Microwave-Assisted Green Synthesis of Carbon Quantum Dots Derived from Calotropis Gigantea as a Fluorescent Probe for Bioimaging

An eco-friendly, cost-effective, and convenient approach for synthesizing biocompatible fluorescent carbon quantum dots (CQDs) from the leaf extract of the medicinal plant Calotropis gigantea , commonly known as crown flower, has been demonstrated in this work. Fluorescence quantum yields of up to 4...

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Bibliographic Details
Published inJournal of fluorescence Vol. 32; no. 3; pp. 1039 - 1049
Main Authors Sharma, Neetu, Sharma, Indu, Bera, Milan Kumar
Format Journal Article
LanguageEnglish
Published New York Springer US 01.05.2022
Springer Nature B.V
Subjects
Analytical Chemistry
Biochemistry
Biocompatibility
Biological and Medical Physics
Biomedical and Life Sciences
Biomedicine
Biophysics
Biotechnology
Calotropis
Carbon
Fluorescent Dyes
Fluorescent indicators
Herbal medicine
Medical imaging
Microwaves
NMR
Nuclear magnetic resonance
Original Article
Quantum Dots
Size distribution
Staining
Surface stability
Synthesis
Zeta potential
Fluorescent
Bioimaging
Green synthesis
Carbon quantum dots
Fluorescent staining
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Summary:An eco-friendly, cost-effective, and convenient approach for synthesizing biocompatible fluorescent carbon quantum dots (CQDs) from the leaf extract of the medicinal plant Calotropis gigantea , commonly known as crown flower, has been demonstrated in this work. Fluorescence quantum yields of up to 4.24 percent were observed in as-synthesized CQDs. The size distribution of the as-synthesized CQDs varied from 2.7 to 10.4 nm, with a significant proportion of sp 2 and sp 3 carbon groups verified by nuclear magnetic resonance analysis. The zeta potential of as-synthesized CQDs was measured to be –13.8 mV, indicating the existence of a negatively charged surface with incipient instability in aqueous suspension. Furthermore, as an alternative to organic or synthetic dyes, the development of simple, inexpensive, and non-destructive fluorescence-based staining agents are highly desired. In this regard, as-synthesized CQDs have shown remarkable fluorescent staining capabilities in this work and might be utilised as a suitable probe for optical and bio-imaging of bacteria, fungi, and plant cells.
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ISSN:1053-0509
1573-4994
1573-4994
DOI:10.1007/s10895-022-02923-4