Materials Literature
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The doping mechanism of Sn in In 2 O 3 (ITO) powder was investigated using 119 Sn transmission Mössbauer spectroscopy (TMS) and X-ray diffraction (XRD) in view of the chemical state of Sn. Deconvolution analyses of TMS spectra revealed that there was substitutional Sn 4+ coordinated not only by 6 oxygen atoms [Sn In ·…
Divalent molecular lanthanide complexes are shown to offer promise as tunable light emitting materials in thin film electroluminescent displays for the first time in this study. Bright orange luminescence is obtained from thin film EL device structures containing bis[tris(dimethylpyrazolyl)borate]europium(II) (1), whi…
ZnO whiskers were epitaxially grown by a chemical-vapor deposition technique employed at atmospheric pressure. Highly oriented ZnO whiskers grew at a substrate temperature of 550°C on (0001)α-Al 2 O 3 substrates with a growth rate of 3.7 nm/s. X-ray diffractometry revealed that the epitaxial relationship between the w…
Conformational diversity within unique amino acid sequences is observed in diseases like scrapie and Alzheimer's disease. The molecular basis of such diversity is unknown. Similar phenomena occur in subtilisin, a serine protease homologous with eukaryotic pro-hormone convertases. The subtilisin propeptide functions as…
The spectra of internal ac impedance and fluxmetric and energetically effective circular permeabilities are calculated for infinite slab and cylinder in classical and domain models. The domain models assume transverse bar domains for a slab and transverse circular disk domains for a cylinder, with technical magnetizat…
Desktop studies accurately predict trends in corrosion by‐product release. Utility experiences were examined to assess the reliability of solubility models and decision trees in forecasting control of lead (Pb) and copper (Cu) corrosion by‐products. Such approaches cannot quantitatively predict effectiveness of corros…
The dehydroxylation of boehmite has been studied by the application of infrared emission spectroscopy over the 200 to 750 °C temperature range. The dehydroxylation is followed by the loss of intensity of the hydroxyl stretching frequencies observed at 3478, 3319, and 3129 cm −1 and by the loss of intensity of the hydr…
The electronic, structural, and stability properties of the cubic hydride ${\mathrm{Mg}}_{2}{\mathrm{NiH}}_{4}$ are analyzed based on ab initio total-energy calculations. We evaluate the electronic band structures, density of states, charge-density distributions, and bond character for different hydrogen configuration…
The surface-enhanced Raman scattering (SERS) properties of rhodium films electrodeposited onto a SERS-active gold substrate are examined as a function of overlayer thickness, using carbon monoxide and thiocyanate as chemisorbate probes in aqueous solution. Although the adsorbate Raman signals obtained for ultrathin (≤…
Commercially available cellulose (Avicell PH101) was successfully acylated under homogeneous solution conditions by the following procedure: 2.0 g of cellulose were stirred with 75 mL of N,N-dimethylacetamide for 1 h at 150°C, 3.5 g of LiCl were added, the temperature was raised to 170°C, ca. 18.5 mL of the solvent we…
Abstract The syntheses and unique chemical properties of metalladithiolene rings (especially in [CpM(S2C2R1R2)]-type complexes) found by our research group are reviewed. The constructions of metalladithiolene rings by one-pot reaction among [CpM(CO)n], alkyne, and elemental sulfur and by the reaction between [CpM(CO)n…
Triclinic crystals of lysozyme, hydrogen-deuterium exchanged in deuterated solvent, have been studied using neutron quasi-Laue techniques and a newly developed cylinder image-plate detector. The wavelength range employed was from 2.7 to 3.5 A, which gave 9426 significant reflections [F >/= 2sigma(F)] to a resolution l…
This work concentrates on the diffusion barrier stability of very thin (10 or 20 nm) α- or β-Ta, TaN, Ta(O) and Ta(N,O) films in the Cu/barrier/Si system. Based on the classical theory of the thin film growth and know how of material transport in thin films, the various Ta-based films were classified according to thei…
The rates and pathways of decarboxylation of acetic acid derivatives, RCO 2 H, and their Na + salts, RCO 2 Na, which possess electron-withdrawing groups (R = CCl 3 −, CF 3 −, HOC(O)CH 2 −, NH 2 C(O)CH 2 −, CF 3 CH 2 −, NCCH 2 −, CH 3 C(O)−) were determined in H 2 O at 100−260 °C and a pressure of 275 bar. Simple conve…
Single-wall carbon nanotubes (SWNTs) were synthesized by the irradiation of a 20-ms CO 2 laser pulse (1-kW peak power) onto a graphite−Co/Ni composite target at 25−1200 °C. Characterization of carbonaceous deposits using Raman scattering, scanning electron microscopy, and transmission electron microscopy showed that S…
The feasibility of low‐temperature synthesis of yttrium‐doped zirconia (Y‐ZrO 2 ) crystalline powders in aqueous solutions at lessthan equal to100°C has been evaluated, and the hydrothermal crystallization mechanism for Y‐ZrO 2 powders also has been investigated. Coprecipitated (Y,Zr) hydroxide gel, mechanical mixture…
It has previously been established that sequences at the C termini of polypeptide substrates are critical for efficient hydrolysis by the ClpP/ClpX ATP-dependent protease. We report for the bacteriophage lambda O replication protein, however, that N-terminal sequences play the most critical role in facilitating proteo…
We have studied the forces between a sphere and a plane surface of yttria‐partially‐stabilized tetragonal‐zirconia immersed in aqueous solutions of low‐molecular‐weight ( M w = 10 000) poly(acrylic acid) (PAA) using atomic force microscopy. The measurements are performed at high pH where the adsorbed, highly charged a…
A new series of dyes for nonlinear optical (NLO) and photorefractive (PR) applications investigated by optical and electrooptical absorption spectroscopy. Optimized PR and NLO chromophores are obtained based on the exceptionally strong heterocyclic thiazolidenemalononitrile acceptor unit, combined with the proper choi…
It is demonstrated that a porous polysilicon (PPS) diode with a structure of Au/PPS/n-type Si operates as an efficient stable surface-emitting cold cathode. 1.5 μm of an nondoped polysilicon layer is formed on an n-type (100) silicon wafer and anodized in a solution of HF (50%): ethanol=1:1 at a current density of 10…