Dielectrophoretically assembled particles: Feasibility for optofluidic systems

Khoshmanesh, K, Zhang, C, Campbell, J, Kayani, A, Nahavandi, S, Mitchell, A and Kalantar Zadeh, K 2010, 'Dielectrophoretically assembled particles: Feasibility for optofluidic systems', Microfluidics and Nanofluidics, vol. 9, no. 45, pp. 755-763.


Document type: Journal Article
Collection: Journal Articles

Title Dielectrophoretically assembled particles: Feasibility for optofluidic systems
Author(s) Khoshmanesh, K
Zhang, C
Campbell, J
Kayani, A
Nahavandi, S
Mitchell, A
Kalantar Zadeh, K
Year 2010
Journal name Microfluidics and Nanofluidics
Volume number 9
Issue number 45
Start page 755
End page 763
Total pages 9
Publisher Springer
Abstract This work presents the dielectrophoretic manipulation of sub-micron particles suspended in water and the investigation of their optical responses using a microfluidic system. The particles are made of silica and have different diameters of 600, 450, and 250 nm. Experiments show a very interesting feature of the curved microelectrodes, in which the particles are pushed toward or away from the microchannel centerline depending on their levitation heights, which is further analyzed by numerical simulations. In doing so, applying an AC signal of 12 Vp-p and 5 MHz across the microelectrodes along with a flow rate of 1 μl/min within the microchannel leads to the formation of a tunable band of particles along the centerline. Experiments show that the 250 nm particles guide the longitudinal light along the microchannel due to their small scattering. This arrangement is employed to study the feasibility of developing an optofluidic system, which can be potentially used for the formation of particles-core/liquid-cladding optical waveguides.
Keyword(s) Dielectrophoresis
Manipulation
Microfluidics
Optofluidics
Silica particles
DOI - identifier 10.1007/s10404-010-0590-7
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ISSN 1613-4982
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