Materials Literature
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We present an ab initio numerical many-body GW calculation of the band plot in freestanding graphene. We consider the full ionic and electronic structure introducing e-e interaction and correlation effects via a self-energy containing non-Hermitian and dynamical terms. With respect to the density-functional theory loc…
In nanosized pores, liquid water can be thermodynamically stable down to temperatures well below the limit of homogeneous nucleation of bulk water ( approximately 235 K). Studies of water in such pores therefore offer an opportunity to reveal the anomalous behavior of deeply supercooled water. Herein we focus on recen…
We report the first cellular level study on the biocompatibility and biosafety of ZnO nanowires (NWs). Hela cell line showed a complete biocompatibility to ZnO nanostructures from low to high NW concentrations beyond a couple of production periods. The L929 cell line showed a good reproduction behavior at lower NW con…
Dendritic polymers are highly branched polymer structures, with complex, secondary architectures and well-defined spatial location of functional groups. Due to their unique physical and chemical features, applications in areas such as targeted drug-delivery, macromolecular carriers, catalysis, sensors, light harvestin…
The splitting tensile test is an acceptable method for determining tensile strength at quasi-static strain rate. In the present paper, the experimental method on the dynamic splitting tensile test of ceramic is introduced based on the Split Hopkinson Pressure Bar (SHPB) test technique. In order to demonstrate the dyna…
The interest for continuous basalt fibers and reinforced polymers has recently grown because of its low price and rich natural resource. Basalt fiber was one type of high performance inorganic fibers which were made from natural basalt by the method of melt extraction. This paper discusses basic mechanical properties…
Polyimide (PI) is widely used in the aerospace and microelectronics industry and engineering due to its excellent electric and mechanical properties; however, the high thermal expansion of the PI causes the problem on the thermal expansion mismatching. A new type of PI with P-Phenylene diamine as diamine monomer is pr…
The influence of mechanical stresses accumulated in the thin films of porous silicon on the photoluminescence from porous silicon was investigated with micro-Raman spectroscopy. Under the 365 nm excitation, dark red photoluminescence was recorded only along the circular boundary of the silicon/porous silicon film. Wit…
Abstract The adsorption properties of Cu, Ag, Ni, and Pd atoms on O 2− , F, and F + sites of MgO, CaO, SrO, and BaO (001) surfaces have been studied by means of density functional calculations. The examined clusters were embedded in the simulated Coulomb fields that closely approximate the Madelung fields of the host…
The effect of polydispersity on nucleation in a metastable mixture of polydisperse polymer A and monodisperse polymer B is studied using self-consistent field theory. We adopt the continuous Schulz chain length distribution to describe the polydispersity of species A. The results show that the free energy barrier, as…
Abstract The preparation of three 2,6‐dipyrazolyl‐4‐X‐anilines, H(pz 2 An X ) (X = p ‐CF 3 , Cl, t Bu) using CuI‐catalyzed amination is described. Subsequent reactions of H(pz 2 An X ) with triphenylboron proceeds with benzene elimination to give the corresponding Ph 2 B(pz 2 An X ) compounds in high yields. The Ph 2…
Yttria-stabilized zirconia (YSZ) nanocrystals (NCs) have been synthesized by a nonhydrolytic sol–gel technique using the alkyl halide elimination reaction between the zirconium and yttrium isopropoxides and zirconium chloride in the oleylamine at 340 ° C . The grain growth behavior during heating of the agglomerated N…
Electronic structures of Mn-doped II-VI diluted magnetic semiconductors (DMSs) were studied by $\text{Mn}\text{ }2p$ core absorption (XAS), $\text{Mn}\text{ }2p$ core-level photoelectron (XPS), and $\text{Mn}\text{ }2p\text{\ensuremath{-}}3d$ resonance photoelectron spectroscopy (RPES). The $\text{Mn}\text{ }2p$ XAS,…
0.995[(K0.50Na0.50)0.94Li0.06]NbO3?0.005AETiO3 (AE=Ca, Sr, Mg, Ba) lead-free piezoelectric ceramics were prepared by normal sintering. The effects of the AETiO3 and poling temperature on the electrical properties of the ceramics were carefully studied, and the temperature stability of the electrical properties of the…
Abstract The Weibull distribution was successfully used to describe the diameter distribution of poly( N ‐isopropylacrylamide‐ co ‐methacrylic Acid (PNIPAAm‐MAA) nanoparticles, whereas the lognormal was deemed not adequate for that purpose. The method of moments was used to predict parameters of the Weibull distributi…
The synthesis of a naphthoquinone amino acid and its electrochemical characterization in a peptide is presented.
ABSTRACT Green asparagus was treated with different coatings (chitosan-beeswax, sodium caseinate-beeswax and SemperfreshTM) and evaluated for changes in fresh weight, sensory attributes, tiprot disorder and texture after a storage period of 14 days at 4C. Chitosan-beeswax significantly reduced fresh weight loss of asp…
This paper deals with the interaction of linear carbon chains (polyynes) with silver and gold surfaces in the form of nanometer-sized clusters. Surface-enhanced Raman signals have been detected revealing remarkable differences in the spectroscopic response between the two metals used for the enhancement. These differe…
This paper reports the preparation of optimal textured structures on silicon surfaces through metal-assisted etching using gold nanoparticles (Au NPs) as catalysts in HF/H 2 O 2 solution. The size and density of the NPs on the Si substrates were readily and rapidly determined using spectroscopic ellipsometry. We obtai…
Abstract Lithium tetraborate crystals have great demand due to its non‐critical phase matching at 90°. Transparent and good optical quality single crystals of undoped and Mn doped Li 2 B 4 O 7 were grown by Czochralski technique in air atmosphere. The crystalline phase was determined by X‐ray diffraction. Doping of Mn…