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A Structural Investigation of Polypyrrole as a Function of Oxidation State

Published online by Cambridge University Press:  01 February 2011

Mya R. Warren  and
John D. Madden
Mya R. Warren
Affiliation:
University of British Columbia
John D. Madden
Affiliation:
University of British Columbia
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Abstract

Polypyrrole exhibits actuation under electrochemical doping and undoping of the polymer matrix. Active strain and x-ray diffraction measurements are performed in order to correlate the microscopic and macroscopic structural changes occurring during actuation. Under galvanostatic reduction, the film shows first a linear contraction with oxidation state due to expulsion of small anions. At 50% of the as-grown doping level, the film reverses direction and begins to expand, possibly due to incorporation of the larger cations. X-ray diffraction, however, does not show a linear contraction or expansion in the crystalline portions of the polymer. The polymer crystallites go through a sudden contraction in one dimension of approximately 14%, and otherwise remain constant. The contraction in the polypyrrole crystals occurs at the 50% doping level, and may be correlated with the reversal of macroscopic actuation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 871: Symposium I – Organic Thin-Film Electronics , 2005 , I6.1
Copyright
Copyright © Materials Research Society 2005

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References

[1] Smela, E., Adv. Mater. 15, 481 (2003).Google Scholar
[2] Madden, J.D., Wandesteeg, N., Anquetil, P., Madden, P., Takshi, A., Pytel, R., Lafontaine, S., Wieringa, P., Hunter, I., IEEE J. Ocean. Eng. 29, 706 (2004).Google Scholar
[3] Pei, Q. and Inganäs, O., Solid State Ionics 60, 161 (1993).Google Scholar
[4] Kohlman, R.S. and Epstein, A., “Insulator-Metal Transition and Inhomogeneous Metallic State in Conducting Polymers,” Handbook of Conducting Polymers 2nd ed., ed. Skotheim, T., Elsenbaumer, R. and Reynolds, J. (Marcel Dekker, Inc., 1998) pp. 85–121.Google Scholar
[5] Buckley, L.J., Roylance, D.K., and Wnek, G.E., J. Polym. Sci. B: Poly. Phys. 25, 2179 (1987).Google Scholar
[6] Pruneau, S., Graupner, W., Oniciu, L., Brie, M., and Turcu, R., Mat. Chem. Phys. 46, 55 (1996).Google Scholar
[7] Yamaura, M., Sato, K., and Hagiwara, T., Synth. Met. 39, 43 (1990).Google Scholar
[8] Yamaura, M., Hagiwara, T., and Iwata, K., Synth. Met. 26, 209 (1988).Google Scholar
[9] Yoon, C., Sung, H., Kim, J., Barsoukov, E., Kim, J., Lee, H., Synth. Met. 99, 201 (1999).Google Scholar
[10] Madden, J.D., Madden, P.G., Anquetil, P. and Hunter, I., Mat. Res. Soc. Symp. 698, 137 (2002).Google Scholar
[11] Otero, T.F., Grande, H., and Rodríguez, T., Electrochimica Acta. 41, 1863 (1996).Google Scholar
[12] Nogami, Y., Pouget, J.P., and Ishiguro, T., Synth. Met. 62, 257 (1994).Google Scholar
[13] Pei, Q. and Inganäs, O., Synth. Met. 55-57, 3724 (1993).Google Scholar