Web Release Date: February 15,
Semiconductor Quantum Dots as Two-Photon Sensitizers
Center for Chemical Dynamics and Nanomaterials Research, Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106
Received October 24, 2007
Abstract:
This study presents the potential of quantum dots as two-photon sensitizers for attached energy acceptors. With two-photon absorption cross sections, which are orders of magnitudes higher than those of any molecule, quantum dots constitute outstanding NIR sensitizers. The successful energy transfer to conjugated phthalocyanines was demonstrated using two-photon excitation of the quantum dots with a 1100 nm wavelength and was monitored with femtosecond time-resolved pump-probe spectroscopy.
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