397554 Optoelectric Assembly and Manipulation of Beads in a Vertical Tower Configuration

Monday, November 17, 2014: 1:45 PM
Marquis Ballroom D (Marriott Marquis Atlanta)
Katherine Clayton1, Avanish Mishra1, Stuart J. Williams2 and Steven T. Wereley3, (1)Purdue University, West Lafayette, IN, (2)Mechanical Engineering, University of Louisville, Louisville, KY, (3)Birck Nanotechnology Center, Purdue University, West Lafayette, IN

A number of optical and optoelectrical techniques have been proposed for the trapping and manipulation of micro- to nanoscale colloidal particles. Rapid Electrokinetic Patterning (REP) is one such technique. It uses laser induced electrothermal flow and particle-electrode interactions to reversibly capture particles in a monolayer. Particle trapping in a monolayer is mainly governed by AC Electroosmosis, electrothermal flow, van der Waals attraction and electrostatic forces. Particles can be translated on the substrate by optically steering the laser or by moving the translation stage. In this work we show that by a careful selection of parameters, particles can be rapidly trapped in a vertical tower configuration instead of a monolayer. Moreover, this vertical tower can be translated and positioned at any desired place on the chip. We intend to discuss underlying physical mechanism and potential applications in biology.

Extended Abstract: File Not Uploaded
See more of this Session: Electrokinetics for Self-Assembly
See more of this Group/Topical: 2014 Annual Meeting of the AES Electrophoresis Society