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Large dopant dependence of the current limiting properties of intrinsic conducting polymer surge protection devices

Jabarullah, Noor H.; Verrelli, Emanuele; Gee, Alex; Mauldin, Clayton; Navarro, Luis A.; Golden, Josh H.; Kemp, Neil T.


Noor H. Jabarullah

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

Alex Gee

Clayton Mauldin

Luis A. Navarro

Josh H. Golden

Neil T. Kemp


New two terminal surge protection devices based on intrinsic conducting polymers are demonstrated to be strongly affected by the dopant molecule type. Thermogravimetric analysis combined with current–voltage studies show a causal link between the dopant molecule, moisture content and the current limiting capability of the devices. Polyaniline thin-films with high moisture content produce devices with current saturation and foldback effects at high applied voltages while low moisture content films exhibit no current rectification and instead demonstrate decreasing resistivity with increasing voltage. Polyaniline doped with sulfuric acid (H2SO4) exhibited the largest moisture content and surge protection devices built with this material produced for the first time negative differential resistance under ambient conditions. A further improvement was made upon this through surface engineering of the interface between the polymer and electrodes using self-assembled monolayers.


Jabarullah, N. H., Verrelli, E., Gee, A., Mauldin, C., Navarro, L. A., Golden, J. H., & Kemp, N. T. (in press). Large dopant dependence of the current limiting properties of intrinsic conducting polymer surge protection devices. RSC advances, 6(89), 85710-85717.

Journal Article Type Article
Acceptance Date Sep 4, 2016
Online Publication Date Sep 5, 2016
Deposit Date Sep 12, 2016
Publicly Available Date Sep 12, 2016
Journal RSC advances
Print ISSN 2046-2069
Electronic ISSN 2046-2069
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 6
Issue 89
Pages 85710-85717
Keywords Dopants
Public URL
Publisher URL!divAbstract
Additional Information : This document is Similarity Check deposited; : Noor H. Jabarullah (ORCID); : Neil T. Kemp (ORCID); : The Royal Society of Chemistry has an exclusive publication licence for this journal; : Single-blind; : Received 21 July 2016; Accepted 4 September 2016; Accepted Manuscript published 5 September 2016; Version of Record published 8 September 2016


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