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Micromachines 2015, 6(1), 110-120; doi:10.3390/mi6010110

Coplanar Electrode Layout Optimized for Increased Sensitivity for Electrical Impedance Spectroscopy

1
Department of Micro- and Nanotechnology, Technical University of Denmark, Oersteds Plads 345 East, DK 2800 Kgs. Lyngby, Denmark
2
SBT Aqua ApS, Diplomvej 381, 2800 Kgs. Lyngby, Denmark
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Jeong-Bong Lee
Received: 17 November 2014 / Accepted: 24 December 2014 / Published: 30 December 2014
(This article belongs to the Collection Lab-on-a-Chip)
View Full-Text   |   Download PDF [4513 KB, uploaded 30 December 2014]   |  

Abstract

This work describes an improvement in the layout of coplanar electrodes for electrical impedance spectroscopy. We have developed, fabricated, and tested an improved electrode layout, which improves the sensitivity of an impedance flow cytometry chip. The improved chip was experimentally tested and compared to a chip with a conventional electrode layout. The improved chip was able to discriminate 0.5 μm beads from 1 μm as opposed to the conventional chip. Furthermore, finite element modeling was used to simulate the improvements in electrical field density and uniformity between the electrodes of the new electrode layout. Good agreement was observed between the model and the obtained experimental results. View Full-Text
Keywords: electrical impedance spectroscopy; sensitivity; improved design; impedance flow cytometry electrical impedance spectroscopy; sensitivity; improved design; impedance flow cytometry
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Clausen, C.H.; Skands, G.E.; Bertelsen, C.V.; Svendsen, W.E. Coplanar Electrode Layout Optimized for Increased Sensitivity for Electrical Impedance Spectroscopy. Micromachines 2015, 6, 110-120.

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