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Issue 14, 2018
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Evidence of homo-FRET in quantum dot–dye heterostructured assembly

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Abstract

With an aim to understand the intermolecular/particle interaction and the optical properties of the inorganic–organic hybrid nanostructured materials, Förster resonance energy transfer (FRET) between negatively charged CdS quantum dots (donor) and positively charged Oxazine 170 perchlorate (acceptor) has been investigated by employing steady-state and time-resolved fluorescence spectroscopy. Investigations revealed that size-dependent changes in the FRET efficiency of different QD–dye FRET pairs occurred mainly due to the electrostatic effects. Interestingly, the present study also reveals that at a higher concentration of dye molecules, aggregation occurs on the QD surface and the quenching of dye fluorescence occurs due to homo-FRET process. The homo-FRET process in this case has been established by exploiting steady-state fluorescence anisotropy measurements. The feasibility of aggregate formation and the homo-FRET interaction between the dye molecules has also been demonstrated through quantum mechanical calculations.

Graphical abstract: Evidence of homo-FRET in quantum dot–dye heterostructured assembly

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Publication details

The article was received on 13 Sep 2017, accepted on 08 Mar 2018 and first published on 08 Mar 2018


Article type: Paper
DOI: 10.1039/C7CP07233C
Citation: Phys. Chem. Chem. Phys., 2018,20, 9523-9535
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    Evidence of homo-FRET in quantum dot–dye heterostructured assembly

    S. Saha, D. Majhi, K. Bhattacharyya, N. Preeyanka, A. Datta and M. Sarkar, Phys. Chem. Chem. Phys., 2018, 20, 9523
    DOI: 10.1039/C7CP07233C

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