U.S. flag

An official website of the United States government

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.

Search Publications

NIST Authors in Bold

Displaying 43451 - 43475 of 143727

Nanoscale structure measurements for polymer-fullerene photovoltaics

February 3, 2012
Author(s)
Dean M. DeLongchamp, Regis J. Kline, Andrew A. Herzing
This review covers methods to measure key aspects of nanoscale structure in organic photovoltaic devices based on polymer-fullerene bulk heterojunctions. The importance of nanoscale structure to the power conversion efficiency and stability of these

Antibacterial amorphous calcium phosphate nanocomposite with quaternary ammonium salt and silver nanoparticles

February 2, 2012
Author(s)
Nancy Lin, Lei Cheng, Michael D. Weir, Hockin H. Xu, Joseph M. Antonucci, Alison M. Kraigsley, Sheng Lin-Gibson, Xuedong Zhou
Objectives. Calcium and phosphate ion-releasing resin composites are promising for remineralization; however, so far there has been no report on imparting a potent antibacterial capability to these composites. The objectives of this study were to

Control of Molecular Mass Distributions in Enzymatic Lactone Polymerizations

February 2, 2012
Author(s)
Santanu S. Kundu, Peter M. Johnson, Kathryn L. Beers
Using a model developed for the enzyme catalyzed polymerization and degradation of poly(caprolactone), we illustrate methods and the kinetic mechanisms necessary to improve molecular mass distributions by manipulating equilibrium reactions in the kinetic

Double-Focusing Thermal Triple-Axis Spectrometer at the NCNR

February 2, 2012
Author(s)
Y. Chen, Sung Chang, Yang Zhao, Songxue Chi, William D. Ratcliff, B. G. Ueland, Ross Erwin
The new thermal triple-axis spectrometer at the NIST Center for Neutron Research (NCNR) is located at the BT-7 beam port. The 165 mm diameter reactor beam is equipped with a selection of Söller collimators, beam-limiters, and pyrolytic graphite (PG) filter

NIST Ionization Chamber "A" Sample-Height Corrections

February 2, 2012
Author(s)
Ryan P. Fitzgerald
For over 30 years scientists in the NIST radioactivity group have been using their ionization chamber “A” to make measurements of radioactivity and radioactive half-lives. We now have evidence that some of those reported measurements were incorrect due to

Standardization of Broadband UV Measurements for 365 nm LED Sources

February 2, 2012
Author(s)
George P. Eppeldauer
Broadband UV measurements are analyzed when UV-A irradiance meters measure optical radiation from 365-nm sources. The CIE standardized rectangular-shape UV-A function can be realized only with large spectral mismatch errors. The spectral power-distribution

A statistical study of de-embedding applied to eye diagram analysis

February 1, 2012
Author(s)
Paul D. Hale, Jeffrey A. Jargon, Chih-Ming Wang, Brett Grossman, Matthew Claudius, Jose Torres, Andrew M. Dienstfrey, Dylan F. Williams
We describe a stable method for calibrating digital waveforms and eye diagrams using the measurement system response function and its regularized inverse. The function describing the system response includes the response of the oscilloscope and any

Absolute measurements of x-ray backlighter sources at energies above 10 keVa)

February 1, 2012
Author(s)
Lawrence T. Hudson, B.R. Maddox, H.S. Parks, B A. Remington, C. Chen, S Chen, S. T. Prisbrey, A. Comley, C A. Back, C. Szabo, John F. Seely, Uri Feldman, Stephen M. Seltzer, M. J. Haugh, Z. Ali
Line emission and broadband x-ray sources with x-ray energies above 10 keV have been investigated using a range of calibrated x-ray detectors for use as x-ray backlighters in high energy density (HED) experiments. The conversion efficiency of short- and
Displaying 43451 - 43475 of 143727
Was this page helpful?