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NIST Authors in Bold

Displaying 1526 - 1550 of 1856

Development of a Combinatorial Rheometer for Polymer Formulations

February 1, 2004
Author(s)
H J. Walls, Robert F. Berg, Kathryn L. Beers, Eric J. Amis
Finding the best formulation for a new application, or fine-tuning an existing formulation to meet various customer needs, requires extensive sample preparation and testing. Our goal is to make this exploration more efficient for the property of viscosity

High Throughput Measurement of the Elastic Modulus of Polymer Thin Films

February 1, 2004
Author(s)
Christopher M. Stafford, A Chiche, D Julthongpiput, Michael J. Fasolka
Combinatorial and High Throughput (C&HT) methods combine clever experiment design, instrument automation, and computing tools to form a new paradigm for scientific research. Given this premise, the C&HT concept is being adapted to study problems in

High-Frequency Dielectric Relaxation in Trehalose-Glycerol Mixtures

February 1, 2004
Author(s)
O Anopchenko, Jan Obrzut, Bert W. Rust
Broadband dielectric measurements were performed on a series of trehalose-glycerol mixtures in a wide concentration range of glycerol and temperature swept from 220 K to 350 K. Relaxation spectra were obtained directly from the measured dielectric spectra

High-Throughput Adhesion Testing of Combinatorial Libraries With Multi-Lens Arrays

February 1, 2004
Author(s)
Aaron M. Forster, Wenhua Zhang, Christopher Stafford
The NIST Combinatorial Methods Center (NCMC) has adapted the Johnson, Kendall, and Roberts (JKR) test to develop a high-throughput adhesion measurement platform. Traditionally, the JKR test utilizes a single hemispherical lens compressed against (loading)

Investigations of Electrospray Sample Deposition for Polymer MALDI Mass Spectrometry

February 1, 2004
Author(s)
S D. Hanton, I Z. Hyder, J R. Stets, K G. Owens, William R. Blair, Charles M. Guttman, Anthony A. Giuseppetti
In the interest of more thoroughly understanding the relationship between sample preparation technique and spectra quality produced in Matrix-Assisted Laser Desorption/Ionization (MALDI) mass spectrometry, we have investigated details of the Electrospray

Quantitative Response Measurement of Cell Substrate Interactions via RT-PCR

February 1, 2004
Author(s)
Matthew Becker, L A. Bailey, Karen L. Wooley, J Kohn, Eric J. Amis, N Washburn
High-throughput metrologies for the rapid and systematic evaluation of synthetic materials, which would elucidate a candidate s potential biocompatibility, are needed. New synthetic methodologies have enabled a remarkable advance in the rational design of

Reaching Beyond Discovery

February 1, 2004
Author(s)
Eric J. Amis
Whatever you are trying to make, the choice of materials is often bewildering. Novel combinatorial approaches allow you to reduce the time and costs necessary to optimize results, while stimulating the quest for deeper fundamental knowledge.

Scattering Methods Applied to High Throughput Materials Science

February 1, 2004
Author(s)
A I. Norman, J Cabral, D L. Ho, Eric J. Amis, Alamgir Karim
Scattering methods have been employed to study the aqueous phase behavior of two low molecular weight diblock copolymers, EO(6)BO(11) and EO(18)BO(9), where EO denotes an ethyleneoxide unit and BO denotes a butyleneoxide unit. Depending on the lengths of

Significant Parameters in the Optimization of MALDI-TOF-MS

February 1, 2004
Author(s)
S Wetzel, Kathleen M. Flynn, James J. Filliben
One of the most significant issues in any analytical technique is optimization. Optimization and calibration are key factors in quantitation. In matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS), one of the

Elastic Flow Instability in Nanotube Suspensions

January 1, 2004
Author(s)
Sheng Lin-Gibson, Jai A. Pathak, E A. Grulke, Haonan Wang, Erik K. Hobbie
We report an elastic instability associated with flow-induced clustering in non-Brownian colloidal nanotubes. Rheo-optical measurements are compared with recent simulations of mechanical flocculation in sheared fiber suspensions, and we observe an

High Throughput Measurements of Polymer Fluids for Formulations

January 1, 2004
Author(s)
Kathryn Beers, J Cabral, H J. Walls, Eric J. Amis
Rapid prototyping of microfluidic handling devices has gained popularity due to the ability to quickly test and modify new design features several times in one day. At the NIST Combinatorial Methods Center (NCMC), we have modified common microfluidic

International Interlaboratory Comparison of Mixtures of Polystyrenes With Different End Groups Obtained by Matrix Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF-MS): Preliminary Results

January 1, 2004
Author(s)
Charles M. Guttman, S Wetzel, Kathleen M. Flynn, B M. Fanconi, William E. Wallace, David L. VanderHart
NIST has sponsored a MALDI-TOF-MS interlaboratory comparison of mixtures of polymers of the same repeat unit with closely matching molecular masses but with different end groups. This interlaboratory comparison was designed to see how well a group of labs
Displaying 1526 - 1550 of 1856