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Displaying 726 - 750 of 1900

Ergodic Convergence Times For Molecular Liquids

January 22, 2010
Author(s)
Raymond D. Mountain
A problem common to all molecular dynamics and Monte Carlo simulations used to estimate fluid properties is how to decide when adequate sampling of the phase space of the system has been realized. One procedure for addressing the sampling question is to

Solvent Retention In Thin Spin-Coated Polystyrene And Poly(Methyl Methacrylate) Homopolymer Films Studied By Neutron Reflectometry

January 19, 2010
Author(s)
Xiaohua Zhang, Kevin G. Yager, Shuhui Kang, Nathaniel J. Fredin, Bulent Akgun, Sushil K. Satija, Jack F. Douglas, Alamgir Karim, Ronald L. Jones
We utilize neutron reflectometry (NR) to probe the amount of residual solvent inside thin polystyrene (PS) and poly(methyl methacrylate) (PMMA) films spin-coated from deuterated toluene polymer solutions onto silicon substrates . The effect of thermal

Density and Speed of Sound Measurements of Hexadecane

January 7, 2010
Author(s)
Stephanie L. Outcalt, Arno R. Laesecke, Tara J. Fortin
The density and speed of sound of hexadecane have been measured using two instruments. Both instruments use the vibrating-tube method for measuring density. Ambient pressure (83 kPa) density and speed of sound measurements were carried out with a rapid

Magnetic connectors for microfluidic applications

January 1, 2010
Author(s)
Francisco J. Atencia, Gregory A. Cooksey, Andreas Jahn, Justin M. Zook, Wyatt N. Vreeland, Laurie E. Locascio
We present a new type of connector based on a simple idea: using a ring magnet on one side of the microfluidic chip and a disc magnet on the other side to provide the interfacial force necessary to provide a sealed connection between tubing or needles and

Nanoelectronic Fabrication with Flip Chip Lamination

December 15, 2009
Author(s)
Mariona Coll Bau, Curt A. Richter, Christina Hacker
Nanoelectronic fabrication with Flip chip lamination Mariona Coll, CA Richter, CA Hacker, Colloquium Catalan Institute of Nanoscience and Nanotechnology CIN2, Barcelona Spain, Dec 2009.

Determination of Elements in SRM Soil 2709a by Neutron Activation Analysis

December 1, 2009
Author(s)
Rick L. Paul, Elizabeth A. Mackey, Rolf L. Zeisler, Rabia Oflaz, Bryan E. Tomlin
A combination of instrumental neutron activation analysis (INAA) and prompt gamma-ray activation analysis (PGAA) was used to value assign 35 elements in SRM soil 2709a (San Joaquin Soil). INAA with counting of short-lived radioisotopes was used for

Ultra-Sensitive Optical Measurements of High-J Transitions in the O2 A-band

November 24, 2009
Author(s)
Daniel K. Havey, Joseph T. Hodges, David A. Long, Mitchio Okumura, Charles E. Miller
We report frequency-stabilized cavity ring-down spectroscopy measurements of high-J O2 A-band magnetic dipole line parameters. Our goals were to measure intensities and line shape parameters for the primary isotopologue of O2 in the A-band region and to

Optimizing Acoustic Measurements of the Boltzmann Constant

November 22, 2009
Author(s)
Michael R. Moldover
We review the progress in acoustic metrology of gases that has occurred since the 1988 measurement of the universal gas constant R using a spherical acoustic resonator. The advances in understanding resonators and in calculating the thermophysical

Chemical Science and Technology Laboratory (CSTL) 2009 Annual Report

November 17, 2009
Author(s)
Willie E. May, Richard R. Cavanagh, Dianne L. Poster, Michael D. Amos
CSTL is entrusted with building, sustaining, and maximizing the chemical measurement system that is criticial to chemical technological innovation, economic competitiveness and new job growth for the benefit of the Nation.

Fabrication with Flip-Chip Lamination

November 15, 2009
Author(s)
Mariona Coll Bau, Curt A. Richter, Christina Hacker
Fabrication with Flip-Chip Lamination , Mariona Coll, DR Hines, CA Richter, CA Hacker, Nanotechnology colloquium, Wake Forest University, 11-09.

Fabrication with Flip-Chip Lamination

October 15, 2009
Author(s)
Mariona Coll Bau, Curt A. Richter, Christina Hacker
Fabrication with Flip-Chip Lamination , Mariona Coll, DR Hines, CA Richter, CA Hacker, MRSEC surface physics colloquium, University of Maryland, College Park, 10-09.

October 2009 SRM Spotlight

October 14, 2009
Author(s)
Regina R. Montgomery
The SRM Spotlight is a newsletter published by the Measurement Services Division for users of NIST standard reference materials. The Spotlight announces new reference materials and provides information about their use. In addition, this newsletter contains

Effect of RP-1 Compositional Variability on Thermophysical Properties

October 6, 2009
Author(s)
Marcia L. Huber, Eric W. Lemmon, Thomas J. Bruno
We compare experimental and predicted thermophysical properties of two samples of rocket propellant RP-1 obtained from different batches of RP-1 that exhibit compositional variations. One sample is atypical, due to a high olefin content. The effect of the

A Novel Method to Covalently Functionalize Carbon Nanotubes with Isocyanates

September 30, 2009
Author(s)
Tinh Nguyen, Aline Granier, Kristen L. Steffens, Hajin Lee, Naomi Eidelman, Jonathan W. Martin
We have developed a novel method to covalently functionalize carbon nanotubes (CNTs) that carry free isocyanate (N=C=O) groups. NCO-functionalized CNTs (NCO-fCNTs) are very desirable, because the NCO group is highly reactive with hydrogen-active groups
Displaying 726 - 750 of 1900
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