Materials Literature
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The direct growth of CdS nanocrystals in functional solid-state thermotropic liquid crystal (LC) small molecules and a conjugated LC polymer by in situ thermal decomposition of a single-source cadmium xanthate precursor to fabricate LC/CdS hybrid nanocomposites is described. The influence of thermal annealing temperat…
The thermo‐mechanical properties of a series of epoxy‐silica hybrid composites prepared through sol–gel process are evaluated in a manner that the effect of organic solvent on the formation of silica domains is highlighted. By means of infrared spectroscopy, small‐angle X‐ray scattering, scanning electron microscope,…
A series of in situ experiments on mechanisms and top-down LHHW (Langmuir–Hinshelwood–Hougen–Watson) microkinetic analysis were conducted for the partial oxidation of methanol on CuMnZn (ca. 28.0 wt % Cu, 23 wt % Mn, and 49 wt % Zn) catalyst. In comparison with CuZn (ca. 29 wt % Cu and 71 wt % Zn), CuMnZn catalyst wit…
We report the structural analysis of Na+ and Cs+ in sodium cesium silicate glasses by using 23Na and 133Cs magic-angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy. In the NMR spectra of cesium silicate crystals, the peak position shifted to higher magnetic field for structures with larger Cs+ coordinati…
In this work, we investigate the crystal anharmonic effects in the thermoelectric properties of n-type PbTe. The lattice thermal transport coefficient is computed by employing an isotropic continuum model for the dispersion relation for acoustic as well as optical phonon branches, an isotropic continuum model for crys…
We present a three-step metal-assisted chemical etching (MAE) texturing technique to fabricate nanoporous Si (MAE nSi). The relationship between the resulting surface morphology, optical properties, and surface recombination of the MAE nSi are presented and analyzed. We also show that the solar weighted reflectance (R…
Effect of lower ionic radii (Na and Nd) substitution in A-site on the structure, dielectric, ferroelectric and piezoelectric properties of SrBi4Ti4O15 (SBT) is investigated in this paper. The samples are prepared by solid state double sintering method and sol gel method based on pechini process. Substitution of smalle…
Abstract Fiber-reinforced composites have favorable structural characteristics such as their light weight, high specific strength, and high stiffness. Vacuum-assisted resin transfer molding (VARTM), used for manufacturing these composites, is relatively simple and provides materials with excellent mechanical propertie…
Poly p-phenylendiamine–SiO2 nanocomposite (PSC) was prepared by oxidative polymerization of p-phenylendiamine in hydrochloric acid with ammonium persulfate in the presence of SiO2 nanoparticles. The results of atomic force microscopy confirm that the surface is smoother for the case of epoxy/PSC/steel. The smoothness…
Porous silicon micro-particles (micro-pSi) with size in the range of 1–10 μm are obtained by etching of silicon wafers followed by sonication. The derivatization of the micro-pSi surface by wet chemistry (silylation and coupling with a diamine) yields an interface, which exposes negative (carboxylic) or positive (amin…
Thermoresponsive materials with a lower critical solution temperature (LCST) are receiving growing attention, of which examples of non-polymeric small molecules are limited. Monodisperse oligoethylene glycol amphiphiles that contain aromatic units with a LCST in water have been developed and applied to peptide extract…
We develop a theory for optical Faraday rotation noise in two-dimensional Dirac materials. In contrast to spin noise in conventional semiconductors, we find that the Faraday rotation fluctuations are influenced not only by spins but also the valley degrees of freedom attributed to intervalley scattering processes. We…
In this study, polyhydroxybutyrate (PHB) coated magnetic nanoparticles were prepared which are targetable to tumor cells in the presence of a magnetic field. The structural properties, functional groups, size distribution, and magnetic properties of the synthesized PHB coated magnetic nanoparticles were characterized…
Freezing and thawing of water in saturated concrete induces stresses, cracks, spalling, and eventually allows chlorides, sulphates and other ions to penetrate through the porous space of concrete causing the corrosion and ultimately structural failure. These detrimental factors are limited if concrete has the ability…
Gold nanoparticles (NGs) were modified by the aptamer (ssDNA) to prepare a NGssDNA probe for As3+. In pH 8.0 HEPES buffer solution containing 50 mmol L−1 NaCl, rhodamine 6G (Rh6G) molecules adsorbed on the NGssDNA sol substrate exhibited a strong surface-enhanced Raman scattering peak (SERS) at 1358 cm−1. Upon additio…
ABSTRACT Poly( l ‐lactide) (PLLA) nanofibers were prepared by melt extrusion of immiscible blends of PLLA/low density polyethylene (LDPE) and subsequent removal of the LDPE matrix from the blend fibers. The effect of blends composition and draw ratio on the phase structure of the blend fibers, crystallization, mechani…
Current-voltage (I–V) characteristics of the graphene field effect transistors (GFETs) are measured by the dc, fast I–V (FIV), and pulsed I–V (PIV) methods and analyzed. The hysteresis and conductance in the dc measurement are affected by the sweeping bias range and direction. The I–V curves measured by the FIV method…
The possibility of SbSI doping by bismuth, yttrium, lanthanum, neodymium and samarium cations during the synthesis in aqueous solution has been studied. The variation of SbSI unit cell volume in the case of bismuth and neodymium doping is proved by XRD analysis. The textures of bismuth doped material were grown by the…
Levanyuk-Sannikov model is used to describe the ferroelectric-paraelectric transition in bulk and confined sodium nitrite (NaNO2). It is found on the basis of this model that the phase transition of NaNO2 for the bulk material is weakly first order whereas for the confined material it is a second order transition. Cal…
Contaminants in water streams, in the form of oily/organic phases or nanoparticles, affect a large variety of activities, from laboratory practice up to environmental systems. To date, a large number of materials for the absorption and retention of these pollutants have been developed. Such materials, however, rarely…