( Keynote ) Teaching an Old SECM New Tricks: Tunneling Photo-SECM

This paper is concerned with the development of amperometric and potentiometric tunneling modes of photo-SECM for nanoscale characterization of charge-transfer processes in semiconductor/co-catalyst systems. Potentiometric and amperometric experiments provide complementary information about local potential and surface reactivity. An extremely high spatial resolution (about 1-2 nm) was attained in tunneling mode SECM imaging of two-dimensional photocatalysts.