Observing Transient Bipolar Electrochemical Coupling on Single Nanoparticles Translocating through a Nanopore.

摘要: We report the observation of transient bipolar electrochemical coupling on freely moving 40 nm silver nanoparticles. The use an asymmetric nanoelectrochemical environment at nanopore orifice, for example, acid inside pipette and halide ions in bulk, enabled us to observe unusually large current blockages single Ag attribute these formation H2 nanobubbles surface nanoparticles due coupled faradaic reactions, which reduction protons water is oxidation under potentials higher than 1 V. appearance was strongly dependent applied voltage choice anions bulk solution. correlation between with their translocation further supported by simultaneous fluorescence electric recordings. This study demonstrates that electrochemistry can t...