Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Journals

Characterization of a [(O3/2SiMe)(x)(Osi(OH)Me)(y) (OSiMe2)z] silsesquioxane copolymer resin by mass spectrometry

November 1, 2001

Author(s)

R E. Tecklenburg, William E. Wallace, H Chen

Silsesquioxanes or three-dimensional organosilicon resins, continue to generate much interest due to their unique structures and physical properties. Methyl...

Characterization of a [(O_3/2SiMe)_x(OSi(OH)Me)_y(OSiMe₂)z] Silsesquioxane Copolymer Resin by Mass Spectrometry

November 1, 2001

Author(s)

R E. Tecklenburg, William E. Wallace, H Chen

Electrospray ionization Fourier transform ion cyclotron resonance (ESI FTICR) mass spectrometry and matrix-assisted laser desorption/ionization time-of-flight...

Thermal Stability of MOCVD and HVPE GaN Layers in H₂, HCl, NH₃ and N₂

November 1, 2001

Author(s)

M A. Mastro, O M. Kryliouk, M D. Reed, T J. Anderson, Albert Davydov, Alexander J. Shapiro

This work represents a complete study of GaN annealed in H 2, HCl, NH 3 and N 2. The GaN thermal behavior was evaluated by comparison of MOCVD and HVPE samples...

Tensile Creep of Fine Grained (3-5 υ m) Ti₃SiC₂ in the 1000-1200 C Temperature Range

November 1, 2001

Author(s)

M Radovic, M W. Barsoum, T El-Raghy, Sheldon M. Wiederhorn

In this paper we report on the tensile creep behavior of fine-grained (3-5um) Ti 3SiC 2 in the 1000 C to 1200 C temperature, T, range and 10 MPa to 100 MPa...

Stabilization of the n = 3 Ruddlesden-Popper Phases: Sr₄Mn_3-xFe_xO_10-δ and Sr_4-yCa_yMn₃O_{10- δ}

November 1, 2001

Author(s)

R Chen, Martha Greenblatt, Leonid A. Bendersky

Sr 4Mn 3O 10, which crystallizes in space group Cmca, is not a Ruddlesden-Popper (RP) phase. The partial substitution of either Mn by Fe or Sr by Ca leads to a...

Growth of Submicron AlGaN/GaN/AlGaN Heterostructures by Hydride Vapor Phase Epitaxy (HVPE)

November 1, 2001

Author(s)

Denis Tsvetkov, Y Melnik, Albert Davydov, Alexander J. Shapiro, O Kovalenkov, J B. Lam, J J. Song

Multi layer AlGaN/GaN epitaxial structures were grown on SiC by HVPE method. Characterization of the grown structures was performed using SEM, SIMS, mercury...

Effect of Tangential Loading on Critical Loads for Radial-Cracking in Brittle Coatings

November 1, 2001

Author(s)

C S. Lee, Brian R. Lawn, D H. Kim

Results of Hertzian contact tests investigating the effects of superposed tangential loads on the critical conditions for radial cracking at the under-surfaces...

Characterization of 2.5 Inch Diameter Bulk GaN Grown from Melt-Solution

November 1, 2001

Author(s)

V Soukhoveev, V Ivantsov, Y Melnik, Albert Davydov, Denis Tsvetkov, K Tsvetkova, I Nikitina, A Zubrilov, A Lavrentiev, Vladimir A. Dmitriev

Crystal growth from a melt or melt-solution is a widely accepted technique for industrial-scale production of important semiconductor materials. Recently we...

From Bulk to Nanoscale Magnetism and Exchange Bias in CuO Nanoparticles

November 1, 2001

Author(s)

A Punnoose, H Magnone, M Seehra, John E. Bonevich

Detailed studies of the temperature (5 K to 350 K) and magnetic field variations (up to H = 50 k0e) of the magnetization of CuO nanoprticles of size range 37 nm...

Correlation of Positron Annihilation and Other Dynamic Properties in Small Molecule Glass-Forming Substances

November 1, 2001

Author(s)

K L. Ngai, L R. Bao, Albert F. Yee, Christopher Soles

Positron annihilation lifetime spectroscopy (PALS) measurements are performed on four widely studied small molecule glass-formers (ortho terphenyl, glycerol...

Transient Interfacial Instability in Bilayer Polymer Films As Observed by Neutron Reflectivity Studies

November 1, 2001

Author(s)

M Hayashia, TT Hashimoto, M J. Weber, H Grull, A R. Esker, Charles C. Han, Sushil K. Satija

We investigated fundamental processes involved in reactive blending of a system composed of polyamide (PA) and deuterated polysulfone having a reactive end...

2 Combinatorial Methods Polymer Science: Synthesis and Characterization

November 1, 2001

Author(s)

J C. Meredith, A P. Smith, Alamgir Karim, Eric J. Amis

Combinatorial methodologies offer the ability to efficiently measure relevant chemical and physical properties over lare regimes of varible space. We review...

Spatially Correlated Dynamics in a Simulated Glass-Forming Polymer Melt: Analysis of Clustering Phenomena

November 1, 2001

Author(s)

Y Gebremichael, T B. Schroder, Francis W. Starr, S C. Glotzer

In recent years, experimental and computational studies have demonstrated that the dynamics of glass-forming liquids are spatially heterogeneous, exhibiting...

Probe Diffusion in Thin PS Free-Standing Films

November 1, 2001

Author(s)

Y Pu, H White, Miriam Rafailovich, J Sokolov, A Patel, Christopher C. White, Wen-Li Wu, V Zaitsev, S A. Schwarz

DSIMS was performed to determine the dynamics of thin free standing polystyrene films by investigating the probe diffusion in high molecular weight polymer...

Ultrafast Time-Resolved Soft X-Ray Photoelectron Spectroscopy of Dissociating Br₂

November 1, 2001

Author(s)

L Nugent-Glandorf, M Scheer, D A. Samuels, A M. Mulhisen, E R. Grant, X Yang, V M. Bierbaum, S R. Leone

The dissociation of excited state Br 2 is probed with the novel technique of ultrafast soft x-ray photoelectron spectroscopy. Excited Br 2 molecules are...

Kinetics of C₂H Radical Reactions With Ethene, Propene, and 1-Butene Measured in a Pulsed Laval Nozzle Apparatus at T = 103 K and 296 K

November 1, 2001

Author(s)

A B. Vakhtin, Dwayne E. Heard, I W. Smith, S R. Leone

Low-temperature kinetics of the reactions of C 2H radical with ethene (k 1) propene (k 2), and 1-butane (kd3^) are studied using a pulsed Laval nozzle...

Validation of Fourier Transform Microwave Spectroscopy for Trace-Gas Analysis of Multicomponent Mixtures

November 1, 2001

Author(s)

R S. DaBell, Pamela M. Chu, Gerald T. Fraser, R D. Suenram

There is strong interest by regulatory agencies and automobile manufacturers, motivated in large part by increasingly stringent emission standards, for...

Driving Bose-Einstein-Condensate Vorticity With a Rotating Normal Cloud

November 1, 2001

Author(s)

P C. Haljan, Ian R. Coddington, P Engels, Eric A. Cornell

We have developed an evaporative cooling technique that accelerates the circulation of an ultra-cold 87Rb gas, confined in a static harmonicpotential. As a...

Matrix Isolation Study of the Interaction of Excited Neon Atoms With Allene and Propyne. Infrared Spectra of H₂CCCH₂⁺ and H₂CCCH^-

November 1, 2001

Author(s)

D Forney, Marilyn E. Jacox, C Lugez, Warren E. Thompson

When a Ne:allene or a Ne:propyne sample was codeposited at approximately 5 K with a sample of pure neon that had been excited in a microwave discharge to...

Ionization of Boron, Aluminum, Gallium and Indium by Electron Impact

November 1, 2001

Author(s)

Yong Sik Kim, Philip M. Stone

Measurements of electron impact of ionization of neutral Al, Ga, and In show large cross sections compared to other elements in the same rows of the periodic...

Use of Legendre Transforms in Chemical Thermodynamics

November 1, 2001

Author(s)

R Alberty, J M. Barthel, E R. Cohen, Michael B. Ewing, Robert N. Goldberg, E Wilhelm

The fundamental equation of thermodynamics for the internal energy U may include terms for various types of work and involves only differentials of extensive...

Convective Heat Transfer Coefficients for Near-Horizontal Two-Phase Flow of Nitrogen and Hydrogen at Low Mass and Heat Flux

November 1, 2001

Author(s)

N T. Van Dresar, James D. Siegwarth, M M. Hasan

Correlations for convective heat transfer coefficients are reported for two-phase flow of nitrogen and hydrogen under low mass and heat flux conditions. The...

Application of the Low-Loss Scanning Electron Microscope Image to Integrated Circuit Technology Part II - Chemically-Mechanically Planarized Samples

November 1, 2001

Author(s)

O C. Wells, M Mcglashen-powell, Andras Vladar, Michael T. Postek

Chemical-mechanical planarization (CMP) is a process that gives a flat surface on a silicon wafer by removing material from above a chosen level. This flat...

Electrical Linewidth Test Structures Patterned in (100) Silicon-on-Insulator for Use as CD Standards

November 1, 2001

Author(s)

Michael W. Cresswell, John E. Bonevich, Richard A. Allen, Nadine Guillaume, Lucille A. Giannuzzi, Sarah C. Everist, Christine E. Murabito, Patrick J. Shea, Loren W. Linholm

The TREC Question Answering Track

October 29, 2001

Author(s)

Ellen M. Voorhees

The Text REtrieval Conference (TREC) question answering track is an effort to bring the benefits of large-scale evaluation to bear on a question answering (QA)...

Real-Time Operating System Timing Jitter and its Impact on Motor Control

October 29, 2001

Author(s)

Frederick M. Proctor, William P. Shackleford

General-purpose microprocessors are increasingly being used for control applications due to their widespread availability and software support for non-control...

Stick-Slip Motion of a Stressed Ion Crystal

October 29, 2001

Author(s)

T B. Mitchell, John Bollinger, Wayne M. Itano, Daniel H. Dubin

Transition From Collisionless to Hydrodynamic Behavior in an Ultracold Atomic Gas

October 22, 2001

Author(s)

S D. Gensemer, D S. Jin

Relative motion in a two-component, trapped gas provides a sensitive probe of interactions. By studying the lowest frequency excitations of a two spin-state gas...

Comment on Mixture Model Description of the T-, P Dependence of the Refractive Index of Water [J. Chem. Phys. 114, 3157 (2001)]

October 22, 2001

Author(s)

Allan H. Harvey

In a recent paper modeling the refractive index of water, some data taken at the National Bureau of Standards in the 1930s are not handled correctly. The...

Crossover From First-Order to Critical Wetting: Short-Range Tricritical Wetting

October 22, 2001

Author(s)

David J. Ross, D Bonn, A I. Posazhennikova, J O. Indekeu, J Meunier

We study wetting in liquid mixtures of methanol and the n-alkanes. Mixing alkanes of different chain lengths, we can examine the crossover between critical...

Was this page helpful?