Materials Literature
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Using a simple method of direct heating of bulk copper plates in air, oriented CuO nanowire films were synthesized on a large scale. The length and density of nanowires could be controlled by growth temperature and growth time. Field emission (FE) measurements of CuO nanowire films show that they have a low turn-on fi…
The H(2)O(2)-mediated enlargement of Au nanoparticles (NPs) and the growth mechanism are described. In addition to the deposition of gold on the NP faces, the formation of nanocrystalline clusters at the intersection of the faces is observed. The detachment of the latter nanoclusters provides additional seeds for the…
Plasmid-encoded His-tagged glucose permease of Escherichia coli, the enzyme IIBCGlc (IIGlc), exists in two physical forms, a membrane-integrated oligomeric form and a soluble monomeric form, which separate from each other on a gel filtration column (peaks 1 and 2, respectively). Western blot analyses using anti-His ta…
The positive exciton coupling circular dichroism (ECCD) exhibited by monomer of (R)-di-2-naphthylprolinol in organic solvent is inverted to be negative upon the formation of its nanoparticles.
The properties of gratings in an azobenzene polymer inscribed with different combinations of the polarizations of the recording beams are investigated and the optimal conditions for polarization multiplexing are found. Two holograms are stored with the same spatial frequency and the same polarization of the reference…
Interplay between orbital and spin degrees of freedom is theoretically studied for the phase transition to the spin-singlet state with lattice dimerization in pyroxene titanium oxides $A\mathrm{Ti}{\mathrm{Si}}_{2}{\mathrm{O}}_{6}$ $(A=\mathrm{Na},\mathrm{Li})$. For the quasi-one-dimensional spin-$1∕2$ systems, we der…
We describe a probe of diffusivity (D) and mobility (B) for a dense 2D granular system. We introduce random motion by stirring, and characterize D by particle tracking. To measure B we measure the force needed to push a particle through the medium at fixed velocity, v, using three sizes of tracer particle. We find sim…
NAD(+)-dependent (R)-2-hydroxyglutarate dehydrogenase (HGDH) catalyses the reduction of 2-oxoglutarate to (R)-2-hydroxyglutarate and belongs to the d-2-hydroxyacid NAD(+)-dependent dehydrogenase (d-2-hydroxyacid dehydrogenase) protein family. Its crystal structure was determined by phase combination to 1.98 A resoluti…
There are several different families of repeat proteins. In each, a distinct structural motif is repeated in tandem to generate an elongated structure. The nonglobular, extended structures that result are particularly well suited to present a large surface area and to function as interaction domains. Many repeat prote…
The electrochemical formation of β-hydride and β-deuteride phases of a carbon supported palladium nanoparticle catalyst has been investigated using time resolved in situ energy dispersive X-ray absorption spectroscopy (EDE) and the simultaneously collected chronoamperometric data. For the β-hydride formation the rate…
We used inelastic neutron scattering to determine the microscopic spin Hamiltonian of a tetrairon(III) molecular cluster with trigonal symmetry, $[{\mathrm{Fe}}_{4}{(\mathrm{thme})}_{2}{(\mathrm{dpm})}_{6}]$, obtained from a parent compound with ${C}_{2}$ symmetry by site-specific ligand substitution. Intra-multiplet…
A dynamic supramolecular system involving hydrogen bonding between a Mn(III) salen catalyst and a Zn(II) porphyrin receptor exhibits selectivity for pyridine appended cis-beta-substituted styrene derivatives over phenyl appended derivatives in a catalytic epoxidation reaction.
To compare kinetic properties of homologous isozymes of NADP+-specific isocitrate dehydrogenase, histidine-tagged forms of yeast mitochondrial (IDP1) and cytosolic (IDP2) enzymes were expressed and purified. The isozymes were found to share similar apparent affinities for cofactors. However, with respect to isocitrate…
Divalent surfactant [CH3(CH2)15N(CH3)2(CH2)3N(CH3)3]2+ - 2Br- (C16-3-1) was used as a structure directing agent (SDA) for the synthesis of highly ordered periodic mesoporous organosilicas (PMOs) with cubic Fm3m symmetry from 1,2-bis(triethoxylsilyl)ethane (BTEE) under basic conditions.
Free standing smectic films have been investigated at the transition from the smectic- C phase to the isotropic phase. In the vicinity of the bulk transition temperatures, isotropic droplets of micrometer size appear in the film. Such systems represent convenient models for anisotropic, two-dimensional emulsions. A ch…
The assembly of silicate and surfactant confined within cylindrical alumina pore channels results in circular hexagonal, concentric lamellar and other unique mesostructures.
The local electrostatic properties and electronic transport at $\ensuremath{\Sigma}5$ grain boundaries in donor-doped $\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}$ bicrystals are examined using a combination of scanning probe microscopy (SPM) techniques and impedance spectroscopy. A combination of scanning surface potentia…
The oxidation of aluminum nanoparticles is studied with classical molecular dynamics and the Streitz-Mintmire (Streitz, F. H.; Mintmire, J. W. Phys. Rev. B 1994, 50, 11996) electrostatic plus (ES+) potential that allows for the variation of electrostatic charge on all atoms in the simulation. The structure and charge…
Square and round single crystalline SnO platelets have been prepared in a solution-based chemical route aided with sonication at room temperature.
The first examples of azide-bridged bimetallic trinuclear complexes ([M(cyclam)][FeL(N3)(mu1,5-N3)]2) (H2L = 4,5-dichloro-1,2-bis(pyridine-2-carboxamido) benzene) have been structurally and magnetically characterized.