Materials Literature
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Collagens, in addition to their structural role in the extracellular matrix, possess a number of functional binding domains. In this study, the binding to collagen of a monoclonal antibody is used as a model to define the molecular features involved in triple-helix interactions with other proteins. Here we report the…
Dry etching of PbZr X Ti 1- X O 3 (PZT) thin film capacitors with RuO X /Pt multilayered electrodes was studied to examine the etching effects. PZT films were deposited on RuO X /Pt/Ti/SiO 2 /Si substrates by sol–gel process and Pt films were prepared by DC magnetron sputtering. PZT and Pt thin films were etched with…
Segment distribution of styrene in an alternating lamellar structure of styrene−2-vinylpyridine diblock copolymer was investigated by neutron reflection. Block copolymers having three types of deuterium-labeled styrene block chains consisting of fully labeled, partially junction-labeled, and partially end-labeled bloc…
Polycrystalline BaTiO3 thin films with thickness ranging from 2100 to 20 000 Å were prepared on platinum substrates using off-axis radio-frequency magnetron sputtering. The variation in room temperature permittivity of the films was investigated with respect to thickness using x-ray diffraction and transmission electr…
Measurement of the linear electro-optic effect in poled polymer thin films with two parallel electrodes is analyzed. A single-beam polarization interferometry is adopted in a reflection configuration. The dependence of the linear electro-optic modulated intensity on linear optical parameters is investigated experiment…
The finite single-file system (diffusion in one dimension where the mutual passage of particles is inhibited) with particle exchange at the margins and an attractive nearest-neighbor particle-particle interaction is investigated. As the central quantity, the residence time distribution is introduced and related to exp…
We have investigated the performance of blue upconversion fiber lasers based on thulium-doped ZBLAN fiber, operating at 480 nm with a 1140-nm pump. Extensive fluorescence measurements have provided the necessary spectroscopic data to present a computer model that describes the performance of such lasers with good accu…
The role of a miniscaffolding protein, miniCipC1, forming part of Clostridium cellulolyticum scaffolding protein CipC in insoluble cellulose degradation was investigated. The parameters of the binding of miniCipC1, which contains a family III cellulose-binding domain (CBD), a hydrophilic domain, and a cohesin domain,…
Abstract The internal carbon of the inverted pyrrole in N-confused tetraphenylporphyrin 1 (5,10,15,20-tetraphenyl-2-aza-21-carbaporphyrin) was nitrated by using the following aqueous solutions at room temperature for several minutes; (1) NaNO2/HCl (yield 71%) and (2) 30 wt% nitric acid (yield 27%).
Although amphiphilic polystyrene−poly(ethylene oxide) diblock copolymers (PS−PEO) adsorb from aqueous solutions to hydrophobic surfaces, they are unable to form an end-anchored brush. Four independent techniques scanning angle reflectometry, hydrodynamic layer thickness measurements, streaming potential measurements,…
Based on the model combining the spin double exchange and the lattice polaron, we have studied the colossal-magnetoresistance phenomena observed in perovskite manganites ${\mathrm{R}}_{1\mathrm{\ensuremath{-}}\mathrm{x}}$${\mathrm{A}}_{\mathrm{x}}$${\mathrm{MnO}}_{3}$. First, effects of both the double exchange and th…
The existence of β-C3N4 with hardness characteristics similar or better than diamond was predicted in 1990 by Liu and Cohen. Many studies have since been devoted to the synthesis of this compound. In the present work, carbon nitride films were deposited by various reactive magnetron sputtering processes of graphite ta…
The reaction of N-n-Bu(4)MnO(4) or NaMnO(4) with appropriate reagents in ethanol-pyridine leads to the high-yield formation of new mixed-valence trinuclear oxo-centered Mn(III,III,II) complexes of general formulation [Mn(3)O(X-benzoato)(6)L(3)] (1, X = 2-fluoro, L = pyridine; 2, X = 2-chloro, L = pyridine; 3, X = 2-br…
The chemical composition and microstructure of dual ion beam-deposited CNx films with nitrogen contents in the range 20–33 at.% have been examined by Fourier transform infrared spectroscopy (FTIR) and x-ray photoelectron spectroscopy (XPS). The FTIR spectra together with other published data have been used to construc…
The origin of diffraction peaks observed at low wave vector in many complex glasses remains a central issue in the understanding of amorphous structures. In this work a combination of neutron and x-ray diffraction is used to correlate the contributions from the different atom pair correlations to such peaks in rubidiu…
Ligand-stabilized gold clusters may serve as model catalysts, and the packing of their gold atoms is therefore of great interest. The cluster of the stoichiometry Au 55 [P(C 6 H 5 ) 3 ] 12 Cl 6 is thought to be the smallest known defined compound in which the gold maintains a cubic dense packed metallic (ccp) state. W…
The X-ray structure of tyrosine phenol-lyase (TPL) complexed with a substrate analog, 3-(4'-hydroxyphenyl)propionic acid, shows that Arg 381 is located in the substrate binding site, with the side-chain NH1 4.1 A from the 4'-OH of the analog. The structure has been deduced at 2.5 A resolution using crystals that belon…
Complex formation between pyrazine derivatives and dimeric self-assembly of αααα-isomer of meso -tetrakis(2-carboxy-4-nonylphenyl)porphyrin Zn complex ( 1·Zn ) was investigated. Thermal atropisomerization of 1·Zn in a nonpolar solvent such as toluene gives the αααα-atropisomer exclusively. Vapor pressure osmometry for…
First-principles quantum calculations are potentially of great value for assessing the plausibility of proposed catalytic reaction mechanisms. The present analysis of reaction pathways and energetics for key elementary steps in the catalytic decomposition of NO to N 2 + O 2 by Cu-exchanged zeolites yields novel insigh…
The chemisorptive behavior of CO on several planar model monometallic and bimetallic Pd, Cu, and Au catalysts supported on thin film Al2O3 has been investigated using infrared reflection absorption spectroscopy (IRAS). For Pd and Cu monometallic catalysts, CO adsorption spectra indicate a high representation of low in…