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Polyaniline Protonation and Deprotonation Process as the Main Mechanism for Ionic Field Effect Sensors

Published online by Cambridge University Press:  07 July 2015

José Renato Alcarás ,
Hugo J.N.P.D. Mello  and
Marcelo Mulato
José Renato Alcarás
Affiliation:
Department of Physics, Faculty of Philosophy, Sciences and Letters at Ribeirão Preto, University of São Paulo (USP), Brazil.
Hugo J.N.P.D. Mello
Affiliation:
Department of Physics, Faculty of Philosophy, Sciences and Letters at Ribeirão Preto, University of São Paulo (USP), Brazil.
Marcelo Mulato
Affiliation:
Department of Physics, Faculty of Philosophy, Sciences and Letters at Ribeirão Preto, University of São Paulo (USP), Brazil.
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Abstract

In this work, Polyaniline (PANI) was used as a sensing film for pH measures due to its characteristic of switching protonation states under acid and alkaline solutions. Equally produced films had their sensitivity (electric response versus pH) measured before and after being under the influence of a constant electric potential (from 3.5 to 6 V, one for each film) for the analysis on how the electric potential influenced the sensitivity. Then, the protonation caused by the application of the first potential was reversed by applying a constant 5 V reverse potential and the sensitivity was then evaluated again. The results show, on average, a constant relation between intensity of protonation and the potential applied and that the process of protonation is reversible by applying a higher opposite potential then the protonation one.

Keywords

absorptionpolymersensor
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1795: Symposium II – Organic Bioelectronics―Materials, Processes and Applications , 2015 , pp. 41 - 46
Copyright
Copyright © Materials Research Society 2015 

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References

REFERENCES

Arsov, L. D., Plieth, W., and Koßmehl, G., “Electrochemical and Raman spectroscopic study of polyaniline; Influence of the potential on the degradation of polyaniline,” J. Solid State Electrochem., vol. 2, no. 5, pp. 355–361, 1998.CrossRefGoogle Scholar
Gul, S., Shah, A.-H. A., and Bilal, S., “Synthesis and Characterization of Processable Polyaniline Salts,” J. Phys. Conf. Ser., vol. 439, no. 1, p. 012002, Jun. 2013.CrossRefGoogle Scholar
Gvozdenović, Milica M., Jugović, Branimir Z., Stevanović, Jasmina S., Trišović, Tomislav Lj. and Grgur, Branimir N. (2011). Electrochemical Polymerization of Aniline, Electropolymerization, Dr. Ewa Schab-Balcerzak (Ed.), ISBN: 978-953-307-693-5, InTech, Available from: http://www.intechopen.com/books/electropolymerization/electrochemical-polymerization-of-aniline Google Scholar
Camalet, J. L., Lacroix, J. C., Aeiyach, S., Chane-Ching, K., and Lacaze, P. C., “Electrosynthesis of adherent polyaniline films on iron and mild steel in aqueous oxalic acid medium,” Synth. Met., vol. 93, no. 2, pp. 133–142, Mar. 1998.CrossRefGoogle Scholar
Bonastre, A. M. and Bartlett, P. N., “Electrodeposition of PANi films on platinum needle type microelectrodes. Application to the oxidation of ascorbate in human plasma,” Anal. Chim. Acta, vol. 676, no. 1–2, pp. 1–8, Aug. 2010.CrossRefGoogle Scholar
Tallman, D. E., Vang, C., Wallace, G. G., and Bierwagen, G. P., “Direct Electrodeposition of Polypyrrole on Aluminum and Aluminum Alloy by Electron Transfer Mediation,” J. Electrochem. Soc., vol. 149, no. 3, pp. C173–C179, Mar. 2002.CrossRefGoogle Scholar
van der spiegel, J., Lauks, I., Chan, P., and Babic, D., “The extended gate chemically sensitive field effect transistor as multi-species microprobe,” Sensors Actuators, vol. 4, pp. 291–298, 1983.CrossRefGoogle Scholar