Issue 2, 2009

Rapid and selective concentration of microparticles in an optoelectrofluidic platform

Abstract

We demonstrate rapid manipulation and selective concentration of microparticles using AC electrokinetics such as dielectrophoresis (DEP) and AC electro-osmosis (ACEO) in an optoelectrofluidic platform based on a liquid crystal display (LCD). When 10 V bias at 10 kHz was applied to the optoelectrofluidic device, only the 1 µm-diameter polystyrene particles were concentrated into the projected LCD image patterns and closely packed, forming the crystalline structure by ACEO flow, while the 6 µm-diameter particles were repelled by negative DEP forces. We have characterized this frequency-dependency of the optoelectrofluidic particle behavior according to the particle diameter. On the basis of these results, we can rapidly concentrate the 1 µm-diameter particles and separate them from the 6 µm particles, by applying an AC signal of 10 kHz frequency. This novel technique can be applied to rapidly concentrate, separate and pattern micro-/nanoparticles in many biological and chemical applications.

Graphical abstract: Rapid and selective concentration of microparticles in an optoelectrofluidic platform

Supplementary files

Article information

Article type
Paper
Submitted
09 Jul 2008
Accepted
17 Oct 2008
First published
17 Nov 2008

Lab Chip, 2009,9, 199-206

Rapid and selective concentration of microparticles in an optoelectrofluidic platform

H. Hwang and J. Park, Lab Chip, 2009, 9, 199 DOI: 10.1039/B811740C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements