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Journals

An Asymptotic Expression for the Critical-Region Bird's Beak Isotherm and Adjacent Isotherms on the Vapor-Liquid Phase Diagram of a Simple Binary Mixture

July 1, 2001

Author(s)

James C. Rainwater

For a binary mixture of a dilute nonvolatile solute in a volatile solvent, an asymptotic expression is derived for isothermal dew-bubble curves in the region...

Integrating-Sphere System and Method for Absolute Measurement of Transmittance, Reflectance and Absorptance of Specular Samples

July 1, 2001

Author(s)

Leonard M. Hanssen

An integrating sphere system has been designed and constructed for multiple optical property measurement in the infrared spectral range. In particular, for...

Surface state trapping models for SnO₂-based microhotplate sensors

July 1, 2001

Author(s)

J. Ding, T. J. McAvoy, Richard E. Cavicchi, Stephen Semancik

Mass Flow Research and Standards: NIST Workshop Results

July 1, 2001

Author(s)

Robert F. Berg, David S. Green, G E. Mattingly

A recent workshop at the National Institute of Standards and Technology (NIST) identified research and standards that will benefit users and manufacturers of...

Controlling Electrophoretic Trapping of Circular DNA by Addition of Starch Preparations to Agarose Gels

July 1, 2001

Author(s)

Kenneth D. Cole, C M. Tellez-Rodriguez, R Nguyen

A State of the Art Report on the Durability Aspects of Fiber-Reinforced Polymer (FRP) Composites

July 1, 2001

Author(s)

Joannie W. Chin, V M. Karbhari, D R. Reynaud

Although fiber-reinforced polymer (FRP) composites are increasingly being used for the renewal of civil infrastructure, there are still some major questions...

Stress Test: A Reliability-Based Method for Predicting the Service Life of Sealants

July 1, 2001

Author(s)

Christopher C. White

The standard test method for evaluaating sealant performance is the ASTM C719; a threshold or torture test bsed upon the pioneering work of NIST researcher...

Molecular Dynamics Study of Thin Water-Acetonitrile Films

July 1, 2001

Author(s)

Raymond D. Mountain

Molecular dynamics simulations are used to generate the composition and orientation profiles for thin, water-acetontitrile films. The liquid-vapor interfaces of...

Polymer Chain Relaxation: Surface Outpaces Bulk

July 1, 2001

Author(s)

William E. Wallace, Daniel A. Fischer, K Efimenko, Wen-Li Wu, Jan Genzer

In this work we show how carbon near-edge X-ray absorption fine structure (NEXAFS) can be applied to detect both surface and bulk segmental relaxation in...

Isotopic Ratio Measurements by Time-of-Flight Secondary Ion Mass Spectrometry

July 1, 2001

Author(s)

Albert J. Fahey, S R. Messenger

Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS) is often considered synonymous with SIMS in the static limit where the ion fluence on the sample...

Approximating the Number of Monomer-Dimer Coverings in Periodic Lattices

July 1, 2001

Author(s)

Isabel M. Beichl, Dianne M. O'Leary, F Sullivan

Our starting point is an algorithm of Kenyon, Randall, and Sinclair, which built upon the ideas of Jerrum and Sinclair, giving an approximation to crucial...

Phase Transitions and Microwave Dielectric Properties in the Perovskite-Like Ca(Al_0.5Nb_0.5)O₃-CaTiO₃ System

July 1, 2001

Author(s)

Igor Levin, Julia Y. Chan, James E. Maslar, Terrell A. Vanderah, S M. Bell

Phase transitions and microwave dielectric properties in (1-x)Ca(Al0.5Nb0.5)O3 xCaTiO3 system were analyzed using X-ray and neutron powder diffraction...

Constrained Sintering of Glass, Glass-Ceramic and Ceramic Coatings on Metal Substrates

July 1, 2001

Author(s)

J N. Calata, G Q. Lu, Tze J. Chuang

Many applications new use different materials that are fabricated into structures to obtain the desired combination of properties or to suit particular needs...

Network Formation and Compositional Drift During Photo-Initiated Copolymerization of Dimethacrylate Monomers

July 1, 2001

Author(s)

J W. Stansbury, Sabine H. Dickens

Dimethacrylate monomers that differ in structure and viscosity are typically used to generate photocured cross-linked polymers for dental adhesive and...

Strain Percolation: Physical Considerations

July 1, 2001

Author(s)

Lyle E. Levine, R M. Thomson, Y Shim

In previous papers, we have introduced a percolation model for the transport of strain through a deforming metal. In this paper, we review the results from that...

X-Ray Scattering and Imaging From Plastically Deformed Metals

July 1, 2001

Author(s)

Gabrielle G. Long, Lyle E. Levine, Richard J. Fields

New ultra-small-angle X-ray scattering (USAXS) facilities at 3rd generation synchrotron sources enjoy an additional 1 to 3 decades of X-ray brilliance over 2nd...

Evaluation of the Elevated Temperature Creep Strength of Three Lead-Free Solder Alloys in Soldered Joints

July 1, 2001

Author(s)

D A. Shepherd, Robert C. Hagwood, Richard J. Fields

Amendments to the Safe Drinking Water Act mandated that soldered joints used in potable water systems be free of lead. In addition to lead contents, allowable...

Calculation of Phase Equilibria in Candidate Solder Alloys

July 1, 2001

Author(s)

Ursula R. Kattner, C A. Handwerker

New solder alloys are being developed for electronic assemblies as replacements for traditional Pb-containing solder materials as a result of international...

Spin Spring Behavior in Exchange Coupled Soft and High-Coercivity Hard Ferromagnets

July 1, 2001

Author(s)

Robert D. Shull, Alexander J. Shapiro, V S. Gornakov, Valerian I. Nikitenko, J.S. Jiang, H Kaper, G Leaf, S D. Bader

The magnetization reversal processes in an epitaxial Fe/Sm 2Co 7 structure were investigated using the magneto-optical indicator film technique. The dependence...

From Stars to Spheres: A SAXS Analysis of Dilute Dendrimer Solutions

July 1, 2001

Author(s)

T J. Prosa, Barry J. Bauer, Eric J. Amis

The progression of intramolecular organizations within a series of dilute poly(amino amine) (PAMAM) dendrimer/methanol solutions is examined by use of small...

Elastic Constants of Mullite Containing Alumina Platelets

July 1, 2001

Author(s)

H M. Ledbetter, Sudook A. Kim, Martin Dunn, Z Xu, S Crudele, W Kriven

Using dynamic methods, we measured the elastic constants of a composite comprising alumina platelets (0.2 volume fraction) in a 3:2-mullite matrix. Instead of...

Luminous Intensity Calibrations and Colorimetry of LEDs at NIST

July 1, 2001

Author(s)

Carl C. Miller, Yoshihiro Ohno

Light Emitting Diodes (LEDs) are unique light sources differing greatly from traditional lamps in terms of physical size, flux level, spectrum and spatial...

On Boundary Condition-Induced States in Low-Dimensional Semiconductor Structures

July 1, 2001

Author(s)

W Jaskolski, R -. Oszwaldowski, Garnett W. Bryant

We examine different solutions of multi-band k.p Hamiltonians. We refer mainly to the intrinsic surface states, with energies in the forbidden energy gap, that...

Ultrastable Laser Array at 633 nm for Real-Time Dimensional Metrology

July 1, 2001

Author(s)

John R. Lawall, J Pedulla, Y LeCoq

We describe a laser system for very high-accuracy dimensional metrology. A sealed-cavity helium-neon laser is offset-locked to an iodine-stabilized laser in...

The Infrared Spectra of OCS⁺ and OCS^- Trapped in Solid Neon

July 1, 2001

Author(s)

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

When a Ne:OCS sample was codeposited at approximately 5 K with a beam of neon atoms that were excited in a microwave discharge, the infrared spectrum of the...

Some Physics and Chemistry of Hot-Wire Deposition

July 1, 2001

Author(s)

Alan Gallagher

Although hot-wire chemical vapor deposition (HWCVD) involves far fewer species than plasma enhanced CVD, I have used some physics and chemistry in the title...

Improved Characterization of Elastic Scattering Near a Feshbach Resonance in ⁸⁵Rb

July 1, 2001

Author(s)

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

We report extensions and corrections to the measurement of the Feshbach resonance in 85Rb cold atom collisions reported earlier (J.L. Roberts et al., Phys. Rev...

Accurate Pattern Registration for Integrated Circuit Tomography

July 1, 2001

Author(s)

Zachary H. Levine, S Grantham, S Neogi, S P. Frigo, I McNulty, C C. Retsch, Y Wang, Thomas B. Lucatorto

As part of an effort to develop high resolution microtomography for engineered structures, a two-level copper integrated circuit interconnect was imaged using 1...

Some Case Studies of Skewed (and Other Ab-Normal) Data Distributions Arising in Low-Level Environmental Research

July 1, 2001

Author(s)

Lloyd A. Currie

Three general classes of skewed data distributions have been encountered in our research on background radiation, chemical and radiochemical blanks, and low...

Probing nuclear quadrupole interactions in the rotationally resolved S1]S0 electronic spectrum of 2-chloronaphthalene

July 1, 2001

Author(s)

David F. Plusquellic, F -. Jahanmir

Rotationally resolved S 1 S o fluorescence excitation spectra of 2-chloronaphthalene (2CIN) are measured using a newly constructed UV laser/molecular beam...

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