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Proceedings Paper

Tuning parameters of metal ion implantation within a microfluidic channel
Author(s): Jae-Woo Choi; Samuel Rosset; Muhamed Niklaus; James R. Adleman; Herbert Shea; Demetri Psaltis
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Paper Abstract

Applying electrical fields is a simple and versatile method to manipulate and reconfigure optofluidic devices. Several methods to apply electric fields using electrodes on polymers or in the context of lab-on-a-chip devices exist. In this paper, we utilize an ion-implanted process to pattern electrodes within a fluidic channel made of polydimethylsiloxane (PDMS). Electrode structuring within the channel is achieved by ion implantation at a 40° angle with a metal shadow mask. In previous work using the ion-implantation process, we demonstrated two possible applications in the context of lab-on-a-chip applications. Asymmetric particles were aligned through electro-orientation. Colloidal focusing and concentration was possible with negative dielectrophoresis. In this paper, we discuss the different electrode structures that are possible by changing the channel dimensions. A second parameter of ion implantation dosage prevents the shorting of electrodes on the side wall or top wall of the fluidic channel to the bottom. This allows for floating electrodes on the side wall or top wall. These type of electrodes help prevent electrolysis as the liquid is not in direct contact with the voltage source. Possible applications of the different electrode structures that are possible are discussed.

Paper Details

Date Published: 17 February 2010
PDF: 7 pages
Proc. SPIE 7593, Microfluidics, BioMEMS, and Medical Microsystems VIII, 75930D (17 February 2010); doi: 10.1117/12.842025
Show Author Affiliations
Jae-Woo Choi, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
California Institute of Technology (United States)
Samuel Rosset, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Muhamed Niklaus, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
James R. Adleman, California Institute of Technology (United States)
Herbert Shea, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Demetri Psaltis, Ecole Polytechnique Fédérale de Lausanne (Switzerland)


Published in SPIE Proceedings Vol. 7593:
Microfluidics, BioMEMS, and Medical Microsystems VIII
Holger Becker; Wanjun Wang, Editor(s)

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