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Sensors 2008, 8(3), 1774-1796; doi:10.3390/s8031774
Article

Development and Demonstration of Measurement-Time Efficient Methods for Impedance Spectroscopy of Electrode and Sensor Arrays

* ,
 and
Scribner Associates Inc., 150 E. Connecticut Avenue, Southern Pines, North Carolina 28387, USA
* Author to whom correspondence should be addressed.
Received: 12 February 2008 / Accepted: 11 March 2008 / Published: 14 March 2008
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Abstract

The development of impedance-based array devices is hindered by a lack ofrobust platforms and methods upon which to evaluate and interrogate sensors. One aspectto be addressed is the development of measurement-time efficient techniques forbroadband impedance spectroscopy of large electrode arrays. The objective of this workwas to substantially increase the low frequency impedance measurement throughputcapability of a large channel count array analyzer by developing true parallel measurementmethods. The goal was achieved by Fourier transform-based analysis of simultaneouslyacquiredmulti-channel time-based current and voltage data. Efficacy and quantitativeanalysis of the parallel approach at frequencies less than ca. 10 Hz as well as a combinedsequential parallel approach for efficient broadband impedance spectroscopy over 5-orders of magnitude in frequency is demonstrated through complex impedancemeasurement of arrays consisting of up to 100 elements.
Keywords: Array; sensor; impedance spectroscopy; measurement methods Array; sensor; impedance spectroscopy; measurement methods
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Cooper, K.R.; Smith, M.; Johnson, D. Development and Demonstration of Measurement-Time Efficient Methods for Impedance Spectroscopy of Electrode and Sensor Arrays. Sensors 2008, 8, 1774-1796.

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