Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The surface-stabilized ferroelectric liquid crystal (SSFLC) effect is a serious candidate for application in television displays, due to its high switching speed and viewing angle independence. For the television application, however, several severe requirements must be fulfilled, of which the demand for a large amoun…
Zirconia as well as yttria‐zirconia and calcia‐zirconia solid‐solution powders were crystallized under hydrothermal conditions from (co)precipitated hydroxides. The morphology of the powder particles is strongly dependent on the crystallization conditions. The powders crystallized in a water solution of Na, K, and Li…
Abstract Liquid‐crystalline polymers with mesogenic groups in the main chain and side chains as well as their networks are studied by the dynamic mechanical method. The homopolymers are compared with chiral copolymers of a similar chemical structure. Mechanical relaxation transitions are correlated with transitions ob…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA study of the wavelength and potential dependence of surface enhanced Raman scattering on copper, silver, and gold electrodesBruce Chase and Bruce ParkinsonCite this: J. Phys. Chem. 1991, 95, 20, 7810–7813Publication Date (Print):October 1, 1991Publication History Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRelationship of STM and AFM images to the local density of states in the valence and conduction bands of rhenium selenide (ReSe2)B. A. Parkinson, J. Ren, and M. H. WhangboCite this: J. Am. Chem. Soc. 1991, 113, 21, 7833–7837Publication Date (Print):October 1, 1991Publication…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochemical pathways of water on palladium (111) at 6.4 eVX. Y. Zhu, J. M. White, M. Wolf, E. Hasselbrink, and G. ErtlCite this: J. Phys. Chem. 1991, 95, 21, 8393–8402Publication Date (Print):October 1, 1991Publication History Published online1 May 2002Published inissue 1…
Reflectance anisotropy spectrometry is used to study the electronic properties of sulfide-passivated GaAs. The optical technique allows measurement of the Fermi-level displacement at the surface in situ, while the sample is immersed into a sulfide solution. The kinetics of the process was found to be very sensitive to…
SiC‐ and Al 2 O 3 ‐platelet‐reinforced mullite‐matrix composites were fabricated by both conventional powder processing and a pressure filtration route with constant filtration rate. Consolidation during the pressure filtration experiment was monitored as a function of time with respect to actual pressing stages. The…
This paper compares the mineralogy and chemistry of clay minerals in sediments from various depths and positions in Abert Lake and surrounding playa with those of the weathered materials entering the lake in order to reveal the nature and extent of post-depositional mineralogical modification. Analytical electron micr…
Zr–Hf interdiffusions were carried out at 1350° to 1520°C for polycrystalline tetragonal solid solutions of 14CeO 2 ·86(Zr 1‐ x Hf x )O 2 with X = 0.02 and 0.10. Lattice and grain‐boundary interdiffusion parameters were calculated from the concentration distributions by using Oishi and Ichimura's equation. Lattice int…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared spectra of boron atom-water molecule reaction products trapped in solid argonLester Andrews and Thomas R. BurkholderCite this: J. Phys. Chem. 1991, 95, 22, 8554–8560Publication Date (Print):October 1, 1991Publication History Published online1 May 2002Published iniss…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalytic behavior of noble metal/reducible oxide materials for low-temperature carbon monoxide oxidation. 2. Surface characterization of gold/manganese oxideSteven D. Gardner, Gar B. Hoflund, Mark R. Davidson, Herbert A. Laitinen, David R. Schryer, and Billy T. UpchurchCite…
Mullite ceramics were fabricated according to the recently developed reaction‐bonded Al 2 O 3 (RBAO) technology. Green compacts consisting of mechanically alloyed Al, SiC, and Al 2 O 3 were heat‐treated in two steps. During the first hold at 1200°C, Al and SiC were oxidized to form Al 2 O 3 and SiO 2 . On further heat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and spectroscopic and magnetic properties of a unique diamagnetic binuclear .mu.-oxo vanadium(IV) complex. Crystal structure of [(tpa)VO(.mu.-O)VO(tpa)](ClO4)2 (tpa = tris(2-pyridylmethyl)amine)Hans Toftlund, Sine Larsen, and Keith S. MurrayCite this: Inorg. Chem.…
Communication: The effective conjugation length of poly(phenylenevinylene) an important conducting polymer, can be estimated by extrapolation of the results of UV/VIS/NIR studies of the radical anions and dianions of the soluble, well‐characterized oligo(phenylenevinylene)s shown in the figure. This information, in tu…
Several approaches were used to study the role of GroEL, the prototype chaperonin, in the nitrogen fixation (nif) system. An Escherichia coli groEL mutant transformed with the Klebsiella pneumoniae nif gene cluster accumulated very low to nondetectable levels of nitrogenase components compared with the isogenic wild-t…
Diphasic gels with Al/Si atomic ratios of 6/1, 3.1/1, 3/1, 2/1, and 1/1 were used to study the effect of precursor composition on mullite formation process and the resulting microstructure. Mullite formation initiated at about 1300°C for all samples, with only some slight differences in temperatures. The mullite forma…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
The contrast of dislocations in icosahedral quasicrystals observed by transmission electron microscopy is discussed in the framework of the kinematical theory of electron diffraction. It is found that, owing to the special structural features of dislocations in quasiperiodic lattices, there are two basically different…
The solubility limit of α'‐SiAION solid solutions on the Si 3 N 4 ─YN:3AIN composition join in the system Si 3 N 4 ─YN─AIN has been determined at 1800°C. The end members of these solid solutions are Y 0.43 Si 10.7 Al 1.3 N 16 and Y 0.8 Si 9.6 Al 2.4 N 16 . Unit‐cell dimensions of the α'‐SiAION solid solutions in the s…