Direct visualization of three-dimensional crystallization behavior in microgels
Weitz, David A.
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CitationMuluneh, Melaku, and David A. Weitz. 2012. “Direct Visualization of Three-Dimensional Crystallization Behavior in Microgels.” Physical Review E85 (2): 021405. https://doi.org/10.1103/PhysRevE.85.021405.
AbstractWe use confocal microscopy to study the three-dimensional (3D) structure of colloidal crystals formed by poly(N-isopropylacrylamide)-co-(acrylic acid) microgels of diameter 1.0-1.5 mu m. The confocal images are tracked to locate particle positions in 3D, which are used to compute pair-correlation functions g(r), bond order parameters, and structure factors s(q). We find that the structure remains fcc for a range of charge, size, and concentration of the particles. When the particles are weakly attractive and are at low concentrations, polycrystalline solids result. In addition, owing to the compressibility of the colloids, the crystals display remarkable structural stability when subjected to external stress.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41511276
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