title: Probing redox photocatalysis of trapped electrons and holes on single Sb-doped titania nanorod surfaces.
abstract: We used a fluorogenic reaction to study in conjunction the photocatalytic properties for both active sites (trapped photogenerated electrons and holes) on individual Sb-doped TiO(2) nanorods with single-molecule fluorescence microscopy. It was found that active sites around trapped holes show higher activity, stronger binding ability, and a different dissociation mechanism for the same substrate and product molecules in comparison with the active sites around trapped electrons. These differences could be elucidated by a model involving the charged microenvironments around the active sites.
authors.affiliation: Department of Chemistry, University of California, Berkeley, California 94720, USA.
authors.forename: Weilin
authors.initials: W
authors.lastname: Xu
authors.forename: Prashant K
authors.initials: PK
authors.lastname: Jain
authors.forename: Brandon J
authors.initials: BJ
authors.lastname: Beberwyck
authors.forename: A Paul
authors.initials: AP
authors.lastname: Alivisatos