Materials Literature
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<italic>The Electronic Structure and Chemistry of Solids</italic> shows how the electronic structures and properties of solids can be described in terms familiar to chemists. Recent years have seen a considerable growth of interest in chemical aspects of the electronic structure of solids. The first three chapters giv…
During a controlled mercerization of ramie cellulose, the cellulose I crystal structure is irreversibly converted to cellulose II through several crystalline alkali-cellulose complexes. The crystal structures of three of the complexes -- Na-celluloses I, IIB, and IV -- are providing information on the characteristics…
The hypothesis that all native celluloses are composites of two crystalline allomorphs, Iα and Iβ, is further explored using solid state 13 C NMR techniques. Spectra of several algal and higher plant celluloses and the effects of acid hydrolysis and mechanical beating are investigated. No significant alteration of the…
An investigation to study molecular orientation and polymorphy in cellulose fibers, and to further assign the bands in the vibrational spectrum of cellulose was conducted utilizing the Raman microprobe. The microprobe allows spectra to be recorded from domains as small as 1 micrometer and thereby greatly increases the…
The temperature and magnetic field dependence of the magnetization and susceptibility of single-crystal decamethylferrocenium tetracyanoethenide (DMeFc TCNE) demonstrate that this material is the first molecular compound with a ferromagnetic ground state. A spontaneous magnetization is observed for T<4.8 K. The res…
Cahn's scheme for simulating the morphology of isotropic spinodal decomposition is adapted to a mathematical model of bicontinuous partitioning of space by interfacial pairs that may be useful for problems of microdispersed and microporous systems distinguished by a morphology with a well defined length scale, includi…
A natural single crystal of zircon, ZrSiO(4,) from Sri Lanka exhibited zonation due to alpha-decay damage. The zones vary in thickness on a scale from one to hundreds of micrometers. The uranium and thorium concentrations vary from zone to zone such that the alpha-decay dose is between 0.2 x 10(16) and 0.8 x 10(16) al…
This book introduces the reader to methods of selecting materials for engineering applications. With the rapid growth in the variety of manufacturing materials available, the choice of the optimum material for an engineering design is of increasing importance and difficulty. Materials have to be chosen that satisfy se…
We describe the linear and nonlinear properties of a new polymer composite, which uses a ferroelectric PVDF copolymer host in which an optically nonlinear low-molecularweight guest is dissolved and subsequently aligned using a room-temperature poling process. We have measured the frequency-doubling coefficient d33 of…
The disadvantage of electrodeposited Cu2O films on opaque substrates regarding the measurement of their transmittance and optical absorption coefficient is overcome by a successful and reliable procedure of transferring the films onto glass slides. The method can be applied to other electrodeposited films. An accurate…
We investigate how the initial formation of an oxide layer on a metal surface can effect the further incorporation of oxygen into the metal. In particular, we show that the formation of NbO on a Nb surface dramatically increases the potential barrier for oxygen incorporation. On Cu the formation of an oxide layer redu…
The formation of hydroxyl due to reaction of a silica glass made by the modified chemical vapor deposition process with hydrogen has been studied for temperatures between 200 and 900 °C. The glass is treated under 1 atm of hydrogen, which diffuses into and reacts with the glass. For treatment temperatures between 900…
We examine two wave functions which have recently been found for electrons in quasiperiodic systems, and which can be shown to satisfy an exact self-similarity relation---closely related to the self-similarity of the quasiperiodic lattice itself. The first wave function is for the ground state of an electron on a two-…
Au-dessus de la temperature de transformation de phase antiferro-electrique (Tc=148 K), NH 4 H 2 PO 3 cristallise avec le groupe d'espace I42d (R=1,7%). En dessous de Tc, le compose cristallise avec le groupe d'espace P2 1 2 1 2 1 (R=3,4%)
Analogous to the treatment of the spin-correlated crystal field, a new type of lanthanide correlation crystal field, which depends on the relative orientations of the individual 4f electron orbital angular momenta and the total orbital angular momentum, is postulated. Associated sets of parameters have been obtained f…
Through observation of the optical second harmonic generation, the stress-induced ferroelectric transition temperature of SrTiO 3 was determined as a function of the applied uniaxial stress along the [100] direction. The characteristics of the temperature-stress phase diagram are in agreement with the theoretical pred…
The spectra of 3 d photoemission, valence photoemission and BIS in Ce 2 O 3 are analyzed theoretically by using the filled band Anderson model. The calculated spectra are in satisfactory agreement with experimental data by choosing appropriately the parameter values in the model. The characteristic features of these s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnalysis of synthetic polymersCharles G. Smith, Richard A. Nyquist, Nels H. Mahle, Patrick B. Smith, Steven J. Martin, and Andrew J. PasztorCite this: Anal. Chem. 1987, 59, 12, 119–141Publication Date (Print):June 15, 1987Publication History Published online1 May 2002Publish…
A systematic study of the effects of Co substitution on the crystal structure and magnetic anisotropy of Y2Fe14−xCoxB and Nd2Fe14−xCoxB has been carried out in order to clarify the different roles and contributions to the anisotropy of both rare earth and transition metals. The substitution of Co leads to an enhanceme…
Electron-nuclear double-resonance (ENDOR) spectra of undoped cis-rich (CH${)}_{\mathrm{x}}$ at low temperatures are consistent with the spin-density distribution of the soliton predicted for a finite on-site Coulomb energy. The ratio of the peak value of the negative spin density \ensuremath{\rho}(1) to that of the po…