Paper Titles
A Study on the Strength under Pressure of Micro Heat Exchanger
p.265
Realization of a Chip-Level Batch Process Chemical Plant with Quantitative Performance Evaluation
p.269
Interfacial Residual Stress Measurement of SiC/Epoxy Composites by Microphotoelastic Method
p.273
Correlation between Microstructure and Nanohardness in Advanced Heat-Resistant Steel
p.277
Holding Capacity of a Dielectrophoretic Barrier for Microparticles
p.281
Effect of Film Thicknesses of TbFe and SmFe on Magnetostrictions for Micro-Wireless Actuators
p.285
Study on the Lateral Piezoelectric Actuator with Actuation Range Amplifying Structure
p.289
Thermal Transport Properties of Various Thin Films for MEMS Applications
p.293
Surface Modification Effect of Wettability on the Performance of PDMS-Based Valveless Micropump
p.297

Holding Capacity of a Dielectrophoretic Barrier for Microparticles

Article Preview

Abstract:

A dielectrophoretic barrier is generated with two layers of microelectrode structures so called paired electrode array (PEA) constructing face to face on the top and bottom sides of a microchannel. The barrier is designed to control the movement of particles in combination with a fluid flow. Depending on the relative strength of the DEP force and hydrodynamic force, microparticles or cells carrying by a laminar flow can either penetrate the barrier or be deflected from there. The threshold velocity at which the barrier firstly fails to hold back the particles is a significant parameter to validate the performance of the device. This paper presents an experimental study on the performance of the microfabricated paired electrode array. The electrodes were fabricated with conventional microfabrication techniques. Micron-sized latex beads were used in the investigation. The holding capacity was defined by measuring the threshold velocity of the system. The results provide crucial information for the design of the dielectrophoretic barrier for microparticle manipulation and separation.

You might also be interested in these eBooks
Experimental Mechanics in Nano and Biotechnology View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 326-328)

Pages:

281-284

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.326-328.281

Citation:

Cite this paper

Online since:

December 2006

Authors:

Da Feng Chen, He Jun Du, Wei Hua Li, Hai Qing Gong

Keywords:

DEP, Dielectrophoresis, Micro-Fabrication, Paired Electrode Array, Threshold Velocity

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2006 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] T. B. Jones, Electromechanics of particles. Cambridge ; Cambridge University Press, (1995).

Google Scholar

[2] X.B. Wang, Y. Huang, J. P. H. Buit, G. H. Markx, and R. Pethig, J. Phys. D: Appl. Phys., vol. 26, pp.1278-1285, (1993).

Google Scholar

[3] G. H. Markx, M. S. Talary, and R. Pethig, J. Biotech., vol. 32, pp.29-37, (1994).

Google Scholar

[4] X. B. Wang, Y. Huang, P. R. C. Gascoyne, and F. F. Becker, IEEE Trans. Ind. Appl., vol. 33, pp.660-69, (1997).

Google Scholar

[5] H. B. Li and R. Bashir, Sens. Actuat. B - Chem., vol. 86, pp.215-21, (2002).

Google Scholar

[6] N. G. Green and H. Morgan, J. Phys. D: Appl. Phys., vol. 30, pp.2626-33, (1997).

Google Scholar

[7] R. Pethig, Y. Huang, X. B. Wang, and J. P. H. Burt, J. Phys. D: Appl. Phys., vol. 25, pp.881-8, (1992).

Google Scholar

[8] T. Schnelle, T. Muller, C. Reichle, and G. Fuhr, Appl. Phys. B, vol. 70, pp.267-74, (2000).

Google Scholar

[9] D. F. Chen, H. Du, W. H. Li, and C. Shu, J. Micromech. Microeng., vol. 15, pp.1040-1048, (2005).

Google Scholar