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In Situ Manipulation of Fluorescence Resonance Energy Transfer between Quantum Dots and Monolayer Graphene Oxide by Laser Irradiation

Abstract

The unique optical properties of solution-processable colloidal semiconductor quantum dots (QDs) highlight promising applications in the next generation of optoelectronic and biomedical technologies. In order to optimize these applications, the tunability of QDs’ optical properties are always highly desired. Although the tuning during synthesis stages has been intensively investigated, the in situ altering after devices fabrication is still limited. Here we report the optical properties tuning of CdSeTe/ZnS QDs through an in situ manipulation of fluorescence resonance energy transfer (FRET) between QDs and monolayer graphene oxide (GO). By increasing the acceptor’s absorption ability of GO through laser irradiation, the efficiency of FRET between QDs and GO has been substantially improved from 29.7% to 70.0%. The corresponding energy transfer rate is enhanced by 5.5 times. These results can be well explored by spectral overlap between the fluorescence emission of QDs and the absorption of original or reduced GO. Our scheme, with features of in situ manipulation, high spatial resolution and wireless steering, enables the potential functionality of such hybrid structures in optoelectronic applications.

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Publication details

The article was received on 27 Sep 2018, accepted on 06 Dec 2018 and first published on 06 Dec 2018


Article type: Paper
DOI: 10.1039/C8NR07858K
Citation: Nanoscale, 2018, Accepted Manuscript
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    In Situ Manipulation of Fluorescence Resonance Energy Transfer between Quantum Dots and Monolayer Graphene Oxide by Laser Irradiation

    W. He, C. Qin, Z. Qiao, Y. Gong, X. Zhang, G. Zhang, R. Chen, Y. Gao, L. Xiao and S. Jia, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR07858K

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