Monday, August 20, 2012

A simple two-dimensional model system to study electrostatic-self-assembly

Rebecca Cademartiri, Claudiu A. Stan, Vivian M. Tran, Evan Wu, Liam Friar, Daryl Vulis, Logan W. Clark,
Simon Tricard and George M. Whiteside

Millimeter sized polymer objects were enclosed into a container and agitated, which caused the polymers to charge through contact electrification and self-assemble reproducibly. This self-assembly depended on a number of variable including material, size, and shape of container (eg. aluminum, Nylon, teflon, PMMA) and polymers (eg. Nylon, teflon, polyamideimide, HDPE, PP, PS); type, amplitude, and frequency of agitation; and number of spheres of each type of polymer. The group classified three types of structures as crystals, chain, and rosettes, and self-assembly also seemed to play a role in electrical charge of the objects.

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