Imaging Electrogenerated Chemiluminescence at Single Gold Nanowire Electrodes.
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.
Department of Chemistry, Temple University , Philadelphia, Pennsylvania 19122, United States.|Department of Chemistry, The University of Texas at Austin , Austin, Texas 78712, United States.
Andrew J
AJ
Wilson
Department of Chemistry, Temple University , Philadelphia, Pennsylvania 19122, United States.|Department of Chemistry, The University of Texas at Austin , Austin, Texas 78712, United States.
Kyle
K
Marchuk
Department of Chemistry, Temple University , Philadelphia, Pennsylvania 19122, United States.|Department of Chemistry, The University of Texas at Austin , Austin, Texas 78712, United States.
Katherine A
KA
Willets
Electrogenerated chemiluminescence; electrochemistry; nanoparticle electrode; nanowires; plasmonics