Materials Literature
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Polyurethane (PU) is widely used to make artificial heart and blood vessel wells; however, its thrombogenicity in vivo is still in question. The biomembrane-mimetic and water-soluble polymers, poly (2-methacryloyloxyethyl phosphorylcholine-co-n-butyl methacrylate) (PMB), were used to modify polyurethane (PU) surfaces…
L-Valine-based oligopeptides with the general structure Z-(L-Val)(n)-OMe or -OH (n = 1-4) form stable organogels in a variety of solvents, including the inorganic liquid tetraethylorthosilicate. The acid form Z-(L-Val)(n)-OH is a less efficient gelator than the methyl ester, but forms stable organogels in aromatic sol…
Functional core—shell structured composite nanofibers were prepared by electrospinning two polymer solutions in a coaxial system. The core—shell structured nanofibers were comprised of varying concentrations of polyurethane (PU, shell) and a Nylon-6 (core). The resultant nanofibers were characterized by means of scann…
The glass transition temperature Tg of 100 kinds of glassy alloys can be expressed as a function of their valence electron concentration (VEC): Tg=131VEC+57 for metal/metal bonding type and Tg=−236VEC+2375 for metal/metalloid bonding one. The electron valences of the constituent elements of the glassy alloys are somew…
Improved single-phase nanocrystalline BaTiO3 powders may be prepared at 700°C by the sol-gel acetate process to which 1–3wt% Sb is added as dopant. Following calcination at 1200°C, the resulting average particle size as determined by scanning electron microscopy analysis is in the range of 50–150nm. The dielectric res…
Optical tuning of photonic defect modes in cholesteric liquid crystals is demonstrated based on a contrast in the pitch length. Two-photon laser lithography was performed in a cholesteric helix to leave an unpolymerized region in the center to act as a structural defect. The unpolymerized region was then substituted b…
High-energy (40keV) electrons, scattering over large angles, transfer a small fraction of their kinetic energy to the target atoms, in the same way as ions do in Rutherford backscattering experiments. The authors show here that this energy transfer can be resolved and used to determine the mass of the scattering atom.…
Biominerals are characterised by unique morphologies, and it is a long-term synthetic goal to reproduce these synthetically. We here apply a range of templating routes to investigate whether a fascinating category of biominerals, the single crystals with complex forms, can be produced using simple synthetic methods. M…
Poly(hydroxyalkanoate)s (PHAs) are a class of microbially synthesized polyesters that combine biological properties, such as biocompatibility and biodegradability, and non-bioproperties such as thermoprocessability, piezoelectricity, and nonlinear optical activity. PHA monomer structures and their contents strongly af…
This letter reports a strong yellow emission of Y3Al5O12:Ce3+ (YAG:Ce) mixed with ZnS:Ag,Cl under electron excitation. The penetration depths of electron of 1keV and photon of 2.7eV in YAG:Ce were estimated to be approximately 1450Å and 4.65mm, respectively. Deeper penetration of blue light from ZnS:Ag,Cl helps to exc…
Mg-metal hydride systems are potential hydrogen storage media and might be used in hydrogen switchable mirrors. However, absorption kinetics are too slow even with appropriate catalysts. The authors demonstrate the enhancement of the formation of MgH2 by an electric current, thus enabling the hydrogenation of Mg witho…
The authors report on resonant energy transfer of nonequilibrium excitons in an amorphous polyfluorene donor CdSe∕ZnS core-shell nanocrystal acceptor system. By time-resolved photoluminescence (PL) spectroscopy, they have investigated the PL decay behavior of the primarily excited polyfluorene in dependence of the con…
Fluidic aligned submicrometer patterns of acid-treated carbon nanotubes (CNTs) on polydimethysiloxane (PDMS) were transfer printed onto nonflat patterned Au electrodes modified with a self-assembled monolayer (SAM) of 11-amino-1-undecanethiol. The CNT bundles can be transferred in a few seconds at ambient temperature…
As model compounds for nanosize carbon clusters, the phonon dispersion curves of polyacene are constructed based on density functional theory calculations for [n]oligoacenes (n=2-5, 10, and 15). Complete vibrational assignments are given for the observed Fourier-transform infrared and Raman spectra of [n]oligoacenes (…
We consider the possibility of a complete real-time analysis of the polarization state of light using two types of polarization-holographic grating that decompose the light analyzed into orthogonal circular and orthogonal linear bases. It is shown that it is possible to determine the ellipticity, the direction of rota…
Marine-derived collagen is expected to be a much safer alternative to calf collagen, which in medical applications carries the risk of bovine spongiform encephalopathy. In this study, acid-soluble collagen was extracted from salmon skin and crosslinked with 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide during fibril…
Silicon carbide nanotubes have a great potential for biological applications. It is of interest to explore the electronic properties of these nanotubes, and how those are modified in the presence of impurities. Hydrogen is a common impurity that can appear during the growth of silicon carbide nanotubes or in the envir…
A series of Zn-doped CuAlS2 bulk samples was synthesized by spark plasma sintering, and the CuAl0.90Zn0.10S2 film was prepared on a glass substrate by channel spark ablation. Their electrical and optical properties were carefully investigated. A sharp increase in conductivity due to the enhancement of both Hall mobili…
Investigations of the structures and electronic properties of neat single crystals of the organic metals $\ensuremath{\Theta}\text{\ensuremath{-}}{(\mathrm{BEDT}\text{\ensuremath{-}}\mathrm{TTF})}_{2}{\mathrm{I}}_{3}$ and ${\ensuremath{\Theta}}_{\mathrm{T}}\text{\ensuremath{-}}{(\mathrm{BEDT}\text{\ensuremath{-}}\math…
AHL1 (AT-hook Motif and Nucleus Localized protein 1) is a protein localizing at the nuclear matrix and originally identified in Arabidopsis thaliana by using a random GFP-cDNA fusion method.1 A. thaliana AHL1 (AtAHL1) consists of an AT-hook motif and PPC domain (Plants and Prokaryotes Conserved domain). It was reveale…