Materials Literature
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Suspended monolayer transition metal dichalcogenides (TMD) are membranes that combine ultralow mass and exceptional optical properties, making them intriguing materials for opto-mechanical applications. However, the low measured quality factor of TMD resonators has been a roadblock so far. Here, we report an ultrasens…
Two different growth modes of large-area hexagonal boron nitride (h-BN) film, a conventional chemical vapor deposition (CVD) growth mode and a high-pressure CVD growth mode, were compared as a function of the precursor partial pressure. Conventional self-limited CVD growth was obtained below a critical partial pressur…
We propose a polarization volume grating (PVG), which exhibits nearly 100% diffraction efficiency and large diffraction angle. Both reflective and transmissive PVGs can be configured depending on application preference. Such a PVG is polarization-sensitive so that it can split an incident unpolarized beam into two wel…
An osteoarthritis pandemic has accelerated exploration of various biomaterials for cartilage reconstruction with a special emphasis on silk fibroin from mulberry (Bombyx mori) and non-mulberry (Antheraea assamensis) silk worms. Retention of positive attributes of the agarose standard and nullification of its negatives…
Conjugated microporous polymers having thiophene building blocks (SCMPs), which originated from ethynylbenzene monomers with 2,3,5-tribromothiophene, were designedly synthesized through Pd(0)/CuI catalyzed Sonogashira-Hagihara cross-coupling polymerization. The morphologies, structure and physicochemical properties of…
Polyamides represent a very important class of polymers for a wide range of applications. After establishing in the 1930s with Nylon and Perlon, their impact on many branches has been continuously growing. In the context of developing sustainable polymers from renewable resources, many polyamides have meanwhile been d…
The broad-based implementation of thermoelectric materials in converting heat to electricity hinges on the achievement of high conversion efficiency. Here we demonstrate a thermoelectric figure of merit ZT of 2.5 at 923 K by the cumulative integration of several performance-enhancing concepts in a single material syst…
With the arising of global climate change and resource shortage, in recent years, increased attention has been paid to environmentally friendly materials. Trees are sustainable and renewable materials, which give us shelter and oxygen and remove carbon dioxide from the atmosphere. Trees are a primary resource that hum…
The effect of La on the diffusion of Nb in fcc Fe has been investigated using the first-principles calculations based on the density functional theory. The binding energies of Nb–vacancy, La–vacancy and La–Nb pairs have been calculated. The interactions of Nb–vacancy and La–Nb are attractive in 1nn and 2nn configurati…
The x-ray absorption spectra at the Bi-${L}_{1}$ and S-$K$ edges of ${\mathrm{LaO}}_{1\ensuremath{-}x}{\mathrm{F}}_{x}{\mathrm{BiS}}_{2}$ show a decrease of spectral weight close to the absorption thresholds upon F substitution for O, indicating a reduction of the unoccupied Bi $6p$ and S $3p$ states, as expected for…
In this article we made a theoretical study of a solar cell in parallel vertical junction under monochromatic illumination in static mode and under irradiation. The resolution of the continuity equation which governs the electron scattering process in the base help us to establish the electrons density expression and…
For the first time, a flower-like nanostructured CuS material was synthesised through a facile hydrothermal route using copper foil and brenstone as Cu and S sources, respectively. The obtained CuS was characterised by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy and transmission e…
Ceramic proppants are determined as material designed for hydraulic fracturing in the shale gas industry. Shale formation is fractured due to pumping the fracturing fluid including proppants into the unconventional well. Ceramic granulates set in the newly created fissures act as a prop and permit the shale gas of flo…
We report on the characterization of silica aerogel thermal optical nonlinearity, obtained by z-scan technique. The results show that typical silica aerogels have nonlinear optical coefficient similar to that of glass (≃10−12 m2/W), with negligible optical nonlinear absorption. The nonlinear coefficient can be increas…
Over the past few years, various valleytronic properties have been predicted in graphene like $p$-electron honeycomb structures with staggered sublattice onsite potential; however, most of these studies are based on model calculations, and direct studies on real materials are still rare. In this paper, we propose an e…
The influence of the photopolymerisation conditions during the formation of the blue phases (BPs) of the polymer-stabilised liquid crystal is reported. The reactive mesogen monomers (RMM) with various concentrations were added to the highly chiral thermotropic liquid crystal, which initially possesses a narrow tempera…
Sonochemical synthesis can lead to a dramatic increase in the kinetics of formation of polymer spheres (templates for carbon spheres) compared to the modified Stöber silica method applied to produce analogous polymer spheres. Reactive molecular dynamics simulations of the sonochemical process indicate a significantly…
We present a comprehensive study of synthesis, structure analysis, transport and thermodynamic properties of the C14 Laves phase Ta(Fe1-xVx)2. Our measurements confirm the appearance of spin-density wave (SDW) order within a dome-like region of the x - T phase diagram with vanadium content 0.02 < x < 0.3. Our results…
The effect of postgrowth thermal annealing on ZnO /ZnCr 2 O 4 nanocomposites synthesized by hydrothermal method has been thoroughly investigated. XRD data have clearly revealed the transformation of spinel cubic phase of ZnCr 2 O 4 to wurtzite phase ZnO and indicated the incorporation of Cr in ZnO lattice with anneali…
BiFeO3 (BFO) ultrathin films with nominal thicknesses from 2 to 12 nm were grown with a SrRuO3 (SRO) buffer layer on TiO2-terminated (001) SrTiO3 (STO) substrates using pulsed laser deposition. The surface morphologies and domain configurations of the thin films were investigated using atomic force microscopy and piez…