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Khalid MA, Mubeen M, Mukhtar M, Siddique Z, Sumreen P, Aydın F, Asil D, Iqbal A. Probing the Förster Resonance Energy Transfer Dynamics in Colloidal Donor-Acceptor Quantum Dots Assemblies. J Fluoresc 2023; 33:2523-2529. [PMID: 37314535 DOI: 10.1007/s10895-023-03301-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 06/05/2023] [Indexed: 06/15/2023]
Abstract
In this article, we report the synthesis of graphene quantum dots (GQDs) by hydrothermal method and surface modified CdS quantum dots (QDs) via the colloidal method and the fabrication of their dyad. The CdS QDs functionalized by mercaptoacetic acid (MAA) attach to the GQDs via electrostatic interactions. Spectral overlapping between the emission spectrum of GQDs and the absorption spectrum of CdS QDs allows efficient Förster resonance energy transfer (FRET) from GQDs to the CdS QDs in the GQDs-CdS QDs dyads. The magnitude of FRET efficiency (E) and the rate of energy transfer (kE) assessed by the photoluminescence (PL) decay kinetics are ~61.84% and ⁓3.8 × 108 s- 1, respectively. These high values of FRET efficiency and energy transfer rate can be assigned to the existence of strong electrostatic interactions between GQDs and CdS QDs, which arise due to the presence of polar functionalities on the surface of both GQDs and CdS QDs. The understanding of energy transfer in the luminescent donor-acceptor FRET system is of significant importance and the practical implications of such FRET systems could overall improve the efficiency of photovoltaics, sensing, imaging and optoelectronic devices.
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Affiliation(s)
- Muhammad Adnan Khalid
- Department of Chemistry, Quaid-I-Azam University, 45320, Islamabad, Pakistan
- Department of Chemistry, Middle East Technical University, Ankara, 06800, Turkey
| | - Muhammad Mubeen
- Department of Chemistry, Quaid-I-Azam University, 45320, Islamabad, Pakistan
| | - Maria Mukhtar
- Department of Chemistry, Quaid-I-Azam University, 45320, Islamabad, Pakistan
| | - Zumaira Siddique
- Department of Chemistry, Quaid-I-Azam University, 45320, Islamabad, Pakistan
| | - Poshmal Sumreen
- Department of Chemistry, Quaid-I-Azam University, 45320, Islamabad, Pakistan
| | - Firdevs Aydın
- Department of Chemistry, Middle East Technical University, Ankara, 06800, Turkey
| | - Demet Asil
- Department of Chemistry, Middle East Technical University, Ankara, 06800, Turkey
| | - Azhar Iqbal
- Department of Chemistry, Quaid-I-Azam University, 45320, Islamabad, Pakistan.
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