Materials Literature
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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…
The physical properties of the low dimensional molybdenum bronzes showing charge density wave (CDW) instabilities are reviewed. The mechanisms of the Peierls transition, CDW and spin density wave (SDW) instabilities are first introduced. The properties of the quasi-one-dimensional (1D) blue bronze, A 0.30 MoO 3 , incl…
The formation of high-quality thin films of polytetrafluoroethylene (PTFE) is important in many applications ranging from material reinforcement to molecular electronics. Laser ablation, a technique widely used to deposit a variety of inorganic materials, can also be used as a simple and highly versatile method for fo…
The lattice parameters a, b and c of TmCu 2 have been measured in the temperature range from 4.2 K up to 300 K using X-ray powder diffraction. The influence of the crystal field on the thermal expansion in TmCu 2 in the paramagnetic region has been determined by comparing the thermal expansion of the non-magnetic YCu…
It is shown that there exists a numerical relationship between the position of the first sharp diffraction peak, Q 1 , and the first interatomic distance, r 1 , which obeys a simple equation d=ar 1 +b where d=2 pi /Q 1 is the equivalent distance and the coefficients (a, b) specify the group of amorphous substances-gla…
Dielectric and thermodynamic properties have been investigated in isotopically mixed crystals ${\mathrm{K}}_{3}$${\mathrm{D}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{H}}_{\mathit{x}}$(${\mathrm{SO}}_{4}$${)}_{2}$ with isolated hydrogen bonds interconnecting the dimeric ${\mathrm{SO}}_{4}^{2\mathrm{\ensuremath{-…