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NIST Authors in Bold

Displaying 29001 - 29025 of 74061

Morphological Changes in Thin Polypropylene Films Induced by 4-Biphenyl Carboxylic Acid

October 16, 2008
Author(s)
Marlon L. Walker, Chad R. Snyder, Naomi Eidelman, E S. Etz, A P. Smith, Alamgir Karim, Eric J. Amis
The crystallization behavior of thin polypropylene films both neat and containing a nucleating agent, 4-biphenyl carboxylic acid, was investigated by optical microscopy, atomic force microscopy, infrared spectroscopy and Raman spectroscopy. High-throughput

Morphological Transitions of Elastic Domain Structures in Constrained Layers

October 16, 2008
Author(s)
Julia Slutsker, Andrei Artemev, Alexander L. Roytburd
The phase transformation in a constrained layer is a subject of this paper. The formation and evolution of polydomain microstructure under external stress in the constrained layer are investigated by phase-field simulation and analytically using

Morphology Study of Polystyrene-Polybutadiene-Polycaprolactone (PS-b-PB-b-PCL), Polybutadiene-Polycaprolactone (PB-b-PCL), and Polystyrene-Polycaprolactone (PS-b-PCL) Semicrystalline Block Copolymers

October 16, 2008
Author(s)
G Kim, C L. Jackson, M Libera, R Stadler, Charles C. Han, F V. Gyldenfeldt, V Balsamo
Distinctive behaviors of PCL(polycaprolactone) in block copolymers are significant for various polymer applications such as low temperature adhesives, biocompatibilizer and pigments. Thus, there has been increasing interest in the morphologies of block

Moving Beyond Crunch-the-Crown Testing Clinical Failure

October 16, 2008
Author(s)
J R. Kelly
Traditional fracture tests of single unit prostheses are inappropriate, since they do not create failure mechanisms seen clinically. Validated tests are needed to elucidate the role(s) metal copings, cement systems, bonding and occlusion play in the

MSEL 2003 Programs and Accomplishments: Materials Reliability

October 16, 2008
Author(s)
James A. St Pierre
The Materials Reliability Division mission is to develop and disseminate measurement methods and standards enhancing the quality and reliability of materials for industry. Our portfolio of research projects has changed again this past year, as we continue

NAA Characterization of the New Bovine Liver SRM

October 16, 2008
Author(s)
Rolf L. Zeisler, W. D. James, Elizabeth A. Mackey, Rabia Oflaz, Robert R. Greenberg
The National Institute of Standards and Technology (NIST) is preparing a freeze-dried powdered bovine liver tissue Standard Reference Material (SRM) to replace SRM1577b Bovine Liver as the stock of this material was exhausted during 2006. Like the original

Nanoscale Mechanisms of Fatigue in Ionic Solids

October 16, 2008
Author(s)
Emily Jarvis, E A. Carter
We employ periodic density functional calculations to explore the effect of cyclic tensile loading on the behavior of alumina in the threshold region of crack formation, i.e., where the crystal must choose between healing a defect through a uniform elastic

Nanoscale Switch Elements From Self-Assembled Monolayers on Silver

October 16, 2008
Author(s)
J M. Beebe, James G. Kushmerick
Au/molecule/Ag junctions are shown to behave as voltage-controlled two-state switches. In the open state, the current-voltage behavior is consistent with a metal-molecule-metal tunnel junction. At a negative bias threshold, silver filaments bridge the gap

Nanotechnology Research of NIST Scientists at JILA

October 16, 2008
Author(s)
S R. Leone
NIST scientists participate in a variety of nanotechnology activities, several of which are summarized here. The drive toward both ever-smaller integrated circuits, new materials, biosensors, and improved control of catalysis all rely on quantitative and

Nature Materials News and Views on T. Haxhimali et al

October 16, 2008
Author(s)
James A. Warren
Simulations of dendritic solidification by T. Haxhimali et al. [1] for a pure material and comparisons with experiments in an A1Zn alloy system have shown that a standard theoretical rule of thumb for predicting solidification growth forms can dramatically

Near-Critical Behavior of Aqueous Systems

October 16, 2008
Author(s)
M A. Anisimov, Jan V. Sengers, Johanna Levelt Sengers
This chapter concentrates on the thermophysical properties of water, steam and aqueous solutions in a large range around the water critical point. The chapter is written for a technically knowledgeable audience without specialized background in fluid

Neutron Irradiation in Activation Analysis: A New Rabbit for the NBSR

October 16, 2008
Author(s)
Richard M. Lindstrom, Rolf L. Zeisler, Elizabeth A. Mackey, P J. Liposky, Rachel S. Popelka-Filcoff, Robert E. Williams
Elementary activation analysis assumes that the reaction rate is proportional to the number of atoms of analyte present in the sample. On close examination, this is not always true, even within a set of samples irradiated together. For accurate analysis

Neutron Reflectivity for Interfacial Materials Characterization

October 16, 2008
Author(s)
Eric K. Lin, D J. Pochan, R Kolb, Wen-Li Wu, Sushil K. Satija
Measurements of the physical properties of materials, such as the coefficient of thermal expansion (CTE), in thin films and at interfaces are very important in microelectronics packaging and interconnection, especially as electronic devices decrease in

New Approaches to Serving Library Users

October 16, 2008
Author(s)
C L. Clark
The NIST Research Library serves over 3,000 Science & Technology customers; provides access to 200,000 items, 1,000 journal subscriptions, 700 databases; performs services using the team approach; hosts NIST Virtual Library (NVL); resides online at http:/

New Critical Compilations of Atomic Transition Probabilities

October 16, 2008
Author(s)
Wolfgang L. Wiese, Jeffrey R. Fuhr, Daniel E. Kelleher, Larissa Podobedova
At the National Institute of Standards and Technology (NIST), we are continuing our critical evaluation and compilation work on atomic transition probabilities. We have recently concentrated our efforts on the spectra of Na, Mg, Al, Si and S for all stages
Displaying 29001 - 29025 of 74061