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Dielectrophoretically assembled particles : feasibility for optofluidic systems
journal contribution
posted on 2010-10-01, 00:00 authored by Khashayar Khoshmanesh, C Zhang, J Campbell, A Kayani, Saeid Nahavandi, A Mitchell, K Kalantar-zadehThis 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.
History
Journal
Microfluidics and nanofluidicsVolume
9Issue
4-5Pagination
755 - 763Publisher
SpringerLocation
Heidelberg, GermanyPublisher DOI
ISSN
1613-4982eISSN
1613-4990Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2010, SpringerUsage metrics
Keywords
dielectrophoresismanipulationmicrofluidicsoptofluidicssilica particlesScience & TechnologyTechnologyPhysical SciencesNanoscience & NanotechnologyInstruments & InstrumentationPhysics, Fluids & PlasmasScience & Technology - Other TopicsPhysicsCORE WAVE-GUIDESLIQUID-CORESEPARATIONNANOPARTICLESSUSPENSIONSSIZEMechanical Engineering
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