Materials Literature
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We have modeled single-atom radiation damage events in diamond by a molecular-dynamics simulation, using an empirical interatomic potential to describe the interaction between the atoms in diamond. We find that the damage threshold energy needed to displace a single atom is well above simple estimates based on the dia…
Bis(tert-butyldimethylsiloxy)- (7), bis(dimethylthexylsiloxy)- (8), bis(tri-n-hexylsiloxy)- (9), and bis(dimethyloctadecylsiloxy)silicon 2,3-naphthalocyanines (10) were prepared via substitution of the bis(hydroxy) precursor with the corresponding chlorosilane ligands and characterized by spectroscopic and combustion…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGrafting of Water-Soluble Chains onto a Polymer SurfaceEmiko Uchida, Yoshikimi Uyama, and Yoshito IkadaCite this: Langmuir 1994, 10, 2, 481–485Publication Date (Print):February 1, 1994Publication History Published online1 May 2002Published inissue 1 February 1994https://pubs…
Fluorite type HfO 2 and ZrO 2 solid solutions were prepared by doping with 8 to 14 mol% of Ho 2 O 3 and Y 2 O 3 , and their lattice parameters were determined. In both HfO 2 and ZrO 2 systems, the lattice parameters of the solid solutions containing Ho 2 0 3 were consistently greater than those containing the same amo…
Once capillary pressure and permeability are determined for saturations ranging from near zero to 100%, liquid transport related to both wicking and wetting behavior can be described by Darcy's equation. The purpose of the work reported here is to assess and develop experimental techniques that allow capillary pressur…
Photolysis of the azido complexes [Ph 3 PAuN 3 ] and [(dppe)Pd(N 3 ) 2 ] or [(Ph 3 P) 2 Pd(N 3 ) 2 ] in the presence of [Ph 3 PAuCl] affords the new heterodimetal clusters 1 and 2 , in which the twelve gold atoms form an icosahedron around a central Pd atom. These first icosahedral Au 12 clusters containing a heteroat…
Complexes of stoichiometry Fe( trzH )2( trz )X, where trzH is 1,2,4-triazole and X = BF4, ClO4, PF6, have been prepared. All three salts display temperature-induced singlet (1A1) ? quintet (5T2) transitions which are generally discontinuous and associated with a broad hysteresis loop. The salts are strongly thermochro…
The frequency response of a model mechanism for acceptor‐limited electrochemical polishing is investigated. The mechanism consists of charge‐transfer and surface‐reaction steps involving adsorbed intermediates in the absence of precipitate films with electropolishing resulting from mass‐transport limitations for a sol…
The quenching of the radiative ${\mathit{e}}^{\mathrm{\ensuremath{-}}\mathrm{\ensuremath{-}}}$${\mathit{h}}^{+}$ recombination in barium aluminoborate glass, x irradiated at 77 K, was investigated by EPR and thermoluminescence (TL) techniques as a function of an iron impurity concentration ranging from ${10}^{\mathrm{…
Commercial poly(viny1 chloride) (PVC) contains approximately 10% crystallinity. This relatively low level of order has a surprisingly significant effect on both its processing and properties. In this review, the nature of PVC crystallinity, which is very different from that found in more conventional crystalline polym…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescence of Bi3+ in gallate garnetsM. Ilmer, B. C. Grabmaier, and G. BlasseCite this: Chem. Mater. 1994, 6, 2, 204–206Publication Date (Print):February 1, 1994Publication History Published online1 May 2002Published inissue 1 February 1994https://pubs.acs.org/doi/10.1021/…
The results of an analysis of thirteen different computer programs involving 11 participants from 10 countries on eight measured glow curves originating from LiF(TLD-100) have been compared. The programs use a shape of a single glow peak which varies from program to program. Generally speaking, the better the approxim…
Abstract Several important aspects relating to the mechanism of formation of protective Cr‐based oxide films on aluminum alloy 2024‐T3 generated from CrO 3 + NaF‐containing solutions were observed with electrochemical, AES and XPS measurements. Although the film deposition rate and surface composition were very much i…
This study examines the effect of transverse thickness on the in-plane thermal conductivity of single crystal, defect-free, thin metallic films. The imposed temperature gradient is along the film and the transport of thermal energy is predominantly due to free electron motion. The small size necessitates an evaluation…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSoluble Polyimides with Polyalicyclic Structure.3. Polyimides from (4arH,8acH)-Decahydro-1t,4t:5c,8c-dimethanonaphthalene- 2t,3t,6c,7c-tetracarboxylic 2,3:6,7-DianhydrideMasatoshi Kusama, Toshihiko Matsumoto, and Toshikazu KurosakiCite this: Macromolecules 1994, 27, 5, 1117–…
An undercooled liquid exhibits crystalline fluctuations, some of which grow into crystal of macroscopic dimension, while smaller fluctuations disappear. We present a model which allows for exact analytic characterization of the inhomogeneous critical nucleus, the smallest fluctuation which will give rise to crystal gr…
The optical properties of trivalent chromium ions in ${\mathrm{La}}_{3}$${\mathrm{Ga}}_{5}$${\mathrm{SiO}}_{14}$ crystals have been investigated by means of absorption, emission, excitation, and lifetime measurements. The particular intermediate value of the octahedral crystal field Dq/B\ensuremath{\sim}2.5 causes the…
Abstract Raman and infrared spectra of solid benzyl alcohol and two partially deuterated homologues are reported for the first time. The internal vibrational modes and lattice modes of benzyl alcohol are assigned on the basis of isotopic wavenumber shifts. The spectra of solid benzyl alcohol at low temperatures are sh…
Recently we investigated the occurrence of static periodic stripes in a hybrid aligned nematic cell. Assuming that the tilt anchoring was stronger at the planar wall than at the homeotropic wall, we have found the critical thickness of the cell for the transition from planar to periodic alignment as a function of the…
Abstract In microcellular plastics, an unfoamed skin that is integral with the foamed core can be created by allowing the nucleating gas to diffuse from the surfaces of a gas saturated specimen prior to foaming. In this paper, a semi‐empirical model is proposed that predicts the skin thickness variation in microcellul…