title: Electrochemical reactions in subfemtoliter-droplets studied with plasmonics-based electrochemical current microscopy.
abstract: We report on a plasmonics-based electrochemical current imaging of redox reactions in aqueous droplets with diameters varying from a few hundred nanometers (tens of attoliter in volume) to a few micrometers. The imaging technique allows us to obtain cyclic voltammograms of multiple droplets on a gold electrode simultaneously and to examine the local redox reactions within a droplet. The results are supported by numerical simulations. The work demonstrates a new capability of studying electrochemistry in microdroplets, which offers an opportunity to understand electrochemical reactions within a small confined volume.
authors.affiliation: Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287-5706, United States.
authors.forename: Yixian
authors.initials: Y
authors.lastname: Wang
authors.forename: Xiaonan
authors.initials: X
authors.lastname: Shan
authors.forename: Fengjuan
authors.initials: F
authors.lastname: Cui
authors.forename: Jinghong
authors.initials: J
authors.lastname: Li
authors.forename: Shaopeng
authors.initials: S
authors.lastname: Wang
authors.forename: Nongjian
authors.initials: N
authors.lastname: Tao
mesh_terms: D004553:Electric Conductivity; D004563:Electrochemistry / Q000295:instrumentation* / Q000379:methods; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D008853:Microscopy / Q000295:instrumentation* / Q000379:methods; D053758:Nanoparticles / Q000737:chemistry; D010084:Oxidation-Reduction; D010316:Particle Size; D020349:Surface Plasmon Resonance / Q000295:instrumentation* / Q000379:methods
chemical_list: D006046:Gold