Now showing items 31-40 of 868
Highly sensitive optical response of optical fiber long period gratings to nanometer-thick ionic self-assembled multilayers
(AIP Publishing, 2005-05-01)
Ionic self-assembled multilayers deposited on long period fiber gratings (LPGs) yield dramatic resonant-wavelength shifts, even with nanometer-thick films. Fine control of the refractive index and the thickness of these ...
Direct measurement of magnetoelectric exchange in self-assembled epitaxial BiFeO3-CoFe2O4 nanocomposite thin films
(AIP Publishing, 2009-05-01)
We report the direct measurement of a magnetoelectric (ME) exchange between magnetostrictive CoFe2O4 nanopillars in a piezoelectric BiFeO3 matrix for single-layer nanocomposite epitaxial thin films grown on (001) SrTiO3 ...
Ground state monoclinic (M-b) phase in (110)(c) BiFeO3 epitaxial thin films
(AIP Publishing, 2006-11-01)
The lattice structure of (110)-oriented BiFeO3 epitaxial thin layers has been identified by synchrotron x-ray diffraction. By using (221) and (22 (1) over bar) peaks in the (HHL) zone, a ground state monoclinic M-b phase ...
Dislocation pinning effects on fracture behavior: Atomistic and dislocation dynamics simulations
(American Physical Society, 2002-10-01)
We introduce an approach in which results from atomistic simulations are combined with discrete dislocation dynamics simulations of crack-tip plasticity. The method is used to study the effects of dislocation pinning due ...
Stochastic simulation of enzyme-catalyzed reactions with disparate timescales
(CELL PRESS, 2008-10-01)
Many physiological characteristics of living cells are regulated by protein interaction networks. Because the total numbers of these protein species can be small, molecular noise can have significant effects on the dynamical ...
Determination Of The Thermal Offset Of The Eppley Precision Spectral Pyranometer
(Optical Society of America, 2001-10-01)
Eppley's precision spectral pyranometer (PSP) is used in networks around the world to measure down-welling diffuse and global solar irradiance at the surface of the Earth. In recent years several studies have shown significant ...
Three intrinsic relationships of lattice parameters between intermediate monoclinic M-C and tetragonal phases in ferroelectric Pb (Mg1/3Nb2/3)(1-x)Ti-x O-3 and Pb (Zn1/3Nb2/3)(1-x)Ti-x O-3 near morphotropic phase boundaries
(American Physical Society, 2006-01-25)
Systematic analysis of extensive experimental data confirms the theoretical prediction of three intrinsic relationships of lattice parameters between the recently discovered intermediate monoclinic M-C phase and the ...
Diffraction theory of nanotwin superlattices with low symmetry phase
(American Physical Society, 2006-09-18)
A nanotwin diffraction theory is developed. It predicts an adaptive diffraction phenomenon, where the Bragg reflection peaks are determined by coherent superposition of scattered waves from individual twin-related nanocrystals ...
Large piezoresistivity phenomenon in SiCN-(La,Sr)MnO3 composites
(AIP Publishing, 2009-02-01)
We present the results on SiCN-(La,Sr)MnO3 (LSMO) composites correlating the observed large piezoresistance behavior with the microstructural features and defect chemistry. Scanning electron microscopy characterization ...
The Connection, Winter 2008
(Virginia Tech, 2008)
This is a publication for the alumni of the Chemical Engineering Department at Virginia Tech.