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Journals

Measuring Bimodal Crystallographic Texture in Ferroelectric PZT Thin Films

February 1, 2000

Author(s)

Mark D. Vaudin, G R. Fox

A powder x-ray diffraction method has been developed to measure the volume fraction of (111), (100), and randomly oriented PZT in 200 nm thick films used for...

High Speed Grinding of Silicon Nitride With Electroplated Diamond Wheels, Part 2: Wheel Topography and Grinding Mechanisms

February 1, 2000

Author(s)

T W. Hwang, Christopher J. Evans, S Malkin

This is the second in a series of two papers concerned with high speed grinding of silicon nitride with electroplated diamond wheels. In a companion paper, it...

Crystallization and 1.1 Angstrom Diffraction of Chorismate Lyase From Escherichia Coli

February 1, 2000

Author(s)

C Stover, M P. Mayhew, Marcia J. Holden, A Howard, David Travis Gallagher

Clorismate pathway enzymes are important as producers of nonnucleotide aromatic compounds. The enzyme chorismate layase from Escherichia coli has been...

Ferromagnetic Resonance Detection with a Torsion-mode Atomic-force Microscope

February 1, 2000

Author(s)

M. Loehndorf, John M. Moreland, Pavel Kabos

We have developed a ferromagnetic resonance (FMR) instrument based on a torsion-mode atomic-force microscope (AFM). The instrument measures the torque on a...

Accuracy of RF Material Characterization Measurements Performed in the Stripline Cavity Resonator

February 1, 2000

Author(s)

Claude Weil, Chriss A. Jones, Y. Kantor, John H. Grosvenor Jr

We examine the sccuracy of the air-filled stripline cavity in measuring the dielectric and magnetic properties of bulk materials in the frequency range of 150...

Efficient Detection of Resonance in Anechoic Chambers Using the Matrix Pencil Method

February 1, 2000

Author(s)

B. Fouresti, Z. Altman, Motohisa Kanda

In a previous paper, we have presented a method for evaluating the performance of anechoic chambers by analyzing the S-parameters of a system comprising two...

The Elastic Constants of Single Crystal Beta-Si₃N₄

February 1, 2000

Author(s)

R Vogelgesang, M Grimsditch, Jay S. Wallace

Using Brillouin scattering, we have determined the five independent elastic constants of Β-Si 3N 4 single crystals. They are (in units of GPa) c 11 = 433(3), C...

New Calcium Tantalate Polytypes in the System Ca₂Ta₂O₇ - Sm₂Ti₂O₇

February 1, 2000

Author(s)

I E. Grey, Robert S. Roth

New calcium tantalate polytypes, with weberite related structures have been prepared by doping Ca 2Ta 2O 7 with Sm 2Ti 2O 7. Trigonal 6-layer (6T) and...

Hole State Density of La_1-xSr_xCoO^d3-Δ} (0less then or equal to}xless then or equal to}0.5) Across the Insulator/Metal Phase Boundary

February 1, 2000

Author(s)

A R. Moodenbaugh, B Nielson, S Sambasivan, Daniel A. Fischer, T Friessnegg, S Aggarwal, R Ramesh, B Pfeffer

The oxygen K near edge x-ray absorption fine structure (NEXAFS) of polycrystalline and film La1-xSrxCoO3-d at room temperature was studied using fluorescence...

Subsolidus Phase Relations and Dielectric Properties in the SrO-Al₂O₃-Nb₂O₅ System

February 1, 2000

Author(s)

Julia Y. Chan, Igor Levin, Terrell A. Vanderah, Richard G. Geyer, Robert S. Roth

Subsolidus phase equilibria in the SrO-Al 2O 3-Nb 2O 5 system were determined by synthesis of 75 compositions in air in the temperaturerange 1200-1600 C. Phase...

Temperature Dependence of Molecular Orientation on the Surfaces of Semi-Fluorinated Polymer Thin Films

February 1, 2000

Author(s)

Jan Genzer, E Sivaniah, E K. Kramer, J G. Wang, H Koerner, K Char, Christopher K. Ober, B M. DeKoven, Robert A. Bubeck, Daniel A. Fischer, S Sambasivan

Near-edge X-ray absorption fine structure is used to investigate the temperature dependence of molecular orientation of semi-fluorinated liquid crystalline (SF...

Properties of Nanoporous Silica Thin Films Determined by High-Resolution X-Ray Reflectivity and Small-Angle Neutron Scattering

February 1, 2000

Author(s)

Wen-Li Wu, William E. Wallace, Eric K. Lin, G W. Lynn, Charles J. Glinka, E T. Ryan, H M. Ho

A new methodology based on a novel combination of a high-resolution specular x-ray reflectivity and small-angle neutron scattering has been developed to...

Thermal and Acoustic Pulse Studies of Space-Charge Profiles in Electron-Irradiated Fluoroethylene Propylene

February 1, 2000

Author(s)

P Bloss, A S. DeReggi, G M. Yang, G M. Sessler, H Schafer

We report complementary studies of space charge distributions in electron-beam irradiated fluoroethylene propylene (FEP) thicknesses of 13 and 26 m) using the...

Probing the Cyclic Transition State in the Reaction O(³P) + Alkyl Iodides to Form HOI: Electronic, Steric and Thermodynamic Factors Influencing the Reaction Pathway

February 1, 2000

Author(s)

J P. Reid, C X. Qian, S R. Leone

Electronic, steric and thermodynamic factors governing the reaction of O[ 3P) with alkyl iodides to yield HOI are probed by time-resolved Fourier transform...

Contact Transformations and Determinable Parameters in Spectroscopic Fitting Hamiltonians

February 1, 2000

Author(s)

M A. Mekhtiev, Jon T. Hougen

In recent least-squares fits of torsion-rotation spectra of acetaldehyde and methanol it was found possible to adjust more fourth-order parameters than would be...

Characterization of Dynamical Produce-State Distributions by Spectral Extended Cross-Correlation: Vibrational Dynamics in the Photofragmentation of NH₂D and ND₂H

February 1, 2000

Author(s)

J P. Reid, R A. Loomis, S R. Leone

The spectral cross-corrrelation method [Jacobson et al., J Chem. Phys. 107, 8349 (1997)], developed for the identification and extraction of spectroscopic...

Striking Anharmonic Resonances in N₂O₄: Supersonic Jet Fourier Transform Spectra at (13.3, 7.9, 5.7, and 3.2) Mu m

February 1, 2000

Author(s)

M Hepp, R Georges, Martin Herman, J.- M. Flaud, Walter J. Lafferty

The spectrum of N 2O 4 has been obtained in the (3.2, 5.7, 7.9, and 13.3) m regions, using a supersonic slit jet system coupled to a Fourier transform...

Nonexponential Blinking Kinetics of Single CdSe Quantum Dots: A Universal Power Law Behavior

February 1, 2000

Author(s)

M Kuno, D P. Fromm, H F. Hamann, Alan Gallagher, David Nesbitt

We have studied the fluorescence intermittency of single CdSe quantum dots (17-29 radius) overcoated with ZnS. Optical measurements were made using a confocal...

Competition Between Intra-and Inter-Molecular Hydrogen Bonding: Effect on Para/Ortho Adsorptive Selectivity for Substituted Phenols

February 1, 2000

Author(s)

A J. Glemza, K L. Mardis, A A. Chaudhry, M K. Gilson, G F. Payne

This study examines the molecular basis for para/ortho selectivity in the adsorption of two phenol derivatives from a nonpolar solvent onto an acrylic ester...

Electrokinetic Analyzers

February 1, 2000

Author(s)

P Todd, J J. Pellegrino

Electrokinetic analysis is a family of techniques for estimating the charge on solid surfaces, macroscopic particles, colloidal species, and macromolecular...

Low-Frequency Noise of YBCO/Au Junctions

February 1, 2000

Author(s)

Y Xu, John (Jack) W. Ekin, Cameron C. Clickner

We have fabricated ex-situ C-axis YBCO/au junctions with low contact resistivities.

Setting the Standards

February 1, 2000

Author(s)

B C. Collins, W G. Leight

This invited article reviews the nature of the pluralistic standards system in the United States and its important relationships to product development, global...

An Internet Database for Thermal Transmission Properties of Insulating and Building Materials

January 31, 2000

Author(s)

Robert R. Zarr, G R. Dalton

The source of the data is the collection of thermal conductivity data produced by NIST from 1933 to 1983 using their 200 mm guarded-hot-plate apparatus. During...

The Case for Simulation-Based Evaluation of Ubiquitous Computing Environments

January 25, 2000

Author(s)

Alden A. Dima, L P. Clarletta

Ubiquitous computing (a.k.a. pervasive computing) is ill-defined due to its novelty and the community's current emphasis on its technological aspects. This can...

Orientation of Surface Bound Proteins Studied by Near Edge X-Ray Absorption Fine Structure

January 25, 2000

Author(s)

L Gamble, J R. Long, P S. Stayton, Daniel A. Fischer, S Sambasivan, David G. Castner

The orientation of surface bound proteins may play an important role in the function and properties of materials to which they are adsorbed. Near edge...

Asymmetry in Elementary Events of Magnetization Reversal in Ferromagnetic/Antiferromagnetic Bilayers

January 24, 2000

Author(s)

Valerian I. Nikitenko, V S. Gornakov, Alexander J. Shapiro, Robert D. Shull, K Liu, S M. Zhou, C L. Chien

Real-time magneto-optical indicator film images reveal distinct asymmetry in the motion of a single domain wall in a wedged-NiFe/uniform-FeMn bilayer due to the...

Micromachined Convective Accelerometers in Standard Integrated Circuits Technology

January 24, 2000

Author(s)

V. Milanovic, E. D. Bowen, Mona E. Zaghloul, N. H. Tea, John S. Suehle, B. Payne, Michael Gaitan

Interrogating Unsupported Lipid Bilayers With Scanning Confocal Single-Molecule Fluorescence Microscopy

January 23, 2000

Author(s)

D L. Burden, John J. Kasianowicz

We describe the use of scanning confocal fluorescence microscopy to probe the structure and temporal dynamics of unsupported planar lipid bilayer membranes. At...

Pressure Dependence of Instabilities in Perovskite PbZrO₃

January 21, 2000

Author(s)

Eric J. Cockayne, K M. Rabe

We have computed the frequencies of selected normal modes in perovskite PbZrO 3 (PZ) as a function of lattice parameter using local density functional theory...

Generation of Quasicrystals Via a Single Cluster

January 21, 2000

Author(s)

Eric J. Cockayne

We present a columnar cluster with 46 atoms per repeat distance which forces a quasicrystal when space is filled by interpenetrating copies of itself. The...

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