Size based separation of microparticles using a dielectrophoretic activated system

Khoshmanesh, K, Zhang, C, Nahavandi, S, Tovar Lopez, F, Baratchi, S, Mitchell, A and Kalantar Zadeh, K 2010, 'Size based separation of microparticles using a dielectrophoretic activated system', Journal of Applied Physics, vol. 108, pp. 1-8.


Document type: Journal Article
Collection: Journal Articles

Title Size based separation of microparticles using a dielectrophoretic activated system
Author(s) Khoshmanesh, K
Zhang, C
Nahavandi, S
Tovar Lopez, F
Baratchi, S
Mitchell, A
Kalantar Zadeh, K
Year 2010
Journal name Journal of Applied Physics
Volume number 108
Start page 1
End page 8
Total pages 8
Publisher American Institute of Physics
Abstract This work describes the separation of polystyrene microparticles suspended in deionized (DI) water according to their dimensions using a dielectrophoretic (DEP) system. The DEP system utilizes curved microelectrodes integrated into a microfluidic system. Microparticles of 1, 6, and 15 μm are applied to the system and their response to the DEP field is studied at different frequencies of 100, 200, and 20 MHz. The microelectrodes act as a DEP barrier for 15 μm particles and retain them at all frequencies whereas the response of 1 and 6 μm particles depend strongly on the applied frequency. At 100 kHz, both particles are trapped by the microelectrodes. However, at 200 kHz, the 1 μm particles are trapped by the microelectrodes while the 6 μm particles are pushed toward the sidewalls. Finally, at 20 MHz, both particles are pushed toward the sidewalls. The experiments show the tunable performance of the system to sort the microparticles of various dimensions in microfluidic systems.
Keyword(s) Dielectrophoretic
Different frequency
Micro fluidic system
Micro-particles
Tunable performance
DOI - identifier 10.1063/1.3457226
Copyright notice © 2010 American Institute of Physics.
ISSN 0021-8979
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