Materials Literature
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Pb 0.3 Sr 0.7 TiO 3 ( PST 30 ) thin films were synthesized on platinized silicon (Pt∕Si) and lanthanum aluminate (LAO) substrates using chemical solution deposition technique. The films on LAO substrate were highly (100) oriented, whereas the films on Pt∕Si substrate were polycrystalline. The low dielectric loss in th…
The energy barrier for hydride transfer in wild-type G121V and G121S variants of Escherichia coli dihydrofolate reductase (DHFR) fluctuates in a time-dependent manner. This fluctuation may be attributed to structural changes in the protein that modulate the site of chemistry. Despite being far from the active site, mu…
Reaction of the preorganized strands of ([Cu(II)(mu-4,4'-bpy)](2+))n (4,4'-bpy = 4,4'-bipyridine) with [W(V)(CN)(8)](3)(-) leads to a novel cyano-bridged Cu(II)(3)W(V)(2) complex [Cu(mu-4,4'-bpy)(DMF)(2)][Cu(mu-4,4'-bpy)(DMF)](2)[W(V)(CN)(8)](2).2DMF. 2H(2)O 1. The structure of 1 consists of the expected 2-dimensional…
The evolution of the degree of substitution during the transformation of both amorphous and crystalline domains of cellulose during carboxymethylation in systems consisting of ethanol/benzene mixtures is properly described by a pseudo-first-order kinetic equation with a higher reaction rate for less ordered regions. I…
We present monolithically integrated high-density arrays of artificial hairs for flow pattern measurements based on drag force. A combined bulk/surface micromachining process has been developed to integrate the artificial hairs with capacitive read-out. First fabrication results show the possibility to fabricate out-o…
According to SECA program guidelines, solid oxide fuel cells (SOFC) are produced in the form of 3-10 kW modules for residential use. In addition to residential use, these modules can also be used in apartment buildings, hospitals, etc., where a higher power rating would be required. For example, a hospital might requi…
The well-known Rayleigh-Plesset ( RP ) equation is the basis of almost all hydrodynamical descriptions of single-bubble sonoluminescence ( SBSL ). A major deficiency of the RP equation is that it accounts for viscosity of an incompressible liquid and compressibility, separately. By removing this approximation, a new m…
Polycrystalline Sr2Fe1−xAlxMoO6 compounds with x=0, 0.05, 0.10, 0.15, and 0.30 were fabricated and their low-field magnetoresistance (LFMR) performance studied. The LFMR was greatly enhanced as x increased from nil to 0.15, and its origin was found to be intragranular spin-dependent scattering. The replacement of Fe b…
The DNA polymerase I from Thermus aquaticus (Taq polymerase) performs lagging-strand DNA synthesis and DNA repair. Taq polymerase contains a polymerase domain for synthesizing a new DNA strand and a 5'-nuclease domain for cleaving RNA primers or damaged DNA strands. The extended crystal structure of Taq polymerase pos…
Indium tin oxide films produced by reactive middle frequency magnetron sputtering were annealed in a vacuum. The electrical and optical properties of the film have been studied in situ along with direct characterization of the crystalline structure. Even in the amorphous state, the film resistivity significantly decre…
Absolute total cross sections (TCSs) for electron scattering from boron trifluoride (BF(3)) and phosphorus trifluoride (PF(3)) molecules have been measured using a linear transmission method. The electron energy ranges from 0.6 to 370 eV for BF(3) and from 0.5 to 370 eV for PF(3). The TCS energy dependence for BF(3) e…
The orientation dependence of the converse piezoelectric constants in epitaxial single domain piezoelectric films constrained by substrate is calculated. The calculations are supported by the experimental measuring results of longitudinal piezoelectric constants of ferroelectric tetragonal Pb(Zr0.2Ti0.8)O3 thin films…
Monte Carlo simulations and dynamic field theory (DyFT) are used to study the interactions between dilute spherical particles, dispersed in nematic and isotropic phases of a liquid crystal. A recently developed simulation method (expanded ensemble density of states) was used to determine the potential of mean force (P…
We disclose a microrubbing (μ-rubbing) technique to create multidomain alignment in liquid crystal displays. A small metallic sphere under sufficient load is used to directly rub a polyimide alignment layer that is known to enforce homeotropic boundary conditions of the liquid crystal. We demonstrate a 47μm linewidth…
The ybdL gene of Escherichia coli codes for a protein of unknown function. Sequence analysis showed moderate homology to several vitamin B(6) dependent enzymes, suggesting that it may bind pyridoxal-5'-phosphate. The structure analysis of YbdL to 2.35 A resolution by protein crystallography verifies that it is a PLP d…
Abstract Summary: A novel experimental approach based on the freezing‐point depression of a solvent in a swollen gel has been developed to characterize the structure of nanocomposites. A higher depression in the freezing point has been related with an exfoliated nanocomposite. This increased depression not only depend…
In an effort to develop transmission lines with higher energy storage capabilities for compact pulsed power applications, the University of Missouri-Rolla (UMR) and the University of New Mexico (UNM) have undertaken a collaborative approach to developing and studying ceramic dielectrics. At UMR, the electrical breakdo…
Zn 1 − x Cd x O thin films were deposited on (0001) sapphire substrates by pulsed-laser deposition. Structural and optical properties of Zn1−xCdxO films were strongly correlated to the processing conditions. The composition of the films varied nonmonotonically as a function of deposition temperatures due to the differ…
The phenomenon of contact angle hysteresis was studied on smooth films of polyimide, a polymer type used in the microelectronic industry, by dynamic cycling contact angle measurements based on axisymmetric drop shape analysis-profile in combination with variable angle spectroscopic ellipsometry (VASE). It was found th…
Wet-chemistry techniques, involving the previous elaboration of reactive citrate precursors, have been used to prepare Sr2FeMoO6 double perovskite in polycrystalline form. This material has been characterized by x-ray and neutron powder diffraction, magnetic, and magnetotransport measurements. It exhibits a ferromagne…