Activation of porphyrin photosensitizers by semiconductor quantum dots via two-photon excitation

Autor:	Weisi Song, Yinghui Wang, Li-min An, Yanqiang Yang, Ya-nan Wen, Yuqiang Liu
Rok vydání:	2009
Předmět:	Photon Physics and Astronomy (miscellaneous) Chemistry business.industry Exciton Physics::Optics Molecular physics Photoexcitation Condensed Matter::Materials Science Two-photon excitation microscopy Quantum dot Femtosecond Optoelectronics Time-resolved spectroscopy business Excitation
Zdroj:	Applied Physics Letters. 95:143702
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.3243979
Popis:	Energy transfer from water-soluble quantum dots (QDs) to porphyrinlike sensitizers is studied by time-resolved spectroscopy of two-photon excitation with femtosecond laser pulses. Evident transfer results are observed. Electron exchange is found to be the dominant transfer mechanism. Relative intensity change between excitonic and trapping emission implies that nonradiative energy transfer occurs through the trapping state of QDs, which presents a way of raising energy transfer efficiency in this type of donor-acceptor pairs. This study underlines the potential of QD-porphyrin model system for applications in two-photon excitation photodynamic therapy.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2c2d4b8892a86033ce6aa559f28da8d4 https://doi.org/10.1063/1.3243979 Zobrazit plný text záznamu