An official website of the United States government
Here’s how you know
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.
The ISO Guide to the Expression of Uncertainty in Measurement (GUM) recommends the use of a first- order Taylor series expansion for propagating errors and...
In Secondary Ion Mass Spectrometry measurement systems, the count rate of isotopes may vary in time as a particle is consumed during the analysis. Since only...
The ISO Guide to the Expression of Uncertainty in Measurement (GUM) recommends the use of a first-order Taylor series expansion for propagating errors and...
C. Negrevergne, Rolando Somma, Gerardo Ortiz, Emanuel Knill, R. Laflamme
Recently developed quantum algorithms suggest that in principle, quantum computers (QCs) can solve problems such as simulation of physical systems more...
Since the signing of the Mutual Recognition Arrangement, National Metrology Institutes (NMI) have carried out many key comparisons in a wide range of...
J Connolly, E Alferiev, J N. Clark, Naomi Eidelman, M Sacks, E Palmatory, A Kronsteinter, S DeFelice, J Xu, R Ohri, N Navneet, N Vyavahare, R J. Levy
We investigated a novel polyepoxide crosslinker that was hypothesized to confer both material stabilization and calcification resistance when used to prepare...
K J. Zhang, Carl Simon Jr., N Washburn, Joseph M. Antonucci, Sheng Lin-Gibson
Blends of crosslinked poly(ethylene glycol dimethacrylate) (PEGDMA) with poly (D, L-lactide) (PLA) were prepared by mixing photo-activated PEGDMA (molecular...
Erik K. Hobbie, Barry J. Bauer, J S. Stephens, Matthew Becker, P M. McGuiggan, Steven Hudson, Haonan Wang
Single-walled carbon nanotubes (SWNTs) are dispersed in water via wrapping with short segments of single-stranded DNA (ssDNA). Small-angle neutron scattering...
Thin and ultrathin films of copolymer of 83 mol% vinylidene fluoride and 17 mol% trifluoroethylene were prepared using a spin-coating technique. Atomic force...
We report a combinatorial approach for mapping bulk polymer mixture phase behavior. The technique consists of a parallel cloud point detection scheme using...
Carl Simon Jr., Naomi Eidelman, Scott B. Kennedy, Amit Sehgal, C A. Khatri, N. R. Washburn
)We have combined automated fluorescence microscopy with a combinatorial approach for creating polymer blend gradients to yield a high-throughput method for...
Molecular self-organization is central to the formation of numerous biological structures and the emulation of this process through the creation of synthetic...
Justin Stambaugh, K VanWorkum, Jack F. Douglas, Wolfgang Losert
We investigate the self-organization of dipolar spheres into polymer chains as a fundamental model of self-assembly of particles having anisotropic interactions...
D J. Fry, B Langhorst, H W. Kim, E A. Grulke, Haonan Wang, Erik K. Hobbie
We measure the anisotropy of sheared carbon nanotube suspensions for a range of concentration, aspect ratio, and strain rate using a variety of methods. Our...
We show that radio-frequency spectroscopy on weakly-bound molecules is a powerful and sensitive tool to probe molecular energy structure as well as atomic...
D Budker, Leo W. Hollberg, Derek F. Kimball, John Kitching, S Pustelny, V V. Yashchuk
Using laser optical pumping, widths and frequency shifts are determined for microwave transitions between ground-state hyperfine components of 8s}Rb and d87}Rb...