Materials Literature
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Using UV-visible extinction spectroscopy and femtosecond pump-probe transient absorption spectroscopy, we have studied the effect of femtosecond laser heating on gold nanoparticles attached to DNA ligands via thiol groups. It is found that femtosecond pulse excitation of the DNA-modified nanoparticles at a wavelength…
Dual-stimuli-responsive surfaces are reported here that work under the external stimuli of temperature and/or pH, as demonstrated in the Figure: When the pH and/or temperature is varied, the contact angles (CAs) of the dual-responsive materials change reversibly. The general change in trend of wettability is that half…
Controlled release of an anti-inflammatory drug from PEDOT nanotubes using electrical stimulation is demonstrated (see Figure and Inside Cover). The fabrication process includes electrospinning of a biodegradable polymer into which the drug has been incorporated, followed by electrochemical deposition of the conductin…
A comprehensive simulation of the diimide hydrogenation process is carried out by taking into account the diimide generation reaction, the hydrogenation reaction, the side reaction between hydrogen peroxide and diimide, the disproportionation of diimide, and the diimide diffusion process. The relative magnitude of the…
Abstract Kohlenstoff‐Nanotubes und ‐fasern sind interessante Materialien für viele Anwendungen, angefangen von der Kunststofftechnik bis zur Katalyse. Bisher existiert aber noch kein technischer Herstellungsprozess. Die vorliegende Arbeit soll eine Übersicht über die Grundlagen der Synthese von Kohlenstoff‐Nanotubes u…
Abstract High‐temperature vulcanized silicone rubber was prepared by using allyl‐capped carbosilane dendrimers, in which the core molecules were Si(CH 2 CHCH 2 ) 4 and Ph 2 Si(CH 2 CHCH 2 ) 2 as crosslinker and nanoscale reinforcing filler, respectively. Allyl‐capped carbosilane dendrimers improved the mechanical pr…
The objective of this paper is to extend the framework of the continuum theory so that it can capture the properties that are embedded in the microstructure or nanostructure and still keep its simplicity and efficiency. The model thus developed is capable of accounting for local deformation of microstructures in solid…
Abstract We synthesized hyperbranched poly(phenylene sulfide) (HPPS) in a simple “one‐pot” way by condensation of potassium 2,4‐dichlorlbenzenthiol. The molecular masses ( M w ) of the polymers obtained under the conditions of this work were from 6 × 10 3 to 1 × 10 5 . XRD pattern indicated substantial loss in crystal…
The intermolecular interaction force of actin was studied by a dynamic light scattering technique. The mutual diffusion coefficients (D) of monomeric actin were accurately determined in a G-buffer with a low concentration of KCl from 0 to 10 mM. The translational diffusion coefficient was obtained as D(0) = (87 +/- 3)…
The phase transition behaviour of two 'nearly cubic' compositions, x = 0.40 and 0.43, of Sr(1-x)Ca(x)TiO(3), representative of Pbnm and Pbcm space group structures, has been investigated using temperature dependent dielectric, x-ray diffraction and Raman scattering techniques. For x = 0.40, a first order antiferroelec…
Universal stress proteins (USPs) are abundant and widely distributed proteins. Even so, their mode of function is hardly understood. This study focuses on UspG (UP12) of Escherichia coli, which belongs to the UspFG subfamily. Resolution of UspG by two-dimensional gel electrophoresis uncovered a posttranslational modif…
Electron-excited X-ray mapping is a key operational mode of the scanning electron microscope (SEM) equipped with energy dispersive X-ray spectrometry (EDS). The popularity of X-ray mapping persists despite the significant time penalty due to the relatively low output count rates, typically less than 25 kHz, that can b…
The synthesis and characterization of calcium carbonate microparticles by reaction of calcium chloride and ammonium bicarbonate in the presence of negatively charged phospholipid mixtures of negative and zwitterionic phospholipids has been reported. Negatively charged phospholipids influence the crystal morphology of…
The first far-infrared absorption spectra of manganite samples at pressures P up to 10 GPa were obtained on La1-xCaxMnO3-y by use of synchrotron radiation. For x=0.25 and 0.20 (y=0), P promotes partial metallization at room temperature through a strong reduction of the insulating gap. An x=0.20 sample with y=0.08 does…
In this work we investigate a variety of chemical and photoinduced processes in which different hydrogenous species including ${\mathrm{H}}_{2}$ molecules, ${\mathrm{H}}^{\ensuremath{-}}$ ions, and ${\mathrm{H}}^{0}$ atoms interact with the bulk of a complex nanoporous oxide $12\mathrm{CaO}∙7{\mathrm{Al}}_{2}{\mathrm{…
The static and dynamic magnetic properties of an $[{\mathrm{Fe}}_{13}]$ cluster were investigated using several experimental techniques. The cluster crystallizes in a cubic space group, but careful investigation of the crystallographic data revealed that the symmetry is distorted locally. dc magnetic susceptibility me…
Abstract Poly(methyl methacrylate) (PMMA) brushes are grown by surface‐initiated atom transfer radical polymerization on silicon surfaces at various polymerization temperatures. Kinetic studies show that the layer thickness scales linearly with the degree of polymerization of the polymers under some conditions, indica…
Abstract We studied the factors that influenced the molecular weights ( M w ) of water‐soluble methylcelluloses prepared from annual plants and juvenile eucalyptus. Miscanthus and cardoon stalks, and bleached pulps of abaca, jute, sisal, hemp, and flax were the annual plant materials studied. A higher concentration of…
Around the world, thousands of tons of polyurethane (PU) foam waste accumulate in municipal dumps from sources such as car disposal industries. Due to its low density and high volume, polyurethane foam waste is difficult to treat and dispose of in landfill. In this study, we developed a novel and environmentally frien…
Abstract The one‐pot synthesis of nanocomposites of a conductive poly( N ‐vinylcarbazole) (PVK) with CdS, Ag, Pd 50 –Ag 50 , and Pt 50 –Ru 50 nanoparticles was performed with γ irradiation in a tetrahydrofuran–water mixture (3/1 vol %). For comparison, the CdS, Ag, Pd 50 –Ag 50 , and Pt 50 –Ru 50 nanoparticles were al…