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Search Publications by: Fan Zhang (Fed)

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Displaying 126 - 139 of 139

Structure and Dynamics Studies of Concentrated Micrometer-Sized Colloidal Suspensions

January 7, 2013
Author(s)
Fan Zhang, Andrew J. Allen, Lyle E. Levine, Jan Ilavsky, Gabrielle G. Long
We present an experimental study of the structural and dynamical properties of concentrated suspensions of a series of different sized polystyrene microspheres dispersed in glycerol for volume fraction concentrations between 10 % and 20 %. The static

High-energy Ultra-Small Angle X-ray Scattering Instrument at the Advanced Photon Source

December 1, 2012
Author(s)
Andrew J. Allen, Lyle E. Levine, Fan Zhang, Gabrielle G. Long, Jan Ilavsky, Pete R. Jemian
This paper reports recent tests performed on the Bonse-Hart-type ultra-small angle X-ray scattering (USAXS) instrument at the Advanced Photon Source with higher-order reflection optics — Si (440) instead of Si (220) — and with X-ray energies greater than

Ultra-Small-Angle X-ray Scattering-X-ray Photon Correlation Spectroscopy: A New Measurement Technique for in-situ Studies of Equilibrium and Nonequilibrium Dynamics

May 1, 2012
Author(s)
Fan Zhang, Andrew J. Allen, Lyle E. Levine, Jan Ilavsky, Gabrielle G. Long
Ultra-small-angle X-ray scattering—X-ray photon correlation spectroscopy (USAXS-XPCS) is a novel measurement technique for the study of equilibrium and slow nonequilibrium dynamics in disordered materials. This technique fills an existing gap between the

Ultra-small-Angle X-ray Scattering - X-ray Photon-Correlation Spectroscopy Studies of Incipient Structural Changes in Amorphous Calcium Phosphate Based Dental Composites

February 28, 2012
Author(s)
Fan Zhang, Andrew Allen, Lyle E. Levine, Laura Espinal, Joseph M. Antonucci, Drago Skrtic, Justin N. O'Donnell, Jan Ilavsky
The local structural changes in amorphous calcium phosphate (ACP) based dental composites were studied upon heating using both static, bulk measurement techniques and recently developed ultra-small angle X-ray scattering - X-ray photon correlation

Development of Ultrasmall-Angle X-ray Scattering - X-ray Photon Correlation Spectroscopy

February 1, 2011
Author(s)
Fan Zhang, Andrew J. Allen, Lyle E. Levine, Jan Ilavsky, Gabrielle G. Long, Anthony M. Santana
In this paper, we present the development of ultrasmall-angle X-ray scattering - X-ray photon correlation spectroscopy (USAXS-XPCS). This technique takes advantage of Bonse-Hart crystal optics and is capable of probing the slow equilibrium and

Frequency-Dependent Charge-Pumping: The Depth Question Revisited

May 1, 2010
Author(s)
Fan Zhang, Kin P. Cheung, Jason Campbell, John S. Suehle
A popular defect depth-profiling technique, frequency-dependent charge-pumping is carefully re-examined. Without complicated math of modeling, the physics behind the technique is examined clearly. It is shown that there is no unique relationship between
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