title: Probing spatially dependent photoinduced charge transfer dynamics to TiO2 nanoparticles using single quantum dot modified atomic force microscopy tips.
abstract: Using single CdSe/CdS quantum dot (QD) functionalized atomic force microscopy (AFM) tips, we demonstrate that the spatial dependence of photoinduced electron transfer dynamics from the single QD to TiO2 nanoparticles can be controlled and probed with high spatial (subdiffraction-limited) and temporal (limited by fluorescence microscopy) resolutions. This finding suggests the feasibility of using electron donor or acceptor modified AFM tips for simultaneous high resolution imaging of morphology and photoinduced charge transfer dynamics in nanomaterials.
authors.affiliation: Department of Chemistry, Emory University , Atlanta, Georgia 30322 United States.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Liu
authors.forename: Haiming
authors.initials: H
authors.lastname: Zhu
authors.forename: Nianhui
authors.initials: N
authors.lastname: Song
authors.forename: Tianquan
authors.initials: T
authors.lastname: Lian
mesh_terms: D002104:Cadmium / Q000737:chemistry; D019187:Cadmium Compounds / Q000737:chemistry; D018625:Microscopy, Atomic Force; D053758:Nanoparticles / Q000737:chemistry*; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry; D013455:Sulfur / Q000737:chemistry; D014025:Titanium / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D018036:Selenium Compounds; D002104:Cadmium; C009495:titanium dioxide; D013455:Sulfur; C058667:cadmium selenide; D014025:Titanium