Imaging electrochemical reactions at the nanoscale
We also use molecules that change their emission properties based on their redox state. For example, we were the first group to observe electrogenerated chemiluminescence at the surface of single nanoparticle electrodes, as shown below.
V. Sundaresan, J.W. Monaghan, K.A. Willets. "Visualizing the Effect of Partial Oxide Formation on Single Silver Nanoparticle Electrodissolution." J. Phys. Chem. C. DOI: 10.1021/acs.jpcc.7b11824 (2018).
Y. Yu, V. Sundaresan, S. Bandyopadhyay, Y. Zhang, M.A. Edwards, K. McKelvey, H.S. White, K.A. Willets. “Three-Dimensional Super-Resolution Imaging of Single Nanoparticles Delivered by Pipettes.” ACS Nano. 11, 10529 (2017).
V. Sundaresan, K. Marchuk, Y. Yu, E.J. Titus, A.J. Wilson, C.M. Armstrong, B. Zhang, K.A. Willets. “Visualizing and Calculating Tip-Substrate Distance in Nanoscale Scanning Electrochemical Microscopy Using 3-Dimensional Super-Resolution Optical Imaging.” Analytical Chemistry. 89, 922 (2017).
A.J. Wilson, K. Marchuk, K.A. Willets. “Imaging electrogenerated chemiluminescence at single gold nanowire electrodes.” Nano Lett. 15, 6100 (2015).
C. Renault, K. Marchuk, H.S. Ahn, E.J. Titus, J. Kim, K.A. Willets, A.J. Bard. “Observation of nanometer-sized electro-active defects in insulating layers by fluorescence microscopy and electrochemistry.” Anal Chem. 87, 5730 (2015).