The directed self-assembly of particles in a non-uniform electric field can be achieved due to the phenomenon of dielectrophoresis resulting in an applied force. The strength of this force depends on the polarizability of both the particles & suspending medium, the particles’ size and shape, and the frequency of the electric field. The Clausius-Mossotti Factor, a frequency-dependent function of both the particle and medium complex dielectric permittivity, determines the direction and magnitude of particle response to applied AC fields and changes with charge carrier density. Surface functionalization can alter the mobility of the charges associated with the particle surface electrical double-layer and presents an opportunity to further tune the dielectrophoretic (DEP) response. Herein we present the characterization of the DEP response of particles tuned by various surface chemistries and demonstrate the importance of surface charge mobility in DEP assembly.<br/>

Tuning the dielectrophoretic assembly of dielectric particles through surface functionalization

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.