Materials Literature
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The electrochemical behavior of polyferrocenyldimethylsilane (PFDMS) films and polyferrocenylmethylphenylsilane (PFMPS) films deposited on a glassy carbon electrode in 1.0 M aqueous LiClO 4 was investigated by means of cyclic voltammetry (CV). The influences of supporting electrolyte concentration, temperature, film t…
The refueling time and safe hydrogen storage are critical factors in the development of a hydrogen economy for transportation. The finding of a fast and high-capacity H 2 storage material represents a worldwide challenge. The short-term target of the U.S. Department of Energy for a hydrogen storage material is a 4.5 w…
The whole polyhydroxyalkanoate (PHA) synthesis gene locus of Pseudomonas stutzeri strain 1317 containing PHA synthase genes phaC1Ps, phaC2Ps and PHA depolymerase gene phaZPs was cloned using a PCR cloning strategy. The sequence analysis results of the phaC1Ps, phaC2Ps and phaZPs showed high homology to the correspondi…
The usefulness of the hybrid materials of nanoparticles and biological molecules on many occasions depends on how well one can achieve a rational design based on specific binding and programmable assembly. Nonspecific binding between nanoparticles and biomolecules is one of the major barriers for achieving their utili…
Capillary crystallization techniques and thermal microscopy have been used to identify and characterize a metastable polymorph of metformin hydrochloride. The single crystal structure of the metastable polymorph (Form B) is reported and compared to the known thermodynamically stable form (Form A). There is a 5.8% dens…
The effect of the plasma on heating the growth substrate in plasma enhanced chemical vapor deposition (PECVD) of carbon nanotubes is characterized for the first time. This effect, which is commonly ignored in the nanotube/nanofiber literature, is the sole heating mechanism in this work for catalyst pretreatment and gr…
Planar field effect transistors (FET) consisting of a large number of parallel single-walled carbon nanotubes (SWCNT) have been fabricated that allow very high on-currents of the order of several milliamperes and on/off ratios exceeding 500. With these devices it is demonstrated, for the first time, that SWCNTs can be…
Control and optimization of the polymorph formation in batch crystallization processes require in-situ quantitative measurement of the concentration of different polymorphs. In this study, Raman spectroscopy was chosen to measure the polymorphic fraction of l -glutamic acid ( l -Glu) in suspension. A sufficiently accu…
We demonstrate a scheme for optically patterning nuclear spin polarization in semiconductor/ferromagnet heterostructures. A scanning time-resolved Kerr rotation microscope is used to image the nuclear spin polarization that results when GaAs/MnAs epilayers are illuminated with a focused laser having a Gaussian profile…
There is great interest in the development of novel nanomachines that use charge, spin, or energy transport, to enable new sensors with unprecedented measurement capabilities. Electrical and thermal transport in these mesoscopic systems typically involves wave propagation through a nanoscale geometry such as a quantum…
The results of computer simulations of light scattering by a random array of small particles is presented. Results are given for arrays of particles situated randomly in a cubic, 3D sample $1.6μ$ on a side with particle numbers ranging from 100 to 937. The material parameters used correspond to ZnO and Ag, over the wa…
A simple and efficient approach is developed for the synthesis of copper oxide nanorods with different morphology and crystallographic structure. Polycrystalline fine rods 10−20 nm thick and several hundred nanometers long and single crystalline thick rods 60−100 nm thick and up to 1 μm long were obtained from the rea…
Quicklime or burnt lime (CaO), is a highly soluble liming material recognized as an acceptable means for neutralization of acid soils in the United States. Blending CaO and MgO with agricultural lime (CaCO3) may prove an alternative to ground agricultural limestone for raising soil pH and providing fertilizer Ca and M…
The use of intermetallic alloy precursors is explored as a new means to synthesize complex transition and refractory metal nitrides, carbides, and related phases. The conditions under which model single-phase Cr 3 Pt and two-phase Cr 3 Pt-dispersed Cr alloys form Cr 3 PtN antiperovskite when thermally nitrided were st…
Abstract The permeation, diffusion, and sorption of dimethyl ether into a series of commercial fluoroelastomers were characterized at various pressures and temperatures. The polymers under study were based on tetrafluoroethylene and contained various amounts of other perfluorinated monomers: perfluoromethylvinylether,…
Extensive studies on lipase catalyzed polymerization of ϵ‐caprolactone showed that porcine pancreas lipase (PPL) gave good conversions and molecular weights of the order of 11,000. Various attempts were also made to prepare higher molecular weight polycaprolactone esters and to increase the molecular weights of polyca…
We present and compare the results of temperature-dependent electron paramagnetic resonance (EPR) studies on Pr 1− x Ca x MnO 3 for x = 0.64, which is electron-doped, with results of studies on the hole-doped, x = 0.36 composition. The temperature dependence of the various parameters obtained from the powder and singl…
The effect of perfluoroalkane sulfonic acid on the flame retardancy of polycarbonate (PC) has been studied. In particular, the very small amount of additives to restrain the combustion, as well as the thermal degradation path, was focused on. The flaming combustion times of PC blended with 100 ppm of the strong acid s…
The title compound, dilanthanum dihydrogen hexamolybdoplatinate(IV) hexadecahydrate, La2[H2PtMo6O24]·16H2O, was obtained by reacting La(NO3)3·6H2O with a sodium salt solution of [HnPtMo6O24](8−n)− at pH 2.0, and it was found to crystallize in the monoclinic system in space group C2/c, with the polyanion having the le…
1,4-Anhydroerythritol ( 1a ) and 1,4-anhydro- l -threitol ( 1b ) were polymerized using trifluoromethanesulfonic acid (CF 3 SO 3 H) or fluorosulfonic acid (FSO 3 H) as a cationic initiator. The polymerizations of 1a and 1b proceeded through a ring-opening reaction with a proton-transfer reaction to produce hyperbranch…