Non-linear electrochemical oscillator and sensor using the same

Details Non-linear electrochemical oscillator and sensor using the same Non-linear electrochemical oscillator and sensor using the same

1995-09-27

1997-03-04

Mis, David

Oscillators

With device responsive to external physical condition

331187, 73 5301, 73 6141, 204194, 364497, H03B 2800, G01N 2726, G01N 27333, G01N 2740

Patent

active

056083580

ABSTRACT:
To obtain a stable non-linear oscillator using polypyrrole, KCl liquid electrolyte is separated with a working electrode 14 provided with a polypyrrole film 14a. A counter electrode 16 is provided on one of the separated portions of the liquid electrolyte, and a reference electrode 12 is provided in the other separated liquid electrode portion. The counter electrode 16, working electrode 14 and reference electrode 12 are connected to a potentiostat 10. The potential on the working electrode 14 is set to be between the oxidizing and reducing potentials of polypyrrole. With oxidizing or reducing reaction of polypyrrole, an ion concentration gradient is produced in the liquid electrolyte across polypyrrole film to change the potentials on the reference and working electrodes 12 and 14, thus causing an oscillating current between the working and counter electrodes 14 and 16.

REFERENCES:
patent: 4317705 (1982-03-01), Hamada et al.
patent: 5198988 (1993-03-01), Dorr et al.
patent: 5280424 (1994-01-01), Rony et al.
M. Iseki et al., 1994 Electrical Oscillations Caused by Donor and Acceptor in Polypyrrole-Polycarbonate Composite Membrane, Tsukuba Research Center, NIMC-AIST, Japan, Mar. 22-25; pp. 67-68.
Jan Kotowski, et al., "Electrical oscillations in polyryrrole-lecithin bilayer lipid membranes", Bioelectrochemistry and Bioenergetics, 19 (1988) 283-289. J. Electroanal. Chem. No Month vol. 253, pp. 283-289.
Masahiro Iseki, et al. , "Electrical oscillations across polypyrrole membranes caused by electron donors and electron acceptors", Bioelectrochemistry and Bioenergetics, 34 (1994), pp. 149-152. No Month.

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