Journal
NANO LETTERS
Volume 15, Issue 9, Pages 6110-6115Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b02383
Keywords
Electrogenerated chemiluminescence; electrochemistry; plasmonics; nanowires; nanoparticle electrode
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Funding
- Department of Energy (DOE), Office of Science, Basic Energy Science (BES) [DE-SC0010307]
- AFOSR MURI [FA9550-14-1-1003]
- Temple University
- U.S. Department of Energy (DOE) [DE-SC0010307] Funding Source: U.S. Department of Energy (DOE)
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We report electrogenerated chemiluminescence (ECL) generated at single gold nanowire electrodes supported on tin-doped indium oxide. Unlike other single nanoparticle electrochemical characterization techniques, ECL provides a massively parallel direct readout of electrochemical activity on individual nanoparticle electrodes without the need for extrinsic illumination or a scanning electrochemical probe. While ECL is not observed from as-purchased nanowires due to the surfactant layer, by removing the layer and coating the nanowires with a polymer blend, ECL from single nanowire electrodes is readily measured. With an increase in polymer thickness, an increase in ECL image quality and reproducibility over multiple redox cycles is observed. The polymer coating also provides a strategy for stabilizing gold nanoparticle electrodes against complete surface oxidation in aqueous environments.
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