Bulletin of the American Physical Society
2018 Annual Meeting of the Far West Section
Volume 63, Number 17
Thursday–Saturday, October 18–20, 2018; Cal State Fullerton, Fullerton, California
Session B01: Experimental Condensed Matter Physics and Material Science
2:00 PM–3:48 PM,
Friday, October 19, 2018
Titan Student Union
Room: Ontiveros A-B
Chair: Roopali Kukreja, University of California, Davis
Abstract ID: BAPS.2018.FWS.B01.1
Abstract: B01.00001 : Measurement of hard-sphere like dynamics in concentrated alpha-crystallin suspensions using X-ray Photon Correlation Spectroscopy*
2:00 PM–2:12 PM
Presenter:
Vidanage Nuwan C Karunaratne
(Northern Illinois Univ, Orange Coast College)
Author:
Vidanage Nuwan C Karunaratne
(Northern Illinois Univ, Orange Coast College)
Collaboration:
Preeti Vodnala, Laurence Lurio, George Thurston, Elizabeth Gaillard, Suresh Narayanan, Alec Sandy
The dynamics of concentrated suspensions of the ocular protein, alpha crystallin have been measured using X-ray Photon Correlation Spectroscopy (XPCS). Measurements were made at wavevectors corresponding to the first peak in the hard-sphere structure factor. The dynamics were measured at volume fractions close to the critical volume fraction for the glass transition, where the intermediate scattering function, f (q, τ ) could be well fit using a double exponential decay. The measured relaxation times were in reasonable agreement with published molecular dynamics simulations for the relaxation times of hard-sphere colloids.
Overall our results lend support to the hard sphere colloid model as a good description of concentrated suspensions of alpha crystallin.
*NSF Award ( NSF DMR 0706369 ), NIH Award ( R15EY018249 )
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.FWS.B01.1
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