title: Singlet oxygen generation from water-soluble quantum dot-organic dye nanocomposites.
abstract: Water-soluble quantum dot-organic dye nanocomposites have been prepared via electrostatic interaction. We used CdTe quantum dots with diameters up to 3.4 nm, 2-aminoethanethiol as a stabilizer, and meso-tetra(4-sulfonatophenyl)porphine dihydrochloride (TSPP) as an organic dye. The photophysical properties of the nanocomposite have been investigated. The fluorescence of the parent CdTe quantum dot is largely suppressed. Instead, indirect excitation of the TSPP moiety leads to production of singlet oxygen with a quantum yield of 0.43. The nanocomposite is sufficiently photostable for biological applications.
authors: Department of Chemistry and Biochemistry, California State University, Los Angeles, California 90032-8202, USA.
authors: Lixin
authors: L
authors: Shi
authors: Billy
authors: B
authors: Hernandez
authors: Matthias
authors: M
authors: Selke