Materials Literature
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The infrared-reflectance spectra of silica glasses were measured and analyzed with a Kramers-Kronig transformation for a better understanding of the response of silica, especially in the high-frequency region (1000--1300 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$). The silica samples were prepared by the sol-gel techn…
A novel scheme is presented for the preparation of cross-section transmission electron microscopy (TEM) specimens, with a focused ion beam (FIB). This scheme is particularly suitable for highly structured substrates, such as integrated circuits. The specimen is made by cutting a thin slice of material from the substra…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheory of block copolymer interfaces in the strong segregation limitA. N. SemenovCite this: Macromolecules 1993, 26, 24, 6617–6621Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 November 1993https://pubs.acs.org/doi/…
Abstract Crystalline silicon particles of cubic structure are formed in the plasma which is initiated in an argon‐silane mixture by a focussed 694 nm Ruby laser flash. Part of the particles can be dissolved as colloid in organic solvents. The solubilization is increased by small amounts of 1,3‐propane‐dithiol. The raw…
Cu-Co has been chosen as a model system to study phase formation during mechanical alloying in systems with components exhibiting a positive heat of mixing. Phase formation is monitored by scanning electron microscopy, x-ray diffraction, and calorimetric measurements. Although the occurrence of a single fcc Bragg patt…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSingle-crystal-to-single-crystal photodimerization of cinnamic acidVolker Enkelmann, Gerhard Wegner, Kathleen Novak, and Kenneth B. WagenerCite this: J. Am. Chem. Soc. 1993, 115, 22, 10390–10391Publication Date (Print):November 1, 1993Publication History Published online1 Ma…
Numerical calculations of thermal conductivity \ensuremath{\kappa}(T) are reported for realistic atomic structure models of amorphous silicon with 1000 atoms and periodic boundary conditions. Using Stillinger-Weber forces, the vibrational eigenstates are computed by exact diagonalization in harmonic approximation. Onl…
Calculations of mass energy-transfer and mass energy-absorption coefficients for photon energies from 1 keV to 100 MeV have been developed, based on a re-examination of the processes involved after the initial photon interaction. The probabilities for the initial interaction are from the current photon interaction cro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of pH on properties of wheat gluten and soy protein isolate filmsAristippos. Gennadios, Alice H. Brandenburg, Curtis L. Weller, and Robert F. TestinCite this: J. Agric. Food Chem. 1993, 41, 11, 1835–1839Publication Date (Print):November 1, 1993Publication History Publ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of surface-modified colloidal cadmium telluride quantum dotsTijana Rajh, Olga I. Micic, and Arthur J. NozikCite this: J. Phys. Chem. 1993, 97, 46, 11999–12003Publication Date (Print):November 1, 1993Publication History Published online1 May 200…
Epitaxial ferroelectric SrRuO3/Pb(Zr0.52Ti0.48)O3/SrRuO3 heterostructures have been fabricated employing isotropic metallic oxide electrodes on (100) SrTiO3 and (100) Si with an yttria stabilized zirconia buffer layer. The structures have been grown in situ by 90° off-axis sputtering, which allows the growth of unifor…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and RGD peptide modification of a new biodegradable copolymer: poly(lactic acid-co-lysine)Denise A. Barrera, Eric Zylstra, Peter T. Lansbury Jr., and Robert LangerCite this: J. Am. Chem. Soc. 1993, 115, 23, 11010–11011Publication Date (Print):November 1, 1993Public…
In systems that are two and three dimensional electronically, a large polaron and a small polaron are distinct types of quasiparticles. The type of polaron formed depends on which electron-lattice interaction is of primary importance. A large polaron forms when the electron-lattice interaction due to the long-range Co…
Results of a molecular dynamics simulation of a single polymer chain in a good solvent are presented. The latter is modeled explicitly as a bath of particles. This system provides a first-principles microscopic test of the hydrodynamic Kirkwood–Zimm theory of the chain’s Brownian motion. A 30 monomer chain is studied…
As a crystal is disordered, a point may be reached where the typical mean free path of phonons is so short that the wavelength and mean free path are no longer sharp concepts, and the textbook phonon-gas model for thermal conductivity breaks down. This paper proposes an alternate theory for the disordered regime, and…
A variety of spray pyrolysis (SP) techniques have been developed to directly produce ceramic powders from solutions. This paper reviews the current status of these processes in terms of the process parameters that enable the formation of particles with controlled morphology and composition. A model incorporating solut…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdsorption of proteins onto surfaces containing end-attached oligo(ethylene oxide): a model system using self-assembled monolayersKevin L. Prime and George M. WhitesidesCite this: J. Am. Chem. Soc. 1993, 115, 23, 10714–10721Publication Date (Print):November 1, 1993Publicatio…
The structural instabilities towards the formation of a charge density wave (CDW) ground state exhibited by several layered Mo and W bronzes and oxides are reviewed. It is shown that in these two-dimensional (2D) metals, including the purple bronzes A x Mo 6 O 17 (A=K, Na, Tl; x≈1), the γ and η phases of MO 4 O 11 and…
The tungsten oxides and bronzes have been extensively studied since their discovery in the last century, because of their brilliant colors and high electrical conductivity. More recently the driving interest resulted from their potential use in electrochromic displays and other electrochemical systems. Their crystalli…
A brief introduction is presented on transition metal oxide bronzes and their relationship to the phosphate tungsten bronzes; the latter compounds are the major focus of this review. The phosphate tungsten bronzes (PTB) are a new class of quasi-low-dimensional materials which exhibit charge density wave (CDW) instabil…