Materials Literature
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Abstract Adsorption of Triton X‐100 on various silica substrates has been investigated. A number of solids, including a natural quartz, this quartz washed with HCl acid and subsequently heated at 1273 K; two aerosils and one Kieselgel silicas were studied. These solids exhibit surface areas in the range of 5 to 430 m…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Synchrotron Radiation Electric Field X-ray Solution Scattering Study of DNA at Very Low Ionic StrengthM. H. J. Koch, Z. Sayers, P. Sicre, and D. SvergunCite this: Macromolecules 1995, 28, 14, 4904–4907Publication Date (Print):July 1, 1995Publication History Published onlin…
The new Basolan AS process for wool dyeing is described. The process restricts the deterioration of wool properties that occurs as a result of dyeing. This is achieved through a reduction in the extent to which wool is permanently set during dyeing. Two options are available to the dyer involving the addition of antis…
A review was given for our search for halide ferroelectrics with the chemical formula A 2 BX 4-type, having structure of β-K2SO4-type and Sr2GeS4-type.
Abstract A novel synthesis of linear high‐molecular‐weight poly(4‐vinylphenol) (PVPh) and poly[styrene‐ co ‐(4‐vinylphenol)] (STVPh, 2 ) via demethylation reaction is developed. The parent polymers, poly(4‐methoxystyrene) and poly[styrene‐ co ‐(4‐methoxystyrene)] produced by free‐radical polymerization, are converted…
New poly(azomethine sulfones) with linear structures containing sulfonyl bis(4-phenoxyphenylene) and oxo bis(benzylideneaniline) or methylene bis(benzylideneaniline) units were prepared in the conventional literature manner by condensing the dialdehyde sulfone monomer (V) with diamines such as 4,4′-oxydianiline (IIIa)…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTControl over Nanopits on the Basal Plane of Graphite by Remote Argon Plasma and Subsequent Thermal OxidationA. Tracz, A. A. Kalachev, G. Wegner, and J. P. RabeCite this: Langmuir 1995, 11, 7, 2840–2842Publication Date (Print):July 1, 1995Publication History Published online1…
Abstract— The display quality of active‐matrix LCDs has been greatly improved. However, the problem of narrow viewing angle has not yet been sufficiently solved. In order to solve this problem, a new LCD comprised of a bend‐alignment LCD cell with an optical compensator was designed. The improvement is shown by theore…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyoxometalate-Diphosphate Complexes. 4. Structure of Na4[(O3PCHN(CH3)2PO3)W2O6].cntdot.11H2OUli Kortz and Michael T. PopeCite this: Inorg. Chem. 1995, 34, 14, 3848–3850Publication Date (Print):July 1, 1995Publication History Published online1 May 2002Published inissue 1 Ju…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFunctionalized Poly(ether ether ketones) from 4,4-Bis(4-hydroxyphenyl)pentanoic Acid, 2,2'-Isopropylidenediphenol, and 4,4'-Difluorobenzophenone: Synthesis, Behavior, and Polymer Analogous Amidation of the Carboxylic GroupsThomas Koch and Helmut RitterCite this: Macromolecul…
Optical and electron spin resonance (ESR) measurements have been made on a type Ila diamond, electron irradiated at room temperature and isochronally annealed to high temperatures. It was found that the ESR centre R4/W6 formed when the vacancy becomes mobile. Evidence supporting a divacancy model for R4/W6 is presente…
Secondary wall thickness is a function of maturity in cotton fibers. Fibers begin to elongate at anthesis, and elongation continues for approximately 20 days. As this elongation period ends, deposition of the secondary wall begins and continues for 25- 30 days until the boll "matures" and opens. The exact period of el…
Nanoprocessing can be considered a distinct form of grain boundary engineering by which property enhancements are achieved by deliberately increasing the volume fractions of grain boundaries and triple junctions in a material. Electrodeposition has been shown to be a technologically viable production method to synthes…
The structures, and Raman and infrared spectra of vitreous ${\mathrm{B}}_{2}$${\mathrm{O}}_{3}$ have been investigated by means of ab initio calculations. ab initio calculations. The calculated frequencies, structural parameters, and glass transition temperature ${\mathit{T}}_{\mathit{g}}$ are in good agreement with e…
Hot isostatically pressed Si 3 N 4 was coated with chemically vapor‐deposited Ta 2 O 5 , and subjected to oxidative and corrosive environments to determine the feasibility of using a Ta 2 O 5 coating for protecting Si 3 N 4 from hot corrosion. The coated structure was relatively stable at 1000 deg; C in pure O 2 . How…
Extended TTF‐based donor systems based for the first time on selenophene (see Fig.) are reported. Selenophene is an isologue of thiophene but has a stronger electron‐donating ability, a larger size, and a higher polarizability. These factors should lead to materials with increased bandwidth, improved dimensionality, i…
Calculations are presented for the local density of phonon states scrD(${\mathrm{\ensuremath{\omega}}}^{2}$), the lattice specific heat ${\mathit{C}}_{\mathit{v}}$, and the transmission coefficient of a particle through a layered quasicrystal whose ends are fixed. In this paper, scrD(${\mathrm{\ensuremath{\omega}}}^{2…
Abstract High resolution X‐ray diffraction measurements are performed on porous silicon samples (p + type, 40% porosity) of various thicknesses (from 0.03 to 20 μm). In the thicker samples narrow Bragg peaks are observed for as‐formed samples, with profiles close to those of dynamical diffraction theory. For thin samp…
In connection with the mechanism of reversible alignment change of nematic liquid crystals induced by photoisomerizable azobenzene molecules attached to a quartz surface, a static contact angle measurement was carried out for azo-modified plates before and after UV irradiation. The results were not in line with the so…
Transparent conducting ZnO:B films for solar cells were produced by DC magnetron sputtering in B 2 H 6 -Ar mixtures. Low-resistivity textured films could be obtained at relatively low substrate temperatures of 150-200° C. The resistivity, electron mobility and carrier concentration were 4×10 -4 Ω cm, 60 cm 2 / Vs and…