Materials Literature
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We calculate the tunneling conductance of a graphene normal metal-insulator-superconductor (NIS) junction with a barrier of thickness $d$ and with an arbitrary voltage ${V}_{0}$ applied across the barrier region. We demonstrate that the tunneling conductance of such a NIS junction is an oscillatory function of both $d…
Several highly emissive, crystalline salts (ClO 4 -, PF 6 -, BF 4 -, B(C 6 F 5 ) 4 -, and tfpb -; B(C 6 F 5 ) 4 - = tetrakis(pentafluorophenyl)borate; tfpb - = tetrakis(bis-3,5-trifluoromethylphenylborate) of the Ru(pp) 3 2+ (pp = bpy (2,2‘-bipyridine), phen (1,10-phenanthroline) or 4,7-Me 2 phen (4,7-dimethyl-1,10-ph…
All together now: Five subcomponents (see scheme) come together cleanly with CuI to form simultaneously all four product structures shown. Simply by changing the stoichiometry, any given subset of product structures is accessible. To explain the observed selectivity, it is necessary to consider the stability not only…
An ab initio-based model of the temperature-induced ferroelectric phase transition in Sn2P2S6 (SPS) as a prototype of an unconventional ferroelectric is developed. The order parameter in SPS is found as the valley line on a total-energy surface of the zone-center fully symmetrical Ag and polar Bu distortions. Signific…
This study measured the clothing adjustment factors (CAFs) for four clothing ensembles (Cotton Coveralls, Tyvek 1427 Coveralls, NexGen Coveralls, and Tychem QC Coveralls; all coveralls were worn without hoods) against a baseline of cotton work clothes to determine whether the CAFs would be affected by the metabolic ra…
The Joule-heating-induced vacuum breakdown of the carbon nanotube (CNT) yarns was studied. Wall-by-wall breakdown and superplastic deformation of CNTs are the main physical processes at the hottest location before breakdown. The two ends at the breaking point are needle-shaped with surfaces rich in tightly compacted c…
Density functional theory is employed to study structure and stability of small neutral vanadium oxide clusters in the gas phase. BPW91/LANL2DZ level of theory is used to obtain structures of VOy (y=1-5), V2Oy (y=2-7), V3Oy (y=4-9), and V4Oy (y=7-12) clusters. Enthalpies of growth and fragmentation reactions of the lo…
Most challenging in the development of DNA sensors is the ability to distinguish between fully complementary target ssDNA (single-strand DNA) and 1-mismatch ssDNA. To deal with this problem, we performed impedance spectroscopy on DNA-functionalized nanocrystalline diamond (NCD) layers during hybridization and denatura…
The thermoelectric material Zn 4 Sb 3 was mercury doped by introduction of 1 at. % Hg into the synthesis mixture, resulting in Hg 0.04 Zn 3.96 Sb 3 . The doped compound and an undoped reference were characterized by multitemperature short wavelength synchrotron X-ray powder diffraction, SEM/EDX, differential scanning…
In this topical review, we outline the construction of a reflection high-energy electron diffraction (RHEED) surface pole figure from a polycrystalline film by recording multiple RHEED patterns as the substrate is rotated around the surface normal. Due to the short penetration depth of electrons, the constructed pole…
The effect of Nb doping on the electrochromic properties of WO3 thin films is investigated. The systematics of different properties such as the structural phase change, the colour-bleach kinetics, colouration efficiency, reversibility, stability, ion insertion/extraction capacity and change in charge states from W+6 t…
The barnacle relies for its attachment to underwater foreign substrata on the formation of a multiprotein complex called cement. The 20 kDa cement protein is a component of Megabalanus rosa cement, although its specific function in underwater attachment has not, until now, been known. The recombinant form of the prote…
ZnO doped with Co2+ has been prepared by a Pechini process and investigated in terms of crystallographic structure and UV-visible properties. We emphasize for the first time a splitting of the ZnO band gap in two "sub-band gaps" (never clearly mentioned until now) which is fully interpreted basing on the iono-covalent…
Structural and compositional changes in the Li−Mg−N−H system have been studied by probing the pressure composition isotherms at different hydrogenation/dehydrogenation stages. The results of X-ray diffractometry and Fourier transform infrared spectroscopy show that LiNH 2 and a ternary imide with the composition Li 2…
Abstract Single crystals of L‐Tyrosine hydrochloride were grown by using the submerged seed solution method. The grown crystals were characterized by using single crystal X‐ray diffraction. Functional groups and the modes of vibrations were identified by FTIR spectroscopy. The TGA/DTA studies showed that the crystal i…
We report a joint experimental/theoretical study of a series of group IV atom-doped gold anion clusters MAu 16 - (M = Si, Ge, Sn). We find that their global minima possess exohedral structures, which are dominated by the strong M−Au local interactions reminiscent of the MAu 4 clusters. In particular, a dangling Au ato…
A hydrophobic compound, which we name 3C18-Azo, containing an azo head and three 18 C alkyl chains has the capacity to form an amphiphile by capping it with a cyclodextrin (CD) by inclusion complexation. The amphiphilic compound self-assembles into vesicles in water. Optical switching of the assembly and disassembly i…
Review of techniques for characterizing piezoelectric/electrostrictive material for transducer applications.
An unprecedented asymmetrically modified bivanadium-capped Keggin polyoxometalate (POM), {AsMo12O40(VO)[VO(H2O)]}.[Cu(4,4'-bipy)]5.H2O (1) (bipy = bipyridine), has been hydrothermally synthesized and structurally characterized by a routine technique. Single-crystal X-ray diffraction analysis reveals that compound 1 ex…
In situ transmission electron microscopy observations are reported of the dynamic process of twin boundary migration in Cu with nanoscale twins. The experiment provides the first direct evidence of twin boundary migration via Shockley partial dislocation emission from the twin boundary/grain boundary intersections, an…