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Impact of surface roughness on Dielectrophoretically assisted concentration of microorganisms over PCB based platforms

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Abstract

This article presents a PCB based microfluidic platform for performing a dielectrophoretic capture of live microorganisms over inter-digitated electrodes buried under layers of different surface roughness values. Although dielectrophoresis has been extensively studied earlier over silicon and polymer surfaces with printed electrodes the issue of surface roughness particularly in case of buried electrodes has been seldom investigated. We have addressed this issue through a layer of spin coated PDMS (of various surface roughness) that is used to cover the printed electrodes over a printed circuit board. The roughness in the PDMS layer is generally defined by the roughness of the FR4 base which houses the printed electrodes as well as other structures. Possibilities arising out of COMSOL simulations have been well validated experimentally in this work.

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Authors and Affiliations

  1. Microsystems Fabrication Laboratory, Department of Mechanical Engineering, Indian Institute of Technology, Kanpur, Kanpur, India

    Geeta Bhatt, Rishi Kant, Kuldeep Yadav & Shantanu Bhattacharya

  2. Chemistry Department, Indian Institute of Technology, Kanpur, Kanpur, India

    Keerti Mishra, Deepak Singh & Ramanathan Gurunath

  3. Design Program, Indian Institute of Technology, Kanpur, Kanpur, India

    Shantanu Bhattacharya

Authors
  1. Geeta Bhatt
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  2. Rishi Kant
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  3. Keerti Mishra
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  4. Kuldeep Yadav
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  5. Deepak Singh
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  6. Ramanathan Gurunath
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  7. Shantanu Bhattacharya
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Correspondence to Shantanu Bhattacharya.

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Bhatt, G., Kant, R., Mishra, K. et al. Impact of surface roughness on Dielectrophoretically assisted concentration of microorganisms over PCB based platforms. Biomed Microdevices 19, 28 (2017). https://doi.org/10.1007/s10544-017-0172-5

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  • DOI: https://doi.org/10.1007/s10544-017-0172-5

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