Materials Literature
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The protein hemoglobin (Hb) or myoglobin (Mb) in a variety of net surface charge states at different pH values was alternately assembled with negatively charged polysaccharide dextran sulfate (Dex) into layer-by-layer (LBL) films on solid surfaces. The proteins in the LBL {Dex/protein} n films demonstrated a pair of w…
The RuO 2 (100) surface exposes regions with (1×1) and c(2×2) symmetry. The (1×1) phase is very active in oxidizing CO, while the c(2×2) phase is inactive because CO does not adsorb on the c(2×2) phase above 100 K. This experimental finding suggests the absence of undercoordinated 1f-cus Ru sites on the RuO 2 (100)-c(…
We report that nanometer-sized silicon-dioxide particles are sintered to optical transparency at temperatures even below 1000°C, forming nonporous bulk silica glass. The resultant silica glass exhibits visible emission, which appears white to the naked eye, in the wavelength range from ∼400to∼700nm at room temperature…
Wettability was controlled in a rational manner by individually and simultaneously manipulating surface topography and surface chemical structure. The first stage of this research involved the adsorption of charged submicrometer polystyrene latex particles to oppositely charged poly(ethylene terephthalate) (PET) film…
Neutral species and positive ions were extracted directly from a C2H2:NH3 plasma used to grow vertically aligned carbon nanotubes (CNTs) and analyzed by mass spectrometry. We observe that NH3 suppresses C2H2 decomposition and encourages CNT formation. We show that the removal of excess carbon, essential for obtaining…
We present a microscopic theory of fluctuation-mediated pairing mechanism in organic superconductors ${(\mathrm{TMTSF})}_{2}X$, where the experimentally observed coexistence of $2{k}_{F}$ charge fluctuation and $2{k}_{F}$ spin fluctuation is naturally taken into account. We have studied, within the random phase approx…
We have built the liquid crystal phase diagram of several binary mixtures of freely rotating hard spherocylinders employing a second-order virial density functional theory with Parsons scaling, suitably generalized to deal with mixtures and smectic phases. The components have the same diameter and aspect ratio of mode…
Abstract Summary: The phase composition and molecular mobility of Nylon 6 fibers has been studied using 1 H solid‐state NMR transverse magnetization relaxation ( T 2 relaxation) spectroscopy. One of the objectives of this work is to determine the usefulness of the NMR relaxation method to accurately determine the crys…
We studied the ultrafast laser-induced coherent phonon oscillation in prismatic shaped gold nanoparticles assembled in monolayer periodic arrays by using the nanosphere lithographic technique. The amplitude and phase of the oscillation observed by ultrafast pump−probe transient spectroscopy is monitored as the wavelen…
The electrical characteristics of Zn0.9Mg0.1O∕ZnOp–n junctions grown by pulsed-laser deposition on bulk, single-crystal ZnO substrates are reported. The forward turn-on voltage of the junctions was in the range 3.6–4V for Pt∕Au metallization used for the p-Ohmic contact on Zn0.9Mg0.1O.The reverse breakdown voltage is…
This chapter contains sections titled: Introduction Theoretical Methodology Ab Initio Methods Basis Sets Minimal Basis Sets Double-zeta Basis Sets Split Valence Basis Sets Polarized Basis Sets Extended Basis Sets Pseudopotentials Post Hartree–Fock Calculations Geometry Optimization Frequency and Zero-point Energy Calc…
Alanine racemase (ALR), an enzyme that catalyzes the interconversion of Ala enantiomers, is essential for the synthesis of the bacterial cell wall. We have shown that it is harder to inhibit the catalytic activity of ALR from D-cycloserine (DCS)-producing Streptomyces lavendulae than that from Escherichia coli by DCS.…
We report on a planar poly(acrylic acid) (PAA) brush as a new kind of materials coating showing a variable protein resistance that can be controlled by the ionic strength of the protein solution. Using neutron reflectometry it has been found that a silicon wafer covered with a PAA brush strongly binds bovine serum alb…
The nanoarchitecture of unilamellar titania nanosheets was studied by X-ray absorption fine structure (XAFS) analysis utilizing two different geometrical arrangements, s- and p-polarization. In total reflection fluorescence mode using synchrotron radiation X-ray, an XAFS signal was detected in high yield for monolayer…
Impact of the parent material used to yield magnesia on its surface properties was the prime objective of the present investigation. Accordingly, four test magnesias were obtained by calcination at 600 °C of four different parents: magnesium oxalate (to yield MgO−OX), carbonate (MgO−CA), hydroxide (MgO−HY), and perchl…
This chapter contains sections titled: Introduction Syntheses and Pharmacological Properties of Organosilicon Compounds Introduction Silyl Derivatives of Known Drugs O and N Silylation C Silylation Bioactive Organosilicon Compounds without Carbon Analogues Introduction Silatranes Silanols and Siloxanes Miscellaneous T…
Ethanol adsorption, desorption and decomposition on Rh(111) have been studied by X-ray photoelectron spectroscopy and tem-perature-programmed desorption experiments. The evolution of the C is and O is core level spectra was monitored as a function of ethanol exposure and surface temperature. Ethanol adsorption at 90 K…
Model-based experimental design and parameter estimation, coupled with in situ infrared and laser backscattering instrumentation, was applied to the cooling crystallization of a drug compound to construct a model for use in the design of an optimal operating procedure. Because the model was constructed completely from…
Single-step preparation of smaller sized (ca. 3 nm, approximate composition Au 923 ATP 241 ) gold nanoparticles (AuNPs) followed by their self-assembly is demonstrated using 4-aminothiophenol (ATP) as a reducing agent in water/ N, N -dimethylformamide (DMF). Water and DMF play a crucial role during the reduction proce…
Biosilicification in diatoms is achieved by specific interactions between silaffins, composed of polypeptides and long-chain polyamines, and silicic acid derivatives. The polycondensation of silicic acids is reported to be catalyzed by the long-chain polyamines that mainly contain tertiary N-methylpropyleneimine moiet…