Results 231 to 240 of about 12,558 (259)
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Raman scattering from microcrystals
Phase Transitions, 1990Abstract This review discusses the size effects on Raman scattering from microcrystals. For ionic microcrystals, the existence of surface phonon modes is predicted from electromagnetic theories. It is shown that Raman spectroscopy is very effective to detect the surface phonon modes.
S. Hayashi, K. Yamamoto
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Fine structure of polysaccharide microcrystals
Planta, 1969Negative staining showed the presence of microcrystals in various polysaccharides. Cellulose microcrystals from Valoniopsis, Vaucheria, and an unidentified tunicate had widths of 20, 27, and 30 Å, respectively. Mannan microcrystals from Acetabularia were 10x25 Å and were oriented in linear arrays with their long axis perpendicular to the array axis ...
B C, Parker, G F, Leeper
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Luminescence polarization of CdSe microcrystals
Physical Review B, 1992We have considered theoretically the polarization of the luminescence of small CdSe microcrystals due to the hexagonal structure of the lattice. We derive the energy spectrum and wave functions of holes in spherical microcrystals. It is shown that the value of the splitting between the A and B hole states in microcrystals could be five times smaller ...
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Orthogonally Bifunctional Fluorescent Zeolite‐L Microcrystals
Advanced Materials, 2008Microcrystals of zeolite L are functionalized with two different fluorescent dyes in a spatially resolved manner. The multiple functionalities and the selective derivatization of the channel entrances and of the coat of the zeolites result in interesting photophysical behavior as well as potential uses.
Busby M. +3 more
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Recoilless Fraction in Microcrystals
Physical Review B, 1970The recoilless fraction $f$ in monoatomic microcrystals is calculated from a lattice-dynamical model. Its dependence on the physical boundary conditions at the surfaces of the crystallites is shown to follow the rule that $f$ increases with increasing stiffness of the binding to the surrounding medium.
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Nonlinearities of CuCl Microcrystals
physica status solidi (b), 1990AbstractUsing a “pump and probe” technique, a strong blue shift and a bleaching is measured of the Z3 excitonic absorption line of CuCl microcrystallites embedded in glass. These effects are attributed to exciton exciton‐interactions. They show a response time shorter than the nanosecond. This seems to be mainly due to a fast non‐radiative decay of the
P. Gilliot +3 more
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The Microcrystal Melting Transition
Molecular Simulation, 1988Abstract Metropolis Monte Carlo simulations of the melting transition of Lennard-Jones microcrystals confined to spherical cavities are reported. While 13 atom microcrystals melt continuously, larger microcrystals containing 201 and 209 atoms exhibit a first-order-like freezing transition to an HCP structure.
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Emergent nanotherapies in microcrystal-induced arthritis
International Immunopharmacology, 2018The anti-inflammatory and immunomodulatory effects of nanoparticles in several chronic diseases have been extensively researched. The aim of this review is to examine how nanoparticles modulate the inflammatory pathways that characterize the most prevalent forms of microcrystal-induced arthritis, including gout, pseudogout, and BCP-induced arthritis ...
Yessica, Zamudio-Cuevas +4 more
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Hybridized Microcrystals Composed of Metal Fine Particles and π-Conjugated Organic Microcrystals
Japanese Journal of Applied Physics, 2001We have successfully prepared hybridized microcrystals composed of polydiacetylene microcrystals and silver fine particles by means of the co-reprecipitation method, and investigated their hybridized structure and optical properties. It was revealed experimentally for the first time that the core domain of metal fine particles may interact ...
Akito Masuhara +6 more
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Morphology of ZnO microcrystals
Journal of Crystal Growth, 1977Abstract The morphology of small ZnO crystals, formed by anodic electrocrystallization of a zinc substrate, has been examined via scanning electron microscopy. The general morphology is observed to consist of a network array of discrete single crystal plates.
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