Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Richard Zallen"'
Autor:
Mona P. Moret, Richard Zallen
Publikováno v:
Solid State Communications. 137:154-157
The optical absorption edge of brookite TiO2 was measured at room temperature, using natural crystals. The measurements extend up to 3.54 eV in photon energy and 2000 cm−1 in absorption coefficient. The observed absorption edge is broad and extends
Autor:
Jennifer A. Zallen, Richard Zallen
Publikováno v:
Journal of Physics: Condensed Matter. 16:S5073-S5080
Convergent extension is the cell-rearrangement process by which a developing embryo elongates to establish the head-to-tail body axis. In the early Drosophila embryo, this process occurs within a one-cell-thick epithelial layer. Using confocal micros
Publikováno v:
Solid State Communications. 124:167-170
We present a percolation study of two-dimensional crossbar networks and investigate their defect tolerance to missing crossbars. We find that the rate at which connectivity degrades in such circuits is nearly constant up to a missing-crossbar fractio
Publikováno v:
Physical Review B. 57:5715-5723
Publikováno v:
Journal of Materials Research. 12:1755-1765
Ultrafine titania particles were synthesized from titanium tetraethoxide (TEOT) dissolved in ethanol. The concentration of water and of the soluble polymer hydroxypropylcellulose (HPC) were varied to control particle size. The HPC adsorbed onto the t
Publikováno v:
Physical Review B. 55:7014-7017
Polarization-dependent far-infrared reflectivity measurements were carried out on single crystals of anatase ${\mathrm{TiO}}_{2}$ . The results were analyzed to yield the dielectric dispersion properties of anatase in the lattice fundamentals regime.
Autor:
Richard Zallen, C. J. Doss
Publikováno v:
Physical Review B. 48:15626-15637
A systematic Raman-scattering investigation has been carried out on sol-gel alumina prepared by the hot-water hydrolysis and condensation of Al(${\mathrm{OC}}_{4}$${\mathrm{H}}_{9}$${)}_{3}$, the Yoldas process, as a function of process variables suc
Autor:
Nancy L. Ross, Adam F. Wallace, Kevin M. Rosso, David F. Cox, Richard Zallen, Robert T. Downs, Gerald V. Gibbs
Publikováno v:
The journal of physical chemistry. A. 114(23)
The calculated electron density distribution for orpiment, As(2)S(3), reveals that As-S, S-S, and As-As bond paths are associated with the experimental interlayer directed bonded interactions detected in a combined infrared and Raman study. The succe
Autor:
Richard Zallen
Publikováno v:
Journal of Non-Crystalline Solids. 141:227-232
The optical evidence that ion-implanted GaAs materials are nanocomposites of amorphous GaAs (a-GaAs) and nanocrystalline GaAs ( μ c-GaAs) is reviewed and analyzed. A key role in this assessment is played by the observation of Raman-scattering two-mo
Publikováno v:
Thin Solid Films. 366:8-10
Pulsed laser deposition has been used to prepare thin films of TiO2 on silicon and other substrates. X-ray diffraction and Raman scattering results show that brookite is the main phase present in the films. Brookite has not previously been reported f