title: Single-particle studies of band alignment effects on electron transfer dynamics from semiconductor hetero-nanostructures to single-walled carbon nanotubes.
abstract: We utilize single-molecule spectroscopy combined with time-correlated single-photon counting to probe the electron transfer (ET) rates from various types of semiconductor hetero-nanocrystals, having either type-I or type-II band alignment, to single-walled carbon nanotubes. A significantly larger ET rate was observed for type-II ZnSe/CdS dot-in-rod nanostructures as compared to type-I spherical CdSe/ZnS core/shell quantum dots and to CdSe/CdS dot-in-rod structures. Furthermore, such rapid ET dynamics can compete with both Auger and radiative recombination processes, with significance for effective photovoltaic operation.
authors.affiliation: Research Center for Applied Sciences, Academia Sinica, 128 Academia Road, Taipei 115-29, Taiwan.
authors.forename: Chi-Tsu
authors.initials: CT
authors.lastname: Yuan
authors.forename: Yong-Gang
authors.initials: YG
authors.lastname: Wang
authors.forename: Kuo-Yen
authors.initials: KY
authors.lastname: Huang
authors.forename: Ting-Yu
authors.initials: TY
authors.lastname: Chen
authors.forename: Pyng
authors.initials: P
authors.lastname: Yu
authors.forename: Jau
authors.initials: J
authors.lastname: Tang
authors.forename: Amit
authors.initials: A
authors.lastname: Sitt
authors.forename: Uri
authors.initials: U
authors.lastname: Banin
authors.forename: Oded
authors.initials: O
authors.lastname: Millo
mesh_terms: D004553:Electric Conductivity; D004579:Electron Transport; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D012666:Semiconductors; D014025:Titanium / Q000737:chemistry*
chemical_list: C009495:titanium dioxide; D014025:Titanium