Materials Literature
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Introduction: the role of interfacial phenomena in biothecnology - an overview. Modern theory and methods: proteins at interfaces: principles, problems, and potential surfaces in biology and biomaterials - description and characterization physicsof solid surfaces thermodynamics of protein adsorption theoretical models…
The combination of directed mutagenesis with high-resolution structure analysis has made it possible to systematically address fundamental questions of protein folding and stability. Here we briefly review some recent results in this area based on studies of the lysozyme of bacteriophage T4. Extended segments of the p…
Gold colloids are homogeneously coated with silica via a three-step deposition process; the thickness of the silica layer can be completely controlled, and the particles can be transferred into practically any solvent.
An improved preparation of 8-amino-7-quinolinecarbaldehyde has been developed. The methyl group of 7-methyl-8-nitroquinoline may be oxidized to an aldehyde by treatment first with dimethylformamide dimethyl acetal followed by sodium periodate. Reduction with iron provides the amino aldehyde. An analogous sequence affo…
The feasibility of preparing multilayer porphyrin films with monolayer control of composition and thickness is demonstrated. Successive dip-coating of tetraruthenated zinc porphyrin, [ZnTPyPBpy] 4+, and meso -tetraphenylporphyrin sulfonate, [M-TPPS] 4-, is shown to result in linear growth of the film thickness (12.7(6…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTCO2 as the Ultimate Degradation Product in the H2O2 Oxidation of 2,4,6-Trichlorophenol Catalyzed by Iron TetrasulfophthalocyanineAlexander Sorokin, Sophie De Suzzoni-Dezard, Didier Poullain, Jean-Pierre Noël, and Bernard MeunierView Author Information Laboratorie de Ch…
The degree of in-plane molecular orientation of various polyimides (PIs) and their precursors, poly(amic acid)s (PAAs), were estimated by measuring the visible dichroic absorption at an incidence angle for a rod-like dye (perylenediimide, PEDI) dispersed in the matrices. The effects of PI chain structure, film thickne…
Software based on nonlinear shell theory can simulate 3D motions related to real fabric-manufacturing processes. This simulation capability advances the technologies necessary for automating the textile and apparel industries.
Subtilisin Carlsberg dissolved in aqueous solution is several orders of magnitude more active than the enzyme suspended in anhydrous acetonitrile. In order to ascertain why, we employed crystalline subtilisin lightly cross-linked with glutaraldehyde as a catalyst in both aqueous and organic media. The structure of thi…
Surface macromolecular architectures with regional dimensional precision, control of the thickness of a graft layer, and blocks of graft chains were attempted using the surface photo-graft copolymerization method pioneered by Otsu et al. This is based on the photochemistry of benzyl N, N -diethyldithiocarbamate, which…
This paper describes the synthesis and characterization of self-assembled second-order nonlinear optical multilayer materials containing the high-hyperpolarizability [(aminophenyl)azo]pyridinium chromophore. The chromophoric multilayers are assembled on clean glass or single-crystal silicon substrates via the followin…
The surface structure of mesoporous silica crystals FSM-16 with a narrowly distributed pore size has been studied by FTIR, measurement of SiOH number and adsorption of N2 and H2O. IR spectra of FSM-16 outgassed at temperatures above 170 °C showed a sharp band at 3740 cm–1 due to free SiOH and a broad shoulder at 3600–…
Azobenzene monolayers on silicon have been prepared by two synthetic methods: (1) chemisorption of triethoxysilanes, and (2) acylation of amine-functionalized self-assembled monolayers with acid chloride derivatives. A series of films were prepared with different methylene spacer lengths and different terminal end gro…
This book gives a systematic overview on the scientific fundamentals of crystal growth from the classical phenomenological description to the recent theoretical contributions of statistical physics such as studies on surface roughening and on the pattern formation in the diffusion-limited growth. The book emphasizes p…
The methylation of a nickel(II) complex (CTPP)Ni II of 2-aza-5,10,15,20-tetraphenyl-21-carbaporphyrin (CTPPH 2 ) with the mild methylating agent methyl iodide yields novel stable organonickel(II) complexes: diamagnetic (21-CH 3 TPP)Ni II and two scarce paramagnetic species (2-NH-21-CH 3 CTPP)Ni II X and (2-NCH 3 -21-C…
A new Schiff-base ligand based on the condensation of diaminomaleonitrile and 4-(diethylamino)salicylaldehyde is reported with its copper, nickel, and zinc complexes. Their second-order nonlinear optical properties are investigated by electric field induced second harmonic (EFISH) and ZINDO quantum-chemical calculatio…
We report here the direct synthesis of a hexagonal form of manganese dioxide using mild hydrothermal methods. The reaction of potassium or sodium permanganate in water at 170 °C leads directly to potassium or sodium manganese dioxide, Alk ≈0.25 MnO 2 ·0.6H 2 O, with a R 3̄ m rhombohedral structure like Li x (H 2 O)TiS…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTRadical Living Graft Polymerization on the Surface of Polymeric MaterialsWantai Yang and Bengt RånbyView Author Information Department of Polymer Technology, Royal Institute of Technology, 10044 Stockholm, Sweden Cite this: Macromolecules 1996, 29, 9, 3308–3310Publication Date…
The pulsed electroacoustic (PEA) method is widely known to be an excellent method for measuring the space charge distribution that accumulates in thick dielectric materials (1 to 5 mm). We have refined the PEA measurement system for use on thin dielectric materials. With FFT deconvolution to compensate for the frequen…
The temperature- and pressure-driven solid state valence tautomeric transformations of [Co II (3,5DTBSQ) 2 (phen)]·C 6 H 5 CH) and nonsolvated [Co II (3,5DTBSQ) 2 (phen)] have been studied by EXAFS and XANES. When the toluene solvate sample is cooled it converts in the 270−215 K region ( T c = 240 K) from a high-spin…