Study of energy transfer mechanism from CdS quantum dots to Rhodamine 101 in reverse micelle medium

• Published in: Synthetic metals 2018-11, Vol.245, p.260-266
• Main Authors: Bozkurt, Ebru, Onganer, Yavuz
• Format: Article
• Language: English
• Subjects: Cadmium sulfide; Chemical compounds; Energy; Energy transfer; Fluorescence; Fluorescence resonance energy transfer (FRET); Mathematical analysis; Molecules; Quantum dots; Quenching; Reverse micelle; Reverse micelles; Rhodamine; Rhodamine-101; Surfactants
• ISSN: 0379-6779; 1879-3290
• DOI: 10.1016/j.synthmet.2018.09.006

[Display omitted] •CdS QDs are synthesized by using reverse micelle method.•FRET between CdS Quantum Dots (QDs) and Rhodamine 101 is observed in reverse micelles.•KSV and kq values are calculated by using Stern-Volmer approach.•QD-Rh101 pairs can be used in research areas such as FRET-based nanosensors and light harvesting devices. In this study, fluorescence resonance energy transfer (FRET) between CdS quantum dots (QDs) and Rhodamine 101 was investigated in reverse micelles. CdS QDs as donor were synthesized by using reverse micelle method. The particle sizes of CdS QDs were found as 1.18 ± 0.05 for QD1 and 2.11 ± 0.25 nm for QD2 with TEM measurements. It was determined that the fluorescence intensity of the QDs quenched as the concentration of Rh101 increased. The effect of the concentration of dye on the quenching of the fluorescence intensity of QDs was evaluated by the Stern-Volmer approach and KSV and kq values were calculated. It was observed that the quenching was not diffusion controlled. The FRET parameters were also calculated by using fluorescence spectroscopy. The distances between donor-acceptor (r) were also calculated as 4.74 nm for QD1 and 2.26 nm for QD2. The steady-state transfer efficiencies were calculated as 0.24 and 0.53 for QD1 and QD2, respectively. The time-resolved transfer efficiencies were also determined as 0.11 for QD1 and 0.48 for QD2. The results demonstrated that the novel donor-acceptor pairs may play an important role in the applications of many research areas such as FRET-based nanosensors and light harvesting devices.