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Search Publications by: Cedric Gagnon (Assoc)

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Displaying 1 - 16 of 16

The Very Small-Angle Neutron Scattering Instrument at the National Institute of Standards and Technology

February 27, 2022
Author(s)
John Barker, James Moyer, Steven Kline, G. Jensen, Jeremy Cook, Cedric V. Gagnon, Elizabeth Kelley, Jean Philippe Chabot, Nicholas C. Maliszewskyj, Chirag B. Parikh, Wangchun Chen, C. Glinka
A description and the performance of the Very Small-Angle Neutron Scattering (VSANS) Diffractometer at the National Institute of Standards and Technology are presented. The measurement range of the instrument extends over three decades of momentum transfer

Effects of Ionic Strength, Salt, and pH on Aggregation of Boehmite Nanocrystals: Tumbler Small-Angle Neutron and X-ray Scattering and Imaging Analysis

December 26, 2018
Author(s)
L. M. Anovitz, X. Zhang, J. Soltis, E. Nakouzi, A. J. Krzysko, J. Chun, G. K. Schenter, T. R. Graham, K. M. Rosso, J. J. De Yoreo, A. G. Stack, Markus Bleuel, Cedric V. Gagnon, David F. Mildner, J. Ilavsky, I. Kuzmenko
The U.S. government currently spends significant resources annually managing the legacies of the Cold War, including 300 million liters of highly radioactive wastes stored in hundreds of tanks at the Hanford Site (WA) and the Savannah River Site (SC). The

Spin-Analyzed SANS for Soft Matter Applications

June 20, 2017
Author(s)
WangChun Chen, John Barker, Ronald L. Jones, Kathryn Krycka, Shannon Watson, Cedric Victor Lucien Gagnon, T. Perevozchivoka, Paul Butler, Thomas R. Gentile
The small angle neutron scattering (SANS) of nearly Q-independent nuclear spin-incoherent scattering from hydrogen present in most soft matter and biology samples may raise an issue in structure determination in certain soft matter applications. This is

Nanoscale Constraints on Porosity Generation and Fluid Flow during Serpentinization

February 1, 2016
Author(s)
Benjamin Tutolo, David F. Mildner, Cedric V. Gagnon, Martin O. Saar, Jr. Seyfried
Field samples of olivine-rich rocks are nearly always serpentinized¿often to completion¿but, paradoxically, their intrinsic porosity and permeability are diminishingly low. Serpentinization reactions occur through a coupled process of fluid infiltration

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

Three-dimensional Scanning Optical Tweezers

December 5, 2005
Author(s)
Thomas W. LeBrun, T W. Hwang, I Y. Park, Jun-Feng Song, Yong-Gu Lee, Nicholas G. Dagalakis, Cedric V. Gagnon, Arvind K. Balijepalli
There are several new tools for manipulating microscopic objects. Among them, optical tweezers (OT) has two distinguishing advantages. Firstly, OT can easily release an object without the need of a complicated detaching scheme. Secondly, it is anticipated

A Modular System Architecture for Agile Assembly of Nanocomponents using Optical Tweezers

September 10, 2005
Author(s)
Arvind K. Balijepalli, Thomas W. LeBrun, Cedric V. Gagnon, Yong-Gu Lee, Nicholas G. Dagalakis
In order to realize the flexibility optical trapping offers as a nanoassembly tool, we need to develop natural and intuitiveinterfaces to assemble large quantities of nanocomponents quickly and cheaply. We propose a system to create such aninterface that

Development of Multiple Beam Optical Tweezers

June 1, 2005
Author(s)
Dongjin Lee, Thomas W. LeBrun, Arvind Balijepalli, Jason J. Gorman, Cedric V. Gagnon, Daehie Hong, Esther H. Chang
This paper presents the design of a multiple beam optical tweezers instrument used for manipulating micro/nano-sized components. The basic equations used in designing the optical tweezers are derived and the stable and time-sharing multiple beam optical