Materials Literature
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Abstract Structural prediction and IR‐characteristic bands assignment of arginine‐containing tri‐ and tetrapeptides glycyl‐glycyl‐arginine ( GGArg ) and glycyl‐glycyl‐arginyl‐alanine ( GGArgAla ) have been carried out, using linear‐dichroic infrared (IR–LD) spectroscopy of oriented solid‐samples in a nematic liquid cr…
Sol–gel derived, as-deposited amorphous tungsten oxide (WO3) films become nanocrystalline with a pseudocubic triclinic structure upon annealing at 600 °C. The annealed films are constituted of nanorods along with interconnected nanoparticles and pores. While the high transmission modulation and colouration efficiency…
A highly sensitive thermoluminescence (TL) phosphor based on Ba1−xCaxSO4 : Eu (0 ≤ x ≤ 1) has been prepared using the chemical co-precipitation technique. It has been found that the TL sensitivity of the material changes on varying the value of x with the maximum coming at x = 0.03. For this value of x the sensitivity…
Abstract As a new biodegradable poly(ester carbonate), poly(butylene succinate‐ co ‐butylene carbonate) (PEC) is a random copolymer, which is composed of butylene succinate unit and butylene carbonate unit. The crystal structure, melting behavior, and morphology of PEC have been investigated by means of wide angle X‐r…
Vanadium alloys, candidate fusion reactor blanket materials, consist of intrinsic low activation elements for 14 MeV fusion neutrons (e.g. vanadium, chromium and titanium). From 500 to 1000 K, the tensile strength of vanadium alloys is independent of temperature, enabling the fusion blanket to be operated at least 100…
We have prepared planar fluidics devices using binary chemical patterns consisting of hydrophobic "roads" on which water droplets slide easily and more hydrophobic "curbs" that direct droplet motion. Contact angle and contact angle hysteresis both control the motion of liquid droplets on surfaces. The difference betwe…
The results of photoluminescence measurements on ZnO implanted with stable and radioactive isotopes of Zn and Ga are presented. The donor-related exciton feature ${I}_{8}$ at $3.3600\phantom{\rule{0.3em}{0ex}}\mathrm{eV}$ is suggested to be due to bound exciton recombination at Ga donors. The ${I}_{1}$ line at $3.3718…
Nanocrystalline δ-Bi 2 O 3 thin films have been deposited onto Si (100) and quartz substrates by reactive sputtering. The structural characteristics and thermal stability of the thin films have been investigated by x-ray diffraction and Raman spectra. It was found that the δ-Bi 2 O 3 thin films could exist stably belo…
Abstract Two new organically templated silver iodides, namely [(bmph)(Ag 5 I 7 )] n ( 1 ) and [(Hteda) 4 (Ag 12 I 16 )] n ( 2 ), have been synthesized with bmph 2+ and teda [bmph 2+ = 1,6‐bis(4‐methylpyridinio)hexane, Hteda = protonated triethylenediamine] as structure‐directing agents. Complex 1 consists of a one‐dim…
Microstructure and architecture of the scaffolds along with the surface chemistry exert profound effect on biological activity (cell distribution, proliferation, and differentiation). For the biological activity, scaffolds in tissue engineering have been widely designed. The objective of this study was to develop hydr…
Antisolvent crystallization is widely used in the production of pharmaceuticals. Although it has been observed experimentally that the crystal size distribution is strongly influenced by the imperfect mixing of the antisolvent with the solution, these effects have not been adequately quantified. In this work, a turbul…
We report a first-principles study of the energetics of hydrogen absorption and desorption (i.e. H-vacancy formation) on pure and Ti-doped sodium alanate (NaAlH4) surfaces. We find that the Ti atom facilitates the dissociation of H2 molecules as well as the adsorption of H atoms. In addition, the dopant makes it energ…
The prediction of ferromagnetism at room temperature in Co-ZnO thin films has generated a large interest in the community due to the possible applications. However, the results are controversial, going from ferromagnetism to non-ferromagnetism, leading to a large debate about its origin (secondary phase, Co clusters o…
By analyzing the dielectric nonlinearity with the Landau thermodynamic expansion, we find a simple and direct way to assess the importance of the eighth-order term. Following this approach, it is demonstrated that the eighth-order term is essential for the adequate description of the paraelectric-ferroelectric phase t…
We have investigated the in-plane thermal conductivity $κ_{ab}(T,H)$ of large single crystals of optimally oxygen-doped (Y$_{1-x}$,Sm$_{x}$)Ba$_{2}$Cu$_{3}$O$_{7-δ}$ ($x$=0, 0.1, 0.2 and 1.0) and YBa$_{2}$(Cu$_{1-y}$Zn$_{y}$)$_{3}$O$_{7-δ}$($y$=0.0071) as functions of temperature and magnetic field (along the c axis).…
The free energies of the FCC, BCC, HCP and Simple Cubic phases for hard spheres are calculated as a function of density using the Fundamental Measure Theory models of Rosenfeld et al (PRE 55, 4245 (1997)), Tarazona (PRL 84, 694 (2001)) and Roth et al (J. Phys.: Cond. Matt. 14, 12063 (2002)) in the Gaussian approximati…
We present an ab initio study of electronic correlation effects in a molecular cluster derived from the hexanuclear ferric wheel [LiFe6(OCH3)12-(dbm)6]PF6. The electronic and magnetic properties of this cluster have been studied with all-electron Hartree-Fock, full-potential density functional calculations and multi-r…
This paper has been withdrawn by the author(s), due to incompleteness.
Abstract Why do experiments detect Cosserat-elastic effects for porous, but not for stiff-particle-reinforced, materials? Does homogenization of a heterogeneous Cauchy-elastic material lead to micropolar (Cosserat) effects, and if so, is this true for every type of heterogeneity? Can homogenization determine micropola…
Nanoporous silica nanofibers have been employed as a matrix to encapsulate horseradish peroxide enzymes via a simple electrospinning method. A viscous solution of prehydrolyzed tetramethyl orthosilicate, beta-d-glucose, poly(vinyl alcohol), and enzymes were employed as spinning solution to generate porous fibers in th…