Microfluidics and Nanofluidics

, Volume 9, Issue 4–5, pp 755–763

Dielectrophoretically assembled particles: feasibility for optofluidic systems

  • Khashayar Khoshmanesh
  • Chen Zhang
  • Jos L. Campbell
  • Aminuddin A. Kayani
  • Saeid Nahavandi
  • Arnan Mitchell
  • Kourosh Kalantar-zadeh
Research Paper

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.

Keywords

Dielectrophoresis Manipulation Microfluidics Optofluidics Silica particles 

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Khashayar Khoshmanesh
    • 1
  • Chen Zhang
    • 2
  • Jos L. Campbell
    • 3
  • Aminuddin A. Kayani
    • 2
  • Saeid Nahavandi
    • 1
  • Arnan Mitchell
    • 2
  • Kourosh Kalantar-zadeh
    • 2
    • 4
  1. 1.Centre for Intelligent Systems ResearchDeakin UniversityGeelongAustralia
  2. 2.School of Electrical and Computer EngineeringRMIT UniversityMelbourneAustralia
  3. 3.School of Applied SciencesRMIT UniversityMelbourneAustralia
  4. 4.Chemical Engineering DepartmentMassachusetts Institute of Technology (MIT)CambridgeUSA

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