FOERSTER RESONANCE ENERGY TRANSFER UNDERONE- AND TWO-PHOTON EXCITATION IN NANO-BIO HYBRID COMPLEXES FORMING FROM QUANTUM DOTS AND BACTERIORHODOPSIN

摘要

We demonstrate here the one-photon- and two-photon-induced Forster resonance energy transfer (FRET) from CdSe/ZnS quantum dots (QDs) to bacteriorhodopsin (bR) in QD-bR hybrid material. The two-photon absorption cross section of QDs was about two orders of magnitude larger than that of bR. Therefore, the highly selective two-photon excitation of QDs in QD-bR complexes is possible. The efficiency of FRET from QDs to bR is sufficient to initiate bR photoconversion through selective two-photon excitation of QDs.