TY - JOUR
T1 - In-Situ Spectro-Electrochemistry of Conductive Polymers Using Plasmonics to Reveal Doping Mechanisms
AU - Peng, Jialong
AU - Lin, Qianqi
AU - Földes, Tamás
AU - Jeong, Hyeon-Ho
AU - Xiong, Yuling
AU - Pitsalidis, Charalampos
AU - Malliaras, George G.
AU - Rosta, Edina
AU - Baumberg, Jeremy J.
N1 - Funding Information:
We are grateful to B. de Nijs for support with fabrication, S. Hu for helping with SERS measurements, as well as the NanoPhotonics Centre and the Nanoscience Centre at the University of Cambridge for technical support. We acknowledge EPSRC grants (EP/N016920/1, EP/L027151/1, EP/T024550/1, EP/R013012/1, NanoDTC EP/L015978/1, EP/S022953/1), and ERC grants (project no. 883703 PICOFORCE, 861950 POSEIDON, and 757850 BioNet). J.P. acknowledges the support from the National Natural Science Foundation of China (62105369). H.-H.J. acknowledges support from NRF grant (NRF-2021R1C1C1005060), DGIST R&D Program (21-IJRP-01), GIST Research Institute grant in 2021.
Publisher Copyright:
© 2022 The Authors. Published by American Chemical Society.
PY - 2022/12/27
Y1 - 2022/12/27
N2 - 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.
AB - 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.
UR - https://doi.org/10.1021/acsnano.2c09081
U2 - 10.1021/acsnano.2c09081
DO - 10.1021/acsnano.2c09081
M3 - Article
SN - 1936-0851
JO - ACS nano
JF - ACS nano
ER -