Förster resonance energy transfer between α-Bi2O3 nanorods and rhodamine 6G in aqueous media for turn-off glucose-sensing application

Abstract

The present study deals with the Förster resonance energy transfer (FRET) process that takes place between α-Bi2O3 nanorods (BN), which function as a donor, and Rhodamine 6G, which (R6G) functions as an acceptor. Fluorescence of R6G situated at 550 nm is found to be enhanced due to this FRET behaviour with the increase of the number of acceptor concentrations. Apart from this, the rate of energy transfer also increased. It is found that a decrease in the donor–acceptor distance is assisting FRET. Steady state and time-resolved fluorescence studies are performed in two different excitation wavelengths and it shows the possible FRET behaviour where the average lifetime increases with the increase of acceptor concentrations. This pair is used to sense the glucose in nM concentrations.