Dielectrophoretically assembled particles : feasibility for optofluidic systems

Khoshmanesh, Khashayar, Zhang, Chen, Campbell, Jos L., Kayani, Aminuddin A., Nahavandi, Saeid, Mitchell, Arnan and Kalantar-zadeh, Kourosh 2010, Dielectrophoretically assembled particles : feasibility for optofluidic systems, Microfluidics and nanofluidics, vol. 9, no. 4-5, pp. 755-763, doi: 10.1007/s10404-010-0590-7.

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Title Dielectrophoretically assembled particles : feasibility for optofluidic systems
Author(s) Khoshmanesh, Khashayar
Zhang, Chen
Campbell, Jos L.
Kayani, Aminuddin A.
Nahavandi, SaeidORCID iD for Nahavandi, Saeid orcid.org/0000-0002-0360-5270
Mitchell, Arnan
Kalantar-zadeh, Kourosh
Journal name Microfluidics and nanofluidics
Volume number 9
Issue number 4-5
Start page 755
End page 763
Total pages 9
Publisher Springer
Place of publication Heidelberg, Germany
Publication date 2010-10
ISSN 1613-4982
1613-4990
Keyword(s) dielectrophoresis
manipulation
microfluidics
optofluidics
silica particles
Summary 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.
Language eng
DOI 10.1007/s10404-010-0590-7
Field of Research 091306 Microelectromechanical Systems (MEMS)
Socio Economic Objective 970102 Expanding Knowledge in the Physical Sciences
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2010
Copyright notice ©2010, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30031092

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