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Photoluminescence enhancement via microwave irradiation of carbon quantum dots derived from solvothermal synthesis of L-arginine

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Abstract

Photoluminescence enhancement of carbon quantum dots was achieved via solvothermal synthesis followed by microwave irradiation. Nitrogen and phosphorous doped carbon quantum dots were prepared by solvothermal heating of L-arginine with phosphoric acid for 12 hours followed by microwave irradiation for 3 minutes. The photoluminescence enhancement was nearly two fold after microwave irradiation. The morphology, structure, and surface properties were the same for the solvothermal (CQDs-S) as well as after microwave (CQDs-M) irradiation. Thus, the enhancement is attributed to the decrease of surface defects within CQDs, which led to a decrease in the non-radiative transitions. The CQDs were quenched selectively by Fe3+ ions. The quenching led to the fabrication of the fluorescence probe for ferric ion determination. The CQDs-M had a low detection limit of 4.0 nM, while CQDs-S had a limit of 50 nM. This study gives a tool for enhancing photoluminescence quantum yields, which is highly desired for biosensing and bioimaging applications.

Graphical abstract: Photoluminescence enhancement via microwave irradiation of carbon quantum dots derived from solvothermal synthesis of l-arginine

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Publication details

The article was received on 20 Sep 2018, accepted on 19 Nov 2018 and first published on 23 Nov 2018


Article type: Paper
DOI: 10.1039/C8NJ04788J
Citation: New J. Chem., 2019, Advance Article
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    Photoluminescence enhancement via microwave irradiation of carbon quantum dots derived from solvothermal synthesis of L-arginine

    K. M. Omer, K. H. Hama Aziz, Y. M. Salih, D. I. Tofiq and A. Q. Hassan, New J. Chem., 2019, Advance Article , DOI: 10.1039/C8NJ04788J

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