<i>In-Situ</i> Spectro-Electrochemistry of Conductive Polymers Using Plasmonics to Reveal Doping Mechanisms.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 36468680.
- Also identified by DOI 10.1021/acsnano.2c09081 and PMC identifier 9798863.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
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 <i>in-situ</i> spectro-electrochemical technique to observe redox dynamics of conductive polymers in an extremely localized volume (<100 nm<sup>3</sup>). 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.