Peng, Jialong;
Lin, Qianqi;
Földes, Tamás;
Jeong, Hyeon-Ho;
Xiong, Yuling;
Pitsalidis, Charalampos;
Malliaras, George G;
... Baumberg, Jeremy J; + view all
(2022)
In-Situ Spectro-Electrochemistry of Conductive Polymers Using Plasmonics to Reveal Doping Mechanisms.
ACS Nano
10.1021/acsnano.2c09081.
(In press).
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Abstract
Conducting polymers are a key component for developing wearable organic electronics, but tracking their redox processes at the nanoscale to understand their doping mechanism remains challenging. Here we present an in-situ spectro-electrochemical technique to observe redox dynamics of conductive polymers in an extremely localized volume (<100 nm3). Plasmonic nanoparticles encapsulated by thin shells of different conductive polymers provide actively tuned scattering color through switching their refractive index. Surface-enhanced Raman scattering in combination with cyclic voltammetry enables detailed studies of the redox/doping process. Our data intriguingly show that the doping mechanism varies with polymer conductivity: a disproportionation mechanism dominates in more conductive polymers, while sequential electron transfer prevails in less conductive polymers.
| Type: | Article |
|---|---|
| Title: | In-Situ Spectro-Electrochemistry of Conductive Polymers Using Plasmonics to Reveal Doping Mechanisms |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acsnano.2c09081 |
| Publisher version: | https://doi.org/10.1021/acsnano.2c09081 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). |
| Keywords: | Conductive polymers, redox, doping mechanism, spectro-electrochemistry, plasmonics, nanoparticle, surface-enhanced Raman scattering |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10161518 |
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