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Journals

A Phase-Field Model With Convection: Sharp-Interface Asymptotics

May 1, 2001

Author(s)

D M. Anderson, Geoffrey B. McFadden, A A. Wheeler

We have previously developed a phase-field model of solidification that includes convection in the melt. This model represents the two phases as viscous liquids...

Silicoboron-Carbonitride Ceramics: A Class of High Temperature, Dopable Electronic Materials

May 1, 2001

Author(s)

P A. Ramakrishnan, Y T. Wang, Davor Balzar, L A. An, C Haluschka, R Riedel, A M. Hermann

The structure and electronic properties of polymer-derived silicoboroncarbonitride ceramics are reported. Analysis of the short-range order using the radial...

Growth and Characterization of Large Area Cu(In, Ga) Se₂ Films

May 1, 2001

Author(s)

A M. Hermann, Carlos A. Gonzalez, P A. Ramakrishnan, Davor Balzar, C H. Marshall, J N. Hilfiker, T Tiwald

Large area thin films of Cu(In,Ga)Se 2 (CIGS) were grown by sequential sputtering. Photovoltaic cells have been fabricated using these films and the performance...

Cracking of Porcelain Coatings Bonded to Metal Substrates of Different Modulus and Hardness

May 1, 2001

Author(s)

H Zhao, X Z. Hu, M T. Bush, Brian R. Lawn

A preceding study of contact damage in a bilayer system consisting of a porcelain coating on a stiff Pd-alloy substrate is here expanded to investigate the role...

Multiple Lateral Length Scales in Phase-Separating Thin Film Polymer Blends

May 1, 2001

Author(s)

Haonan Wang, R J. Composto, Erik K. Hobbie, Charles C. Han

The interplay of phase separation, preferential wetting, and capillary instability in thin film polymer blends is investigated using composition-profiling and...

Chemical Mapping of Patterned Polymer Photoresists by Near-Field Infrared Microscopy

May 1, 2001

Author(s)

B Dragnea, J Preusser, J Szarko, L A. McDonough, S R. Leone, W D. Hinsberg

Latent images obtained by deep-ultraviolet (DUV) patterning and post-exposure bake in the polymer system poly(t-butylmethacrylate) resist/triphenyl sulfonium...

Defect Controlled Diffusion in the Epitaxial Growth of Germanium on Si(100)

May 1, 2001

Author(s)

C L. Berrie, B Liu, S R. Leone

The growth of germanium films on Si(100) substrates prepared by two different methods is studied using atomic force microscopy and reflection high energy...

Molecular Fluorescence in the Vicinity of a Nanoscopic Probe

May 1, 2001

Author(s)

H F. Hamann, M Kuno, Alan Gallagher, David Nesbitt

The dramatic modifications of molecular fluorescence in the proximity of a sharp nanoscopic probe is investigated by an apertureless or antenna-based near-field...

Electron-Hole Correlations in Semiconductor Quantum Dots With Tight-Binding Wave Functions

May 1, 2001

Author(s)

S Lee, P. Jonsson, J W. Wilkins, Garnett W. Bryant, G Klimeck

The electron-hole states of semiconductor quantum dots are investigated within the framework of empirical tigh-binding descriptions for Si, as an example of an...

Electron and Nuclear Spin Interactions in the Optical Spectra of Single GaAs Quantum Dots

May 1, 2001

Author(s)

R W. Gammon, A L. Efros, T A. Kennedy, M Rosen, D S. Katzer, D Park, Steven W. Brown, V L. Korenev, I A. Merkulov

Fine and hyperfine splittings arising from electron, hole and nuclear spin interactions in the magneto-optical spectra of indivisual localized excitons are...

Coordinate-Space Approach to the Bound-Electron Self-Energy: Self-Energy Screening Calculation

May 1, 2001

Author(s)

Paul Indelicato, Peter Mohr

The self-energy screening correction is evaluated in a model in which the effect of the screening electron is represented as a first-order perturbation of the...

A Common-Path Heterodyne Interferometer for Surface Profiling in Microelectronic Fabrication

May 1, 2001

Author(s)

E J. Klein, A P. Ramirez, John L. Hall

We describe the design of a common-path heterodyne laser interferometer for the surface profiling of micron-sized photopatterned features during the...

Lifetimes, Branching Fractions, and Oscillator Strengths of Doubly Ionized Tungsten

May 1, 2001

Author(s)

M Schultz-Johanning, R Kling, R Schnabel, M Kock, ZZ Li, H Lundberg, S Johansson

A first set of W III oscillator strengths has been obtained from combined lifetime and brancing fraction measurements. The branching fractions in the wavelength...

Controlled Collapse of a Bose-Einstein Condensate

May 1, 2001

Author(s)

J L. Roberts, N R. Claussen, S L. Cornish, E A. Donley, Eric A. Cornell, C E. Wieman

The point of instability of a Bose-Einstein condensate (BEC) due to attractive interactions was studied. Stable 85Rb BECs were created and then caused to...

Rotational Spectrum of Sarin

May 1, 2001

Author(s)

H Walker, R D. Suenram, A C. Samuels, J O. Jensen, M W. Ellzy, J M. Lochner, D Zeroka

To demostrate the possibilities of using molecular-beam Fourier-transform microwave spectroscopy as a measurement technique to unambiguously detect and monitor...

An Object-Oriented Manufacturing Process Model for Preliminary Design and Process Planning Integration

May 1, 2001

Author(s)

Shaw C. Feng, Eugene Song

An open, neutral manufacturing process object model has been developed. The main purpose is to enable software interoperability between manufacturing...

Effects of Nonlinear Diode Junction Capacitance on the Nose-to-Nose Calibration

May 1, 2001

Author(s)

Kate Remley, Dylan Williams, Donald C. DeGroot, Jan Verspecht, John Kerley

We examine the effects of nonlinear diode junction capacitance on the fundamental premise of the noise-to-nose calibration, that the kickout is identical in...

Surface Analysis Studies of Yield Enhancements in Secondary Ion Mass Spectrometry by Polyatomic Projectiles

May 1, 2001

Author(s)

E Fuoco, J Greg Gillen, M Wijesundara, William E. Wallace, L Hanley

In this paper examine the mechanism of secondary ion yield enhancements previously observed for polyatomic projectiles by measuring the weight loss, volume loss...

Computational Study of the Reactions of Methane with XO Radicals (X = F, Cl, or Br): Implications in Combustion Chemistry

May 1, 2001

Author(s)

F Louis, Thomas C. Allison, Carlos A. Gonzalez, J P. Sawerysyn

Theoretical calculations were carried out on the H-atom abstraction reaction from methane by XO (X = F, Cl or Br) radicals attack. Geometry optimizations and...

Measurement and Application of ¹H-¹⁹F Dipolar Couplings in the Structure Determination of 2'-Fluorolabeled RNA

May 1, 2001

Author(s)

B. Luy, John Marino

Residual dipolar couplings can provide powerful restraints for determination and refinement of the solution structure of macromolecules. The application of...

Copper-Catalyzed Radiolytic Reduction of CO₂ to CO in Aqueous Solutions

May 1, 2001

Author(s)

J Grodkowski, Pedatsur Neta

Radiolysis of aqueous solutions containing CO 2 and Cu(II) ions under reducing conditions leads first to reduction of the Cu(II) and then to formation of CO...

Electron Transport, Ionization, and Attachment Coefficients in C₂F₄ and C₂F₄/Ar Mixtures

May 1, 2001

Author(s)

Amanda N. Goyettes, G. de Hann, Yicheng Wang, Loucas G. Christophorou, James K. Olthoff

This is a summary report of the paper to be published in the Journal of Chemical Physics. Measurements of electron transport, effective ionization, and...

Evolution of Morphology and Structure During Crystallization and Melting in Syndiotactic Polypropylene

May 1, 2001

Author(s)

Z G. Wang, B S. Hsiao, Charles C. Han

Structure and morphology development during isothermal crystallization and subsequent melting of syndiotactic polypropylene (sPP) was studied by time-resolved...

Nonempirical Analysis of the Nature of Catalytic Effects in Ribonuclease A Active Site

April 30, 2001

Author(s)

P Kedzierski, W A. Sokalski, Morris Krauss

The physical nature of the catalytic activity exerted by various ribonuclease A active site constituents is analyzed in terms of the differential transition...

Progress Under The Next Generation Fire Suppression Technology Program (NGP) In FY2000

April 26, 2001

Author(s)

Richard G. Gann

The Department of Defense's Next Generation Fire Suppression Technology Program (NGP) has completed its fourth year of research with a revised goal to develop...

Poly(ethylene-co-acrylic acid) Stationary Phases for the Separation of Shape-Constrained Isomers

April 15, 2001

Author(s)

J. Wegmann, K. Albert, M. Pursch, Lane C. Sander

Hybrid glass substrates for waveguide device manufacture

April 15, 2001

Author(s)

Samuel D. Conzone, Joseph S. Hayden, David S. Funk, Alexana Roshko, D. L. Veasey

Hybrid glass substrates composed of active (ER/Yb co-doped) and passive phosphate glass were prepared by a novel, low temperature joining process. The resulting...

High Precision Comparison Between SNS and SIS Josephson Voltage Standards

April 15, 2001

Author(s)

Blaise Jeanneret, Alain Rufenacht, Charles J. Burroughs

Recently, a new Josephson voltage standard based on a 1 V programmable chip provided by the National Institute of Standards and Technology (NIST) was...

Optoelectronic Device Performance on Reduced Threading Dislocation Density GaAs/Si

April 15, 2001

Author(s)

P. H. Taylor, W. A. Jesser, J. Bradshaw, M. Lara-Taysing, R. P. Leavitt, G. Simonis, W. Chang, W. W. Clark, Kristine A. Bertness

A technique for the heteroepitaxy of GaAs/Si films having reduced threading dislocation density is presented. The important attribute of this technique is the...

The Structure of the T127L/S128A Mutant of cAMP Receptor Protein Facilitates Promoter Site Binding

April 6, 2001

Author(s)

S. Chu, M. Tordova, G L. Gilliland, I Gorshkova, Y. Shi, S. Wang, Frederick P. Schwarz

The x-ray crystal structure of the cAMP-ligated T127L/S128A double mutant of cAMP receptor protein (CRP) was determined to a resolution of 2.2 . Although this...

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