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- Title
Ionic Diode Characteristics at a Polymer of Intrinsic Microporosity (PIM) | Nafion 'Heterojunction' Deposit on a Microhole Poly(ethylene-terephthalate) Substrate.
- Authors
Putra, Budi Riza; Aaronson, Barak D.B.; Madrid, Elena; Mathwig, Klaus; Carta, Mariolino; Malpass‐Evans, Richard; McKeown, Neil B.; Marken, Frank
- Abstract
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.
- Subjects
POLYETHYLENE terephthalate; AQUEOUS electrolytes; MICROPOROSITY; ELECTRIC conductivity; HETEROJUNCTIONS; EMIGRATION &; immigration
- Publication
Electroanalysis, 2017, Vol 29, Issue 10, p2217
- ISSN
1040-0397
- Publication type
Article
- DOI
10.1002/elan.201700247