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Electrophoretic Integration of Polyaniline on NIST Microhotplate for Gas Sensing

  • Guofeng Li (a1) (a2) and Steve Semancik (a1)

Abstract

We present a method for controlled deposition of polyaniline from a colloidal suspension. Stable suspensions of polyaniline colloids were formed by dispersing polyaniline/formic-acid solutions into acetonitrile. It is demonstrated that the positively charged polyaniline colloids can be electrophoretically patterned onto microfabricated device features with great precision and control. Futhermore, the electrophoretically deposited polyaniline films reveal a nanoporous morphology, which greatly enhances the gas diffusion that leads to improved sensor performance.

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Corresponding author

*Corresponding authors: Guofeng Li, Email: guofeng.li@nist.gov; Phone: 301-975-4782; Mailing address: NIST, 100 Bureau Drive, MS 8362, Gaithersburg, MD 20899-8362, USA

References

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1. Stejskal, J., J. Poly. Mat. 18, 225258 (2001).
2. Li, G., Martinez, C., and Semancik, S., J. Am. Chem. Soc. 127, 49034909 (2005).
3. Semancik, S., Cavicchi, R. E., Wheeler, M. C., Tiffany, J. E., Poirier, G. E., Walton, R. M., Suehle, J. S., Panchapakesan, B., and DeVoe, D. L., Sensors & Actuators B. 77, 579591 (2001).
4. Li, G., Josowicz, M., Janata, J., and Semancik, S., Appl. Phys. Lett. 85, 11871189 (2004).

Electrophoretic Integration of Polyaniline on NIST Microhotplate for Gas Sensing

  • Guofeng Li (a1) (a2) and Steve Semancik (a1)

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