Abstract
We report on Förester resonance nergy transfer (FRET) within a bioconjugated system composed of cadmium sulfide (CdS) quantum dots (QDs) and transport protein bovine serum albumin (BSA). The optical properties of these two elements of the bioconjugate were exploited to produce FRET in the ultraviolet (UV) region with a maximum efficiency of 22% from BSA donors to QD acceptors. In contrast to previous studies, which were limited to FRET in the visible light, we used 2.6 nm CdS QDs because they emit light with a shorter wavelength (∼370 nm) that facilitates the UV-FRET process. UV-FRET was controlled by tuning the spectral overlap between BSA and CdS QDs.
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