Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Aggregation, occurring in the preparation of atomic force microscopy samples, usually results in difficulties for morphologic observation and nanosheet-thickness analyses of the reduced graphene oxide nanosheets prepared by chemical reduction of exfoliated graphite oxide. In this paper, a simple method, primarily base…
We report on the fabrication and characterization of solar blind Metal-Semiconductor-Metal (MSM) based photodetectors for use in the extreme ultraviolet (EUV) wavelength range. The devices were fabricated in the AlGaN-on- Si material system, with Aluminum Gallium Nitride (AlGaN) epitaxial layers grown on Si(111) by me…
The structure and stability of clusters Ag(n)O+(m), Ag(n)O(m), and Ag(n)O(m)- (n = 1-6, m = 1-2) are studied by using the first-principles method. Calculated results show that the properties studied are strongly dependent on the size and charge state of the clusters, some of which show the odd-even alteration. General…
Transmission Electron Microscopy (TEM) investigations of graphene layers synthesized on Si and C-terminated on-axis oriented 4H-SiC are presented. The high-resolution TEM (HRTEM) revealed distinctive distance differences between the first carbon graphene layer and SiC surface for both polarities. The prolonged anneali…
The adsorption of benzoic acid on both sodium and calcium montmorillonites has been studied by near infrared spectroscopy complimented with infrared spectroscopy. Upon adsorption of benzoic acid, additional near-infrared bands are observed at 8665 cm−1 and assigned to an interaction of benzoic acid with the water of h…
Formation of modulated phase patterns can be modelized by a modified Cahn–Hilliard equation which includes a non-local term preventing the formation of macroscopic domains. Using stationary solutions of the original Cahn–Hilliard equation as analytical ansatzs, we compute the thermodynamically stable period of a 1D mo…
The use of hydrogen-bonding β-strand peptidomimetics for the preparation of supramolecular polymers is described here. The β-strand mimics were selected for their ability to form hydrogen bonds on only one face of the strand, allowing for controlled assembly into linear polymers. Alkyne-functionalized peptidomimetics…
This study focuses on combining traditional polymeric materials with nanoclays to engineer new composite monofilaments for nontraditional industries using extrusion process. Polypropylene/nanoclay composite monofilaments were produced using single screw extruder, and the structure and properties of new monofilaments w…
Epitaxial graphene was grown on the surface of on-axis and off-axis SiC (0001) by solid state graphitization at high temperatures (2000 °C) in Ar ambient. The effect of the miscut angle on the lateral uniformity of the few layers of graphene (FLG) was investigated by combined application of micro-Raman spectroscopy an…
Single-crystalline K2Ti6O13 ring-like structures have been synthesized via a simple molten salt method without any templates and surfactants. The annular structures have several different types, such as nanoring, wheel-like and diskette-like ring. Each type of rings was characterized individually by scanning electron…
Novel SrNb 2 O 6 nanotubes with rhombic cross sections were produced via a facile hydrothermal route without any surfactants or templates by controlling the reaction conditions, such as the pH value and temperature. The prepared nanotubular powders were characterized using X-ray diffraction, field-emission electron mi…
We have tried to apply the oxidation model of SiC proposed previously, termed ‘Si-C emission model’, to the oxide growth rate at various oxidation temperatures. We have found that the model well reproduces the oxide thickness dependences of oxide growth rates for all of the temperatures measured for both of the SiC Si…
In this report we review how intrinsic drawbacks of epitaxial graphene on SiC(0001) such as n-doping and strong electronic influence of the substrate can be overcome. Besides surface transfer doping from a strong electron acceptor and transfer of epitaxial graphene from SiC(0001) to SiO2 the most promising route is to…
Few Layers Graphene (FLG) films were grown on the carbon-terminated surface of 4H-SiC from nickel silicide supersaturated with carbon. The process was realised by annealing of thin Ni films deposited on silicon carbide followed by wet processing to remove the nickel silicide. To identify and characterize the fabricate…
Abstract The XPS technique was applied to study Au deposition on defect‐rich MgO(100) surfaces in a coverage range of 0.2–5 Au monolayers. Three MgO surfaces were used with increasing concentration of surface defects as determined based on surface composition and modified Auger parameter: air‐cleaved, ultrahigh‐vacuum…
5-Hydroxy-1,3-diketonate ligands have been found to stabilize dimeric complexes and tetrameric lanthanoid clusters dependent on the degree of steric bulk provided by the presence or absence of a methoxy group. Treatment of (R/S,Z)-1'-hydroxy-3-(hydroxy(phenyl)methylene)bi(cyclopentan)-2-one (Hhpb) and the p-methoxyphe…
Abstract The effect of polyaniline and polypyrrole composites and the influence of type and concentration of stabilizer, pH of solution, and type of adsorbent on lead salt removal from aqueous solution were studied. The results indicated that the extents of removal of lead in alkaline solution (pH = 10) were 99.95 and…
We report on the synthesis of organic dye-metal nanoparticle hybrids from two thiol-derivatized perylenediimide (PDI) ligands and 1.5 nm gold nanoparticles. The hybrids form spherical nanostructures when cast from 40% methanol/chloroform solution and toluene. The spherical aggregates are in the size range 50-230 nm in…
Borofloat ® (borosilicate 8330) glass is an important type of inorganic glass, both scientifically and commercially. During prolonged heat treatment of this glass above its glass transition temperature of 525°C, heterogeneous nucleation, and growth of cristobalite crystals occur. The kinetics and morphology of this cr…
The phonon frequencies of epitaxial graphene on silicon carbide (SiC) depend on mechanical strain and charge transfer from the substrate to the epitaxial layer. Strain and doping depend on the preparation process and on the number of graphene layers. We measured the phonon frequencies by Raman spectroscopy and compare…