Materials Literature
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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…
Abstract All of the blend systems studied to date show a tendency to have an uneven distribution of crosslinks between the phases; this must be taken to be the norm, with instances of near-even crosslinking being the exception. When the crosslink distribution has been made to be near even, the properties investigated…
Three metallization schemes, namely Al/Si, Ti-Au and TiWN-Au contacts on B-doped polycrystalline diamond films have been compared. After annealing at 450/spl deg/C in nitrogen Al/Si contacts show the lowest contact resistivity in the order of /spl sim/10/sup -7/ /spl Omega/ cm/sup 2/. TiWN-Au contacts were found to be…
The problem of a joint of dissimilar materials with arbitrary edge angles exposed to thermal loading is treated. Emphasis is placed on the investigation of the stress distribution around the singular point for complex singular eigenvalues. For this case, an analytical form of the stress is obtained. Some examples are…
Studies have been carried out on the compatibilization of polypropylene and nylon using maleic anhydride grafted polypropylene (Polybond™ 3002). Solution and FTIR studies on the resin indicated that the compatibilizer reacted with nylon. The usefulness of the compatibilizer has been demonstrated for the recycling of s…
Dynamical theories of atomic number sensitive image (or Z-contrast image) formed by thermal diffusely scattered (TDS) electrons are proposed based on first-principles considerations. `Exact' theories are derived for simulating images obtained either in scanning transmission electron microscopy (STEM) using an annular…
SUMMARY X‐ray microanalysis of non‐biological and biological specimens was carried out in the environmental scanning electron microscope (ESEM) under different conditions of specimen distance (the distance travelled by the electron probe within the specimen chamber) and chamber atmosphere. Using both water vapour and…