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Gels 2016, 2(4), 29; doi:10.3390/gels2040029

Photo-Crosslinkable Colloids: From Fluid Structure and Dynamics of Spheres to Suspensions of Ellipsoids

1
Physics Department and Institute of Nanotechnology & Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel
2
Department of Chemistry and Institute of Nanotechnology & Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel
3
The School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, UK
*
Author to whom correspondence should be addressed.
Academic Editor: Clemens K. Weiss
Received: 13 July 2016 / Revised: 3 November 2016 / Accepted: 7 November 2016 / Published: 16 November 2016
(This article belongs to the Special Issue Colloid Chemistry)
View Full-Text   |   Download PDF [3173 KB, uploaded 16 November 2016]   |  

Abstract

Recently-developed photo-crosslinkable PMMA (polymethylmethacrylate) colloidal spheres are a highly promising system for fundamental studies in colloidal physics and may have a wide range of future technological applications. We synthesize these colloids and characterize their size distribution. Their swelling in a density- and index- matching organic solvent system is demonstrated and we employ dynamic light scattering (DLS), as also the recently-developed confocal differential dynamic microscopy (ConDDM), to characterize the structure and the dynamics of a fluid bulk suspension of such colloids at different particle densities, detecting significant particle charging effects. We stretch these photo-crosslinkable spheres into ellipsoids. The fact that the ellipsoids are cross-linked allows them to be fluorescently stained, permitting a dense suspension of ellipsoids, a simple model of fluid matter, to be imaged by direct confocal microscopy. View Full-Text
Keywords: photo-crosslinkable colloids; dynamic light scattering; differential dynamics microscopy; ellipsoid; PMMA photo-crosslinkable colloids; dynamic light scattering; differential dynamics microscopy; ellipsoid; PMMA
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Cohen, A.P.; Alesker, M.; Schofield, A.B.; Zitoun, D.; Sloutskin, E. Photo-Crosslinkable Colloids: From Fluid Structure and Dynamics of Spheres to Suspensions of Ellipsoids. Gels 2016, 2, 29.

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