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Novel conducting polymer current limiting devices for low cost surge protection applications

Jabarullah, Noor H.; Verrelli, Emanuele; Mauldin, Clayton; Navarro, Luis A.; Golden, Josh; Madianos, Leonidas; Tsoukalas, Dimitris; Kemp, Neil T.


Noor H. Jabarullah

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Dr Emanuele Verrelli
Lecturer in Physics, Director of Postgraduate Researchers, Seminar organiser, First aider

Clayton Mauldin

Luis A. Navarro

Josh Golden

Leonidas Madianos

Dimitris Tsoukalas

Neil T. Kemp


We report on the development of novel intrinsic conducting polymer two terminal surge protection devices. These resettable current limiting devices consist of polyaniline nanofibres doped with methane sulphonic acid electrochemically deposited between two 55 μm spaced gold electrodes. At normal applied voltages, the low resistance devices act as passive circuit elements, not affecting the current flow. However during a current surge the devices switch from ohmic to non-ohmic behaviour, limiting current through the device. After the current surge has passed, the devices reset back to their original state. Our studies show that a partial de-doping/re-doping process caused by the rapid diffusion of moisture out of or into the polymer film during joule heating/cooling is the underlying mechanism responsible.


Jabarullah, N. H., Verrelli, E., Mauldin, C., Navarro, L. A., Golden, J., Madianos, L., …Kemp, N. T. (2014). Novel conducting polymer current limiting devices for low cost surge protection applications. Journal of applied physics, 116(16), 164501.

Acceptance Date Oct 1, 2014
Publication Date Oct 28, 2014
Deposit Date Jul 20, 2015
Publicly Available Date Jul 20, 2015
Journal Journal of applied physics
Print ISSN 0021-8979
Electronic ISSN 1089-7550
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 116
Issue 16
Article Number ARTN 164501
Pages 164501
Keywords Conducting polymers
Public URL
Publisher URL
Additional Information The following article appeared in J. Appl. Phys. 116, 164501 (2014) and may be found at


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