Materials Literature
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Conformational changes in the intrinsic chemical structure of the polymer poly( N -vinyl-2-pyrrolidone) (PVP) in aqueous as well as (in)organic solvents essentially dictates the novel room temperature seedless synthetic procedure for the reduction of hydro-chloroauric acid (HAuCl 4 .3H 2 O) leading to the formation of…
Here, we investigate the combined effect of the nanoscale crystal grains and porosity on the lattice thermal conductivity of bismuth-telluride-based bulk alloys using both experimental studies and modeling. The fabricated bulk alloys exhibit average grain sizes of 30 < d < 60 nm and porosities of 12% &am…
Abstract The effect of clay and chain extender on the nonisothermal, isothermal crystallization kinetics, and morphology of polylactide (PLA) was investigated in this study. PLA and PLA‐based nanocomposites containing 2 wt% organoclay were prepared via melt compounding. Three commercially available chain extenders wer…
The structure and mechanical properties of tantalum mononitride (TaN) are investigated at high pressure from first-principles using the plane wave pseudopotential method within the local density approximation. Three stable phases were considered, i.e., two hexagonal phases (ε and θ) and a cubic δ phase. The obtained e…
Zinc-substituted cobalt ferrite nanopowders were prepared via a sol-gel route using citric acid as a chelating agent. The influence of zinc concentration on the microstructure, crystal structure, surface wettability, surface roughness, and antibacterial property of zinc-substituted cobalt ferrite nanopowders was inves…
Structural diversity and a variety of bonding schemes emerge as characteristics of the Li-B phase diagram in this ground-state theoretical investigation. We studied stoichiometries ranging from LiB(15) to Li(5)B, over a pressure range from 1 atm to 300 GPa. At P = 1 atm, stability is found for the experimentally known…
A novel conjugated asymmetric donor-acceptor (CADA) strategy for preventing the redshift in photoluminescence, as well as preserving the merits of donor-acceptor architectures, was proposed and demonstrated for two triazine derivatives, which showed highly efficient, narrow, and blueshifted ultraviolet light emission…
We present a scale-bridging approach for modeling the integral elasticresponse of polycrystalline composite that is based on a multi-disciplinary combination of(i) parameter-free first-principles calculations of thermodynamic phase stability andsingle-crystal elastic stiffness; and (ii) homogenization schemes develope…
CDDP is loaded into methoxypoly(ethylene glycol)-block-poly(L-glutamic acid) (mPEG-b-PLG), and a combination with iRGD is applied for NSCLC chemotherapy. The CDDP-loaded micelles show sustained cisplatin release in PBS, dose- and time-dependent inhibition to HeLa and A549 cell proliferation, and no apparent hemolysis…
Abstract Proteins have found their way into many of Nature’s structures due to their structural stability, diversity in function and composition, and ability to be regulated as well as be regulators themselves. In this study, we investigate the constitutive amino acids that make up some of these proteins which are inv…
A critical requirement for high gain and low noise avalanche photodiodes is the single-carrier avalanche multiplication. We propose that the single-carrier avalanche multiplication can be achieved in materials with a limited width of the conduction or valence band resulting in a restriction of kinetic energy for one o…
Electronic structure and optical band gap of CoFe2O4 thin films grown on (001) oriented LaAlO3 have been investigated. Surprisingly, these films show additional Raman modes at room temperature as compared to a bulk spinel structure. The splitting of Raman modes is explained by considering the short-range ordering of C…
Systematic measurements pertinent to the magnetocaloric effect and nature of magnetic transition around the transition temperature are performed in the 10 nm Pr0.5Ca0.5MnO3 nanoparticles (PCMO10). Maxwell's relation is employed to estimate the change in magnetic entropy. At Curie temperature (TC) ∼ 83.5 K, the change…
An extensive surface characterization of hydrofluoric acid (HF) etched and annealed SrTiO${}_{3}$ single crystals, vacuum-annealed below 300 ${}^{\ensuremath{\circ}}$C, reveals the formation of a two-dimensional electron gas (2DEG). A joint scanning tunneling spectroscopy and low-energy electron diffraction analysis a…
For blood vessel tissue engineering, an ideal vascular graft should possess excellent biocompatibility and mechanical properties. For this study, a elastic material of poly (L-lactic acid-co-ε-caprolactone) (P(LLA-CL)), collagen and chitosan blended scaffold at different ratios were fabricated by electrospinning. Upon…
A dipole–dipole reinforced copolymer hydrogel was synthesized by the one-step photopolymerization of vinylimidazole (VI) and acrylonitrile (AN) comonomer in the presence of a polyethylene glycol-based crosslinker. The mechanical properties of PVI–AN gels were tremendously increased by only chelating several mmol L−1 z…
The ac conductivity of bismuth zinc vanadate glasses with compositions 50V2O5. xBi2O3. (50-x) ZnO has been studied in the frequency range 10−1 Hz to 2 MHz and in temperature range 333.16 K to 533.16 K. The temperature and frequency dependent conductivity is found to obey Jonscher's universal power law for all the comp…
The preparation of superoleophobic and superhydrophobic surfaces requires surface microgeometries and surface chemistry. In this study, an economical and environmentally friendly electrochemical etching method was developed to prepare superoleophobic and superhydrophobic titanium surfaces. Scanning electron microscopy…
Density-functional calculations are carried out to investigate incommensurate magnetic structures and ferroelectric polarization in the newly discovered multiferroic material MnI${}_{2}$. The exchange interactions among local moments on Mn are parameterized by mapping the mean-field Heisenberg model on to the total en…
Chalcogenide materials have received great attention in the last decade owing to their application in new memory systems. Recently, phase-change memories have, in fact, reached the early stages of production. In spite of the industrial exploitation of such materials, the physical processes governing the switching mech…