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Search Publications by: Dan A. Neumann (Fed)

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Displaying 1 - 22 of 22

Probing the Interfacial Structure of Bilayer Plasma Polymer Films via Neutron Reflectometry

May 1, 2016
Author(s)
Yali Li, Andrew Nelson, Christopher D. Easton, David R. Nisbet, John S. Forsythe, Benjamin Muir, Dan A. Neumann
Bilayer plasma polymer (PP) films were examined using a combination of X-ray and neutron reflectometry and X-ray photoelectron spectroscopy to gain an understanding of the interfacial structures that form between the films. Three different PP films were

Experimental Characterization of the Advanced Liquid Hydrogen Cold Neutron Source Spectrum of the NBSR Reactor at the NIST Center for Neutron Research

August 1, 2015
Author(s)
Jeremy C. Cook, John G. Barker, J. Michael Rowe, Robert E. Williams, Cedric V. Gagnon, Richard M. Lindstrom, Richard Michael Ibberson, Dan A. Neumann
The recent expansion of the NIST Center for Neutron Research facility has offered a rare opportunity to perform an accurate measurement of the cold neutron spectrum at the exit of a newly-installed neutron guide. Using a combination of a neutron time-of

Metal-Assisted Hydrogen Storage on Pt-Decorated Single-Walled Carbon Nanohorns

June 23, 2012
Author(s)
Yun Liu, Craig M. Brown, Dan A. Neumann, David B. Geohegan, Alexander A. Puretzky, Christopher M. Rouleau, Hui Hu, David Styers-Barnett, Pavel O. Krasnov, Boris I. Yakobson
Current methods to study the spillover effect in hydrogen storage materials typically must compare the results from a separate reference sample. This makes it difficult to determine with confidence the amount of adsorbed hydrogen only associated with

Neutron Backscattering

May 11, 2011
Author(s)
B. Frick, Dan A. Neumann
We review the status of neutron backscattering spectrometers on reactors and spallation sources including the most recent instrument developments. After setting the stage by looking briefly at the history of backscattering instruments, we review the

Characterization of Fly Ash Reactivity in Hydrating Cement by Neutron Scattering

July 14, 2009
Author(s)
W Bumrongjaroen, Richard A. Livingston, Dan A. Neumann, Andrew J. Allen
A combination of small-angle and inelastic neutron scattering studies are presented to elucidate the different effects of Class F and Class C fly ash additions on microstructure development in hydrating cement (and concrete). Small angle neutron scattering

A reversible structural transition in MIL-53 with large temperature hysteresis

August 12, 2008
Author(s)
Yun Liu, Jae-Hyuk Her, Anne Dailly, A. Ramirez-Cuesta, Dan A. Neumann, Craig Brown
The metal-organic framework, MIL-53, can have a structural transition from an open-pored to a closed-pored structure by adsorbing different guest molecules. The aid of guest molecules is believed to be necessary to initiate this "breathing" effect. Using