Materials Literature
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Abstract The structural, electronic, and elastic properties of hexagonal layered crystal MoS 2 under pressure are investigated using first-principles calculations within the local density approximation (LDA). The calculated lattice parameters a 0 , c 0 , and cell volume V 0 of MoS 2 are in good agreement with the avai…
ABSTRACT Vinyl ester/clay nanocomposites with 1, 3, and 5% nanoclay contents were prepared. X‐ray diffractography patterns and Scanning Electron micrographs showed that nanocomposites with the exfoliated structure were formed. Thermogravimetric analysis, water absorption test, and Tafel polarization method, respective…
ABSTRACT The starch/polyvinyl alcohol (PVA) bioblend sheets containing urea and formamide as plasticizers were prepared through melt processing in presence of water. The experiments indicated that urea and formamide plasticizers could form strong hydrogen bonds with starch/PVA molecules. Urea exhibited better plastici…
TiO2 nanofibers were prepared within polyvinylpyrrolidone (PVP) polymer using a combination of sol–gel and electrospinning techniques. Based on a Taguchi design of experiment (DoE) method, the effects of sol–gel and electrospinning on the TiO2/PVP nanofibers’ diameter, including titanium isopropoxide (TiP) concentrati…
The Ti–25Nb–3Zr–3Mo–2Sn (wt.%) alloy deforms primarily by {3 3 2}〈1 1 3〉 twinning with limited {1 1 2}〈1 1 1〉 twinning and stress-induced phase transformations. For the Ti–25Nb–3Zr–3Mo–2Sn alloy, the yield stress and strain hardening rate are independent of strain rate. It is found that adiabatic heating induced by hi…
Zinc oxide (ZnO) nanoparticles were chemically synthesized with cobalt doping and characterized through UV–visible spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) techniques. Cobalt doped ZnO nanoparticles were found to be crystalline having a single phase as…
BACKGROUND: The size and complexity of molecules being studied by single crystal diffraction is growing year by year, resulting in an increase in the difficulties encountered during structure determination. From the crystallisation itself and sample handling, to structure solution and refinement, specific problems due…
A series on nanocrystalline Fe100-xCrx alloys prepared by mechanical alloying was investigated with X-ray diffraction (XRD), scanning electron microscopy (SEM) and Mössbauer spectroscopy (MS) techniques. XRD and SEM were used to structurally characterize the samples whereas MS permitted phase analysis as well as deter…
The core theme of X-ray crystallography is reconstructing the electron density distribution of crystals under the constraints of observed diffraction data. Nevertheless, the reconstruction of electron density distribution by straightforward Fourier synthesis is usually hindered due to the well-known phase problem and…
In high magnetic fields, the exciton absorption spectrum of a semiconducting single-walled carbon nanotube splits as a result of Aharonov-Bohm magnetic flux. A magnetic field of 370 T, generated by the electro-magnetic flux compression destructive pulsed magnet-coil technique, was applied to single-chirality semicondu…
The van der Waals interfaces of molecular donor/acceptor or graphene-like two-dimensional (2D) semiconductors are central to concepts and emerging technologies of light-electricity interconversion. Examples include, among others, solar cells, photodetectors, and light emitting diodes. A salient feature in both types o…
Purpose – Spinning triangle is a critical region in the spinning process of staple yarn, which geometry influences the distribution of fiber tension and determines the qualities of yarn directly. Therefore, the purpose of this paper is to investigate the fiber tension distribution at the twist point. Design/methodolog…
Purpose – The purpose of this paper is to investigate the relationship between the formability of cotton and cotton/polyester woven fabrics and their selected properties: weft density, weave and a way of finishing. It shows how the mentioned properties influence fabric formability and analyze a statistical significanc…
We present the realization and optoelectronic characterization of p-n junctions based on two-dimensional semiconductors. Such junctions may be realized by lateral or vertical arrangement of atomically thin p-type and n-type materials. In particular, a WSe<sub>2</sub> monolayer p-n junction, formed by electrostatic dop…
We have investigated correlation between structural and electronic anisotropies in a parent compound of Fe-chalcogenide superconductor ${\mathrm{Fe}}_{1+\ensuremath{\delta}}\mathrm{Te}$ with $\ensuremath{\delta}=0.09$ by means of synchrotron x-ray diffraction and in situ in-plane resistivity anisotropy measurements wi…
We present a combined core-level spectroscopy and low-energy electron diffraction study of the evolution of thin CuI layers on graphene/Ni(111) during annealing. It has been found that the annealing of the CuI/graphene/Ni(111) system up to 160 °C results in the formation of an ordered CuI overlayer with a (√3 × √3) R…
Super-resolution surface-enhanced Raman scattering (SERS) imaging is used to map out SERS hot spots in aggregated silver nanoparticles labeled with the electrochemically-active probe molecule Nile Blue. In super-resolution SERS, the diffraction-limited emission from a SERS-active nanoparticle aggregate is fit to a 2-d…
Fluorescent analogues of the indole side chain of tryptophan can be useful spectroscopic probes of protein-protein and protein-DNA interactions. Here we present linear dichroism and solvent-dependent spectroscopic studies of two fluorescent analogues of indole, in which the organic C═C unit is substituted with the iso…
The size of dopant-rich nanodomains was assessed in four samples of Ce 1− μ Y μ O 2− μ /2 through systematic pair distribution function (PDF) refinements. Experimental G ( r ) curves were fitted by different structural models with the aim of finding a description which balanced precise structure parameterization and r…
During the past few years, 2D (two-dimensional) materials have found increasing attention in the electronic device community. The first 2D material studied in detail was graphene and many groups explored it as a material for transistors. During the early years of graphene research, the expectations on its impact on el…