Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-purity, monodisperse TiO2 powders by hydrolysis of titanium tetraethoxide. 1. Synthesis and physical propertiesEric A. Barringer and H. Kent BowenCite this: Langmuir 1985, 1, 4, 414–420Publication Date (Print):July 1, 1985Publication History Published online1 May 2002Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLight-induced excited-spin-state trapping in iron(II) spin-crossover systems. Optical spectroscopic and magnetic susceptibility studyS. Decurtins, P. Gutlich, K. M. Hasselbach, A. Hauser, and H. SpieringCite this: Inorg. Chem. 1985, 24, 14, 2174–2178Publication Date (Print):…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetailed molecular structure of a vinyl polymer glassDoros N. Theodorou and Ulrich W. SuterCite this: Macromolecules 1985, 18, 7, 1467–1478Publication Date (Print):July 1, 1985Publication History Published online1 May 2002Published inissue 1 July 1985https://pubs.acs.org/doi…
A new method is described for preparing colloidal gold particles in any size between approximately 3 and 17 nm for electron microscopy. The gold particles are homogeneous in size (homodisperse). When bound to various proteins (e.g. IgG and protein A), the complexes were stable for long periods and suitable for affinit…
Preface 1. What is phytoplankton? 2. Mechanisms of suspension 3. Spatial and temporal distribution of phytoplankton 4. Photosynthetic activity of phytoplankton 5. Nutrients 6. Growth and survival 7. Loss process 8. Periodicity and change in phytoplankton composition Glossary and symbols References Index to lakes and r…
In 1978 it was discovered, largely through the work of Fleischmann, Van Duyne, Creighton, and their coworkers that molecules adsorbed on specially prepared silver surfaces produce a Raman spectrum that is at times a millionfold more intense than expected. This effect was dubbed surface-enhanced Raman scattering (SERS)…
The literature data on the kinetic and thermodynamic characteristics of the polycondensation of aromatic diols, diamines, tetramines, and their derivatives with tetracarboxylic acid dianhydrides and dicarboxylic acid dihalides in amide solvents are surveyed. Attention is concentrated on the analysis of the dependence…
Received 27 December 1984DOI:https://doi.org/10.1103/PhysRevLett.54.2727©1985 American Physical Society
The glass transition has historically been viewed as an anomaly involving the specific heat of supercooled liquids. It is also associated with a divergence of the relaxation times for liquid rearrangements. We have developed a new spectroscopy to study the frequency dependence of the specific heat of liquids which con…
We present here a general framework to produce quasiperiodic tilings and more general quasiperiodic patterns in $n$ dimensions corresponding to a finite number of local neighborings around each point. In particular, we give simple descriptions of the Penrose tilings of the plane and of a tiling of the three-dimensiona…
The energy versus position of a single Si adatom on a two-dimensionally infinite Al(001) substrate is calculated. The only physical approximations made are the Born-Oppenheimer approximation and the use of a local exchange-correlation potential. Computed binding energies, force constants, and bond charges for two diff…
The possibility that non-stoichiometric barium perovskite (BaFeO3−x) is formed in the very early stages of the reaction kinetics of the hexagonal M-phase ferrites (BaFe12O19) is evaluated. Samples with atomic relation Ba/Fe = 1 are heated at low and moderate temperatures (600 to 1100 °C) in air, and the collected Moss…
X-ray diffuse scattering from the plastic phase of cyclohexanol has been recorded on photographic films by the Burger precession method. We present a new theoretical model to calculate x-ray diffusion intensity including orientational and translational molecular correlations. We calculate the dielectric correlation fa…
The Raman spectra (30–3300 cm−1) of a single crystal and of polycrystalline forms of NH4SCN are presented in the temperature range 135 to −175 °C. The polarization behavior of the Raman bands reveals the antipolar arrangements of SCN− ions in the room temperature phase. Above 86.5 °C the spectra do not show polarizati…
The refractive index n(ν) and absorption coefficient α(ν) of c-cut sapphire are measured at the temperatures 5.5, 30, 60,150, 200, 250, and 300 K for frequencies between 30 and 230 cm−1. Values given for n are accurate to within 1% and those for α to within 5%. Polynomial fits are included, and evidence of multiphonon…
Temperature dependence of the dielectric constant and the ac conductivity of Fe 3 O 4 single crystal has been studied below the Verwey point of 122 K in a frequency range from 10 Hz to 10 kHz. Dielectric relaxation phenomena have been found in two temperature ranges: one appears around 30 K–50 K and the other occurs b…
A quantum-theoretical treatment is applied to calculate the cross section for emission of photons produced in inverse photoemission from an adsorbed molecule. Careful consideration of the type of potential that may be used in such calculations shows that photoemission and inverse photoemission from localized levels ma…
We present a theoretical description of the influence of conduction-electron--local-moment exchange on the properties of free carriers in antiferromagnetic semiconductors, with explicit application to EuTe. We conclude that the ferron, an electron self-trapped in a potential well formed by exchange-induced ferromagnet…
The absolute total electron scattering cross section for methane (inelastic+elastic, integrated over all angles) was measured with a time-of-flight electron transmission spectrometer for incident energies from 1.3 to 50 eV. The major discrepancies that exist between recent absolute measurements of the total cross sect…
A macroscopic model of the microcontacts in ceramic ZnO varistors was prepared by using ZnO single-crystal plates and a layer of the usual oxide additives. The electrical properties of these model contacts are very similar to those of the microcontacts. Measurements on one-sided macrocontacts require the assumption of…