Ionic Diode Characteristics at a Polymer of Intrinsic Microporosity (PIM) | Nafion “Heterojunction” Deposit on a Microhole Poly(ethylene-terephthalate) Substrate

Putra, B. R., Aaronson, B. D. B., Madrid, E., Mathwig, K., Carta, M., Malpass-Evans, R. & McKeown, N. B. 27-Jun-2017 In : Electroanalysis. 29, 10, p. 2217-2223 7 p.

Research output: Scientific - peer-reviewArticle

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  • Ionic Diode Characteristics at a Polymer of Intrinsic Microporosity (PIM)

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  • Budi Riza Putra
  • Barak D. B. Aaronson
  • Elena Madrid
  • Klaus Mathwig
  • Mariolino Carta
  • Richard Malpass-Evans
  • Neil B. McKeown
Ionic diode phenomena occur at asymmetric ionomer | aqueous electrolyte microhole interfaces. Depending on the applied potential, either an “open” or a “closed” diode state is observed switching between a high ion flow rate and a low ion flow rate. Physically, the “open” state is associated mainly with conductivity towards the microhole within the ionomer layer and the “closed” state is dominated by restricted diffusion-migration access to the microhole interface opposite to the ionomer. In this report we explore a “heterojunction” based on an asymmetric polymer of intrinsic microporosity (PIM) | Nafion ionomer microhole interface. Improved diode characteristics and current rectification are observed in aqueous NaCl. The effects of creating the PIM | Nafion micro-interface are investigated and suggested to lead to novel sensor architectures.
Original languageEnglish
Pages (from-to)2217-2223
Number of pages7
Issue number10
StatePublished - 27-Jun-2017

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