Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation of quantum-size semiconductor particles in a layered metal phosphonate host latticeGuang Cao, L. K. Rabenberg, Christine M. Nunn, and Thomas E. MalloukCite this: Chem. Mater. 1991, 3, 1, 149–156Publication Date (Print):January 1, 1991Publication History Published o…
The hydrothermal synthetic conversion of aluminium-rich zeolites to organo-zeolites in the presence of N,N,N-trimethyl-1-adamantammonium cations is now extended to the faujasite system. Rates of conversion are seen to be dramatically affected by various treatments of the FAU (faujasite) zeolites. Rates are depressed b…
Two novel, simple control strategies for current-controlled pulse-width modulated (PWM) transistor inverters are presented. Both methods are based on the three-level hysteresis comparators which select appropriate inverter output voltage vectors via a switching electrically programmable read-only memory (EPROM) table.…
Highly stable structures with planar tetracoordinate central atoms, Al4O, Al4N–, Al3SiN, cis-Al2Si2C, trans-Al2Si2C and AlSi3B, are predicted computationally at the ab initio MP4SDTQ/6-311 + G*//MP2(full)/6-31G* level.
A good review of most of the literature in the field of polymers published since 1968 makes this a good starting point for someone just entering the field. The author gives a thorough overview of many aspects of diffusion in polymers. The chapters are somewhat narrow in scope, though they provide useful material such…
BASIC PHYSICS. Review of Atomic Structure and Statistical Mechanics. Crystalline Solids and Energy Bands. FUNDAMENTALS OF SEMICONDUCTORS. Semiconductor Materials and Their Properties. Carrier Transport in Semiconductors. Excess Carriers in Semiconductors. JUNCTIONS AND INTERFACES. p-n Junctions. Static I-V Characteris…
Cellulose is the most abundant biological polymer on Earth. It is found in wood and cotton, and forms the basic structural foundation of the cell wall of almost all eukaryotic plants. Bacteria are known to secrete cellulose as part of their metabolism of glucose and other sugars. The focus of this review is upon bacte…
Different contributions to the dielectric permittivity in ferroelectric liquid crystals are discussed, with emphasis on the soft mode and the Goldstone mode and their location in the dielectric spectrum. Experimentally, the complex dielectric permittivity has been studied as a function of temperature and frequency in…
In aquatic environments, microorganisms attach to metals and colonise the surface to form biofilms producing an environment at the biofilm/metal interface that is radically different from that of the bulk medium in terms of pH, dissolved oxygen, and organic and inorganic species and leading to electrochemical reaction…
It is argued that the key factor required to make vacuum microelectronics successful is closely related to an understanding and control of the physics, materials and microfabrication technology for field emitter arrays (FEAs). The topics discussed are the optimization and theoretical limit of the FEA; thermal stabilit…
Foreword Introduction to the English edition Historical overview 1. Noncrystalline solids and glasses 2. The vitreous transition 3. Conditions for vitrification 4. Structure of glass: methods of study using radiation scattering 5. Structure of glass: use of spectroscopic methods 6. Phase separation in glasses 7. Study…
Two commercially available water‐soluble chitosan salts, chitosan lactate and chitosan hydroglutamate, were examined for antagonistic effect against Escherichia coli V517, Staphylococcus aureus MF‐31 and Saccharomyces cerevisiae 15. Significant inactivation of each population was evident within 2 min of incubation wit…
Abstract A theoretical equation has been developed to described the rate of slow crack growth in an ethylene‐hexene copolymer in terms of the basic morphological parameters. These parameters are spacing of the butyl branches, number of tie molecules, and the thickness of the lamellar crystal. Experimentally, the thick…
Several aspects of the oscillations of a gas bubble in a slightly compressible liquid are discussed by means of a simplified model based on the assumption of a spatially uniform internal pressure. The first topic considered is the linear initial-value problem for which memory effects and the approach to steady state a…
Nonlinear properties include intensity-dependent refractive index, multiphoton absorption, second and third harmonic generation, stimulated Raman and Brillouin scattering, and associated phenomena such as self-focusing, self-phase modulation, optical phase conjugation, and optical bistability. We report on a large amo…
A model is presented for the high-temperature transport properties of large-grain-size, heavily doped n-type silicon-germanium alloys. Electron and phonon transport coefficients are calculated using standard Boltzmann equation expressions in the relaxation time approximation. Good agreement with experiment is found by…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNanoscale metal oxide particles/clusters as chemical reagents. Synthesis and properties of ultrahigh surface area magnesium hydroxide and magnesium oxideSuchada Utamapanya, Kenneth J. Klabunde, and John R. SchlupCite this: Chem. Mater. 1991, 3, 1, 175–181Publication Date (Pr…
Abstract In order to relate mineralogy to sorbent efficiency, organo‐clays were prepared from reference vermiculite, illite, smectite, and kaolinite clay minerals using the organic cation hexadecyltrimethylammonium (HDTMA). Adsorption isotherms using 14 C‐HDTMA indicated stoichiometric adsorption of HDTMA up to the ca…
An ongoing program on microfabricated field-emitter arrays has produced a gated field-emitter tip structure with submicrometer dimensions and techniques for fabricating emitter arrays with tip packaging densities of up to 1.5*10/sup 7/ tips/cm/sup 2/. Arrays have been fabricated over areas varying from a few micromete…
(1991). Why proteins prefer interfaces. Journal of Biomaterials Science, Polymer Edition: Vol. 2, Festschrift in Honor of the 75th Birthday of Dr. Leo Vroman: Part I, pp. 183-202.