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NIST Authors in Bold

Displaying 12026 - 12050 of 73927

NIST Spectroscopic Measurement Standards

May 1, 2018
Author(s)
Paul C. DeRose, Kenneth D. Cole, Aaron Urbas, Steven J. Choquette, Evelyn Solis, Erica V. Stein, John E. Schiel, Brian Lang, Hua-Jun He
Ultraviolet (UV) absorbance measurements provide a rapid and reliable method to determine protein concentrations. The National Institute of Standards and Technology (NIST) has developed Standard Reference Material (SRM) 2082as a pathlength standard for UV

Oxidatively-induced DNA damage and base excision repair in euthymic patients with bipolar disorder

May 1, 2018
Author(s)
Deniz Ceylan, Gamze Tuna, Guldal Kirkali, Zeliha Tunca, Gunes Can, Hidayet E. Arat, Melis Kant, Miral M. Dizdar, Aysegul Ozerdem
Oxidatively-induced DNA damage has previously been associated with bipolar disorder. More recently, impairments in DNA repair mechanisms have also been reported. We aimed to investigate oxidatively-induced DNA lesions and expression of DNA glycosylases

Raman spectroscopy for dopant optimization in GaN nanowire light-emitting diodes

May 1, 2018
Author(s)
Kristine A. Bertness, Bryan T. Spann, Matthew D. Brubaker, Todd E. Harvey, Paul T. Blanchard
We apply Raman spectroscopy to optimize both n-type and p-type doping in GaN nanowire light- emitting diodes (LEDs) grown with selective epitaxy on Si(111) with molecular beam epitaxy. N-type doping with Si is characterized using the peak shift in the LO

Spectral tuning of localized surface phonon-polariton modes in selective area epitaxy GaN nanowire arrays

May 1, 2018
Author(s)
Bryan T. Spann, J. Ryan Nolen, Matthew D. Brubaker, Thomas G. Folland, Chase T. Ellis, Joseph G. Tischler, Todd E. Harvey, Joshua D. Caldwell, Kristine A. Bertness
Polar semiconductor materials, such as GaN, InP, SiC et al., offer a basis to manufacture innovative long-wavelength photonic devices.1 Such semiconductors can support propagating and localized surface phonon-polariton (SPhP) resonances that provide highly

The Ninth Industrial Fluid Properties Simulation Challenge

May 1, 2018
Author(s)
Jonathan D. Moore, Raymond D. Mountain, Richard B. Ross, Vincent K. Shen, Daniel Siderius, Kenneth D. Smith
The Ninth Industrial Fluid Properties Simulation Challenge aimed to test the ability of molecular modeling approaches to predict water/oil interfacial tension (IFT) at conditions of high temperature and pressure. In particular, the challenge featured water

Enhanced superconducting transition temperature in electroplated rhenium

April 30, 2018
Author(s)
David P. Pappas, Don David, Mustafa Bal, Ilke Arslan, Paul T. Blanchard, Ronald B. Goldfarb, Dustin A. Hite, Hsiang S. Ku, Russell E. Lake, Junling Long, Alexana Roshko, Lee D. Pappas, Britton L. Plourde, Jianguo Wen, Xian Wu, Corey Rae H. McRae
We show that electroplated Re films in multilayers with noble metals such as Cu, Au, and Pd have an enhanced superconducting critical temperature relative to previous methods of preparing Re. The dc resistance and magnetic susceptibility indicate a critical

Quasi-Deterministic-Channel-Propagation Model for a Data Center at 60 GHz

April 30, 2018
Author(s)
Camillo Gentile, Peter B. Papazian, Roy Sun, Jelena Senic, Jian Wang
We describe a measurement campaign conducted in a data center, a unique environment in which transceivers are positioned above the server racks. A total of 80 channel acquisitions, including small-scale measurements, were recorded using our 3D double

Thermally driven anomalous Hall effect transitions in FeRh

April 30, 2018
Author(s)
Adrian Popescu, Pablo Rodrigues-Lopez, Paul M. Haney, Lilia M. Woods
Materials exhibiting controllable magnetic phase transitions are currently in demand for many spintronics applications. Here we investigate from first principles the electronic structure and intrinsic anomalous Hall, spin Hall and anomalous Nernst response

Magnetic Ordering in a Frustrated Bow-Tie Lattice

April 28, 2018
Author(s)
Laura J. Vera Stimpson, Efrain E. Rodriquez, Craig Brown, Gavin B. G. Stenning, Marek Jura, Donna C. Arnold
We report a systematic elastic and inelastic powder neutron diffraction study of the geometrically frustrated material, Ca 2Mn 3O 8. Ca 2Mn 3O 8 exhibits a "bow-tie" like connectivity of Mn 4+ with Ca 2+ occupying octahedral sites between MnO 6 layers
Displaying 12026 - 12050 of 73927
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