomaterials has been limited due to poor flame retardancy.... | Abstract This research is focused on the effects of nonlinear terms on the dynamical behavior of graphene reinforced laminated composite plates. Firstly, the governing equations of the graphene reinforced composite thin plate subjected to transverse excitations are derived by using the Hamilton's principle and the von ... | eng_Latn | 11,781 |
Electrochemical Deposition of Bismuth Micro- and Nanowires Using Electroplate and Lift Lithography | Patterned micro- and nanowires of several compositions in the solution series of Bi x Te y were electrochemically deposited using Electroplate and Lift (E&L) Lithography on Ultrananocrystalline Diamond (UNCD) templates. The composition of the deposited Bi x Te y wires was controlled by mixing saturated solutions of bis... | Abstract This research is focused on the effects of nonlinear terms on the dynamical behavior of graphene reinforced laminated composite plates. Firstly, the governing equations of the graphene reinforced composite thin plate subjected to transverse excitations are derived by using the Hamilton's principle and the von ... | eng_Latn | 11,782 |
From current trace to the understanding of confined media | Abstract.Nanopores constitute devices for the sensing of nano-objects such as ions, polymer chains, proteins or nanoparticles. We describe what information we can extract from the current trace. We consider the entrance of polydisperse chains into the nanopore, which leads to a conductance drop. We describe the detecti... | Abstract : The report contains a brief analysis of the following items: (a) Two-dimensional steady flow (variational method), (b) One-dimensional unsteady flow (variational method), (c) Plasma with finite conductivity (exact solutions), (d) Approximate solutions and linearized equations, (e) New numerical methods, (f) ... | eng_Latn | 11,783 |
Manipulation and Characterization of Aperiodical Graphene Structures Created in a Two-Dimensional Electron Gas | We demonstrate that Dirac fermions can be created and manipulated in a two-dimensional electron gas (2DEG). Using a cryogenic scanning tunneling microscope, we arranged coronene molecules one by one on a Cu(111) surface to construct artificial graphene nanoribbons with perfect zigzag (ZGNRs) or arm-chairedges and confi... | A Planar square stack coupled inductor coils on silicon substrate has been fabricated using MEMS technology. The fabrication process utilized a simple, cost effective process technique as well as CMOS compatible resulting to a reproducible and good controlled process. The basic characteristics of the coupled inductors ... | eng_Latn | 11,784 |
Charge accumulation and frequency characteristics of sequential tunneling. | This paper, as an addendum to Phys. Rev. B 46, 4714 (1992), provides a study of the finite frequency spectrum of noise current in sequential tunneling through double-barrier structures and the effect of space-charge accumulation | Using ultrafast optical-pump terahertz-probe spectroscopy, we study the THz dynamics and electronic cooling in few-layer epitaxial and CVD graphene; a microscopic theory of carrier-carrier and carrier-phonon interactions accounts quantitatively for the observed dynamics. | eng_Latn | 11,785 |
A novel reconfigurable multiband slot antenna fed by a coplanar waveguide using radio frequency microelectro‐mechanical system switches | Originally published Microwave Opt Technol Lett 53: 751–757, 2011. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53: 1685, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26162 ::: ::: ::: ::: (Original article DOI 10.1002/mop.25828) | Characteristic features of the d-band in electronic structure of transition metals are quite effective as descriptors of their catalytic activity toward oxygen reduction reaction (ORR). With the promise of graphene-based materials to replace precious metal catalysts, descriptors of their chemical activity are much need... | eng_Latn | 11,786 |
Fabrication of graphene with CuO islands by chemical vapor deposition. | Graphene prepared on Cu foil by chemical vapor deposition was studied as a function of post growth cooling conditions. CuO islands embedded in the graphene film were discovered and studied by scanning electron microscopy, atomic force microscopy, and X-ray photoemission spectroscopy. It is shown that nanostructured hol... | Microstructural studies and X-ray diffraction combined with pole figure characterizations have been carried out on the melt-grown YBa2Cu3O7-x and GdBa2Cu3O7-x samples. The crystallographic orientation of the domains in melt-grown samples are highlighted based on the above studies. | eng_Latn | 11,787 |
Tuning graphene nanoribbon field effect transistors via controlling doping level | By performing first-principles transport simulations, we demonstrate that n-type transfer curves can be obtained in armchair-edged graphene nanoribbon field effect transistors by the potassium atom and cobaltocene molecule doping, or substituting the carbon by nitrogen atom. The Dirac point shifts downward from 0 to −1... | The invention provides a TWDMPON uplink solution based on a tunable wavelength converter and a wavelength sharing method, comprising the tunable wavelength converter, a tunable optical filter and a circulator. The invention utilizes the tunable wavelength converter to uniformly convert an uplink time division multiplex... | eng_Latn | 11,788 |
Crystal defects in flux grown lithium ferrite, LiFe5O8 single crystals | With the increase of frequencies in microwave communications lithium ferrite single crystals attract growing interest. | Abstract In extension of an earlier note 1) we present some observations of different electric and magnetic switching phenomena in thin polycrystalline EuS film junctions. A possible explanation for qualitatively different nonllinearities of the current transport behavior in spite of very similar preparation conditions... | eng_Latn | 11,789 |
Microstructure of spray converted nanostructured tungsten carbide-cobalt composite | This paper reports the presence of face centered cubic cobalt precipitates inside tungsten carbide in nanocomposite of WC-Co synthesized by spray conversion processing. EDS was used to identify the presence and micro-diffraction was employed to determine the nature of the precipitates. There is entrapment of cobalt in ... | Abstract We propose a new model which simulates the motion of free electrons in graphene by the evolution of strings on manifolds. In this model, molecules which constitute sheets of graphene are polygonal point-like structures which build ( N + 1 ) -dimensional manifolds. By breaking the gravitational-analogue symmetr... | eng_Latn | 11,790 |
Magnetic properties of amorphous ribbon | The magnetic properties of transition-metal amorphous alloys are discussed, with emphasis on methods to increase the value of the saturation induction at room temperature, and on the factors that control the low-field magnetic properties that are important in most engineering applications. | We describe the first time on the direct and facile method for noble metal/graphene nanocomposites from graphite without reductants. In our system, the irradiant white-light instead of the chemical reductant exerts the influence on the synthesis of noble metal nanoparticles on graphene. Noble metal salts adsorbed on th... | eng_Latn | 11,791 |
Dynamical behavior of fractal structures | We present a scaling theory for the vibrational properties of tenuous fractal objects and a numerical calculation of the density of states for percolation clusters and diffusion-limited aggregates. A microscopic elastic Hamiltonian is used, which contains bending energy terms and properly describes the elasticity of su... | An introduction to the theoretical description of the optical properties of metal nanoclusters and nanostructures is presented, divided into two parts. The first part is devoted to the methodology, the most appropriate depending the system size: classical electrodynamics for large systems and quantum mechanics for smal... | eng_Latn | 11,792 |
Raman spectra of twisted CVD bilayer graphene | Abstract The Raman spectra of large-size, single-crystal, twisted bilayer graphene (tBLG) grains grown by chemical vapor deposition (CVD) are measured as a function of the rotation angle. The rotation angle between the graphene layers is determined using a combination of transmission electron microscopy (TEM) and selec... | Computational methods based on the solution of the flow model are widely used for the analysis of low-speed, inviscid, attached-flow problems. Most of such methods are based on the implementation of the internal Dirichlet boundary condition. In this paper, the time-domain panel method uses the piecewise constant source... | eng_Latn | 11,793 |
Nanoionics: ionic charge carriers in small systems. | Ion-conduction phenomena are discussed that are governed by interfacial effects. In a given material the density of interfaces is crucial in such cases. Particular emphasis is laid on situations in which the spacing of interfaces matters, even locally. These then observed mesoscopic phenomena are at the heart of what m... | The energy wasted in wireless networks is a serious concern and the main challenge lies in determining when and where the energy is wasted. In this demo, we present Energino, an energy measurement and control system designed to deliver high performance while remaining a cheap solution. | eng_Latn | 11,794 |
Graphene-Composite Carbon Nanofiber-Based Electrodes for Energy Storage Devices | Abstract : The goal of this research project is to develop highly conductive graphene composite carbon nanofiber (CNF) webs with an electrical conductivity larger than 1000 S/cm. In addition, metal-oxide-nanostructures on the surface of CNF webs will also be developed. These highly conductive and surface-modified CNF w... | We built a pulse compressor using a comb-like dispersion-profiled fiber (CDPF). The CDPF consists of 12-segment fibers with the dispersion alternatively high and low. Using this compressor and a 17 dBm Erbium-doped fiber amplifier, the 10 GHz, 12 ps pulses generated from an actively mode-locked Er3+ doped fiber ring la... | eng_Latn | 11,795 |
A class of high-selectivity microstrip transversal bandpass filter using non-resonating nodes | A new type of high-selectivity microwave planar bandpass filter is reported. It exploits the use of non-resonating nodes to generate the maximum number of inter-resonator electromagnetic (EM) couplings in a transversal configuration. Furthermore, it is exclusively shaped by parallel-coupled transmission-line segments, ... | We present molecular dynamics calculations on the evolution of Ni nanowires stretched along the (111) and (100) directions, and at two different temperatures. Using a methodology similar to that required to build experimental conductance histograms, we construct minimum crosssection histograms H(Sm). These histograms a... | eng_Latn | 11,796 |
Investigations of dual-frequency nematic liquid crystals doped with dichroic dye | ABSTRACTIn this work, we studied and analysed a particular variety of liquid crystals, the so-called dual-frequency nematic liquid crystals (DFNLCs). The interest was to perform dielectric spectros... | By performing first-principles transport simulations, we demonstrate that n-type transfer curves can be obtained in armchair-edged graphene nanoribbon field effect transistors by the potassium atom and cobaltocene molecule doping, or substituting the carbon by nitrogen atom. The Dirac point shifts downward from 0 to −1... | eng_Latn | 11,797 |
Raman Scattering of Type-I Clathrate Compounds | Rattling motion of a guest ion in type-I clathrate compounds has been studied by Raman scattering measurements. The anomalous energy-decrease of guest atom vibration has been observed for Sr 8 Ga 16 Si 30- x Ge x and Ba 8 Ga 16 Si 30- x Ge x as well as A 8 Ga 16 Ge 30 with decreasing temperature. This result shows that... | We present the design for the chalcogenide nanofiber coated with a thin finite tellurite cladding. The effects of the thickness of the tellurite coating on the dispersion and the nonlinearity of the nanofiber are studied. | eng_Latn | 11,798 |
INTERACTION OF DISLOCATIONS WITH ELECTRONS AND WITH PHONONS | Abstract : The interaction parameter, B, of moving dislocations with electrons and with phonons in aluminum was determined in the temperature range 10 degrees K to 250 degrees K. A new technique was developed for measuring ultrasonic attenuation changes, the change in alpha, as a function of a dynamic bias stress. The ... | The present invention relates to a battery (1) with integrated discharge circuit comprising a battery cell (2) comprising a positive pole and a negative pole, a transistor (3) which comprises a control contact and two switching contacts which, with its switching contacts between the positive pole and the negative pole ... | yue_Hant | 11,799 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.