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Proceedings Paper

Electronic nose for detecting multiple targets
Author(s): Anirban Chakraborty; Ganga Parthasarathi; Rakesh Poddar; Weiqiang Zhao; Cheng Luo
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Paper Abstract

The discovery of high conductivity in doped polyacetylene in 1977 (garnering the 2000 Nobel Prize in Chemistry for the three discovering scientists) has attracted considerable interest in the application of polymers as the semiconducting and conducting materials due to their promising potential to replace silicon and metals in building devices. Previous and current efforts in developing conducting polymer microsystems mainly focus on generating a device of a single function. When multiple micropatterns made of different conducting polymers are produced on the same substrate, many microsystems of multiple functions can be envisioned. For example, analogous to the mammalian olfactory system which includes over 1,000 receptor genes in detecting various odors (e.g., beer, soda etc.), a sensor consisting of multiple distinct conducting polymer sensing elements will be capable of detecting a number of analytes simultaneously. However, existing techniques present significant technical challenges of degradation, low throughput, low resolution, depth of field, and/or residual layer in producing conducting polymer microstructures. To circumvent these challenges, an intermediate-layer lithography method developed in our group is used to generate multiple micropatterns made of different, commonly used conducting polymers, Polypyrrole (PPy), Poly(3,4-ethylenedioxy)thiophene (PEDOT) and Polyaniline (PANI). The generated multiple micropatterns are further used in an "electronic nose" to detect water vapor, glucose, toluene and acetone.

Paper Details

Date Published: 18 May 2006
PDF: 10 pages
Proc. SPIE 6223, Micro (MEMS) and Nanotechnologies for Space Applications, 622309 (18 May 2006); doi: 10.1117/12.666424
Show Author Affiliations
Anirban Chakraborty, Tulane School of Medicine (United States)
Ganga Parthasarathi, Tulane School of Medicine (United States)
Rakesh Poddar, Tulane School of Medicine (United States)
Weiqiang Zhao, Tulane School of Medicine (United States)
Cheng Luo, Louisiana Tech Univ. (United States)

Published in SPIE Proceedings Vol. 6223:
Micro (MEMS) and Nanotechnologies for Space Applications
Thomas George; Zhong-Yang Cheng, Editor(s)

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