Highly fluorescent nitrogen-doped graphene quantum dots (N-GQDs) as an efficient nanoprobe for imaging of microbial cells

Highly fluorescent nitrogen-doped graphene quantum dots (N-GQDs) as an efficient nanoprobe for imaging of microbial cells

Carbon, being a material of the era, has vast usefulness in the synthesis of many novel compounds. One of them is graphene quantum dots (GQDs) have drawn a great deal of attention to the scientific community owing to their low cytotoxicity, higher optical stability, and tremendous photoluminescence...

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Bibliographic Details
Published in:Fullerenes, nanotubes, and carbon nanostructures Vol. 29; no. 8; pp. 588 - 595
Main Authors: Jain, Roma, Vithalani, Ravi, Patel, Dikin, Lad, Urvi, Modi, Chetan K., Suthar, Devesh, Solanki, Jaydip D., Surati, Kiran R.
Format: Journal Article
Language:English
Published: Taylor & Francis 03-08-2021
Subjects:
bio-imaging
E. coli
N-GQDs
photoluminescence
Saccharomyces cescerevisiae yeast
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Summary:Carbon, being a material of the era, has vast usefulness in the synthesis of many novel compounds. One of them is graphene quantum dots (GQDs) have drawn a great deal of attention to the scientific community owing to their low cytotoxicity, higher optical stability, and tremendous photoluminescence (PL) property, which show a new insight in the field of bio-sensing and bio-imaging. Herein, we have demonstrated a facile method to synthesise N-doped GQDs from graphene oxide (GO) using solvothermal treatment with aprotic solvent. GO was synthesised using a modified Hummers' method. The as-prepared N-GQDs showed stronger green emission with 326 nm wavelength. PL study showed that PL characteristics of as-synthesised N-GQDs are mainly due to the surface π→π* and n→π* transitions of N containing functional groups with skeletal carbons of the graphene oxide sheet. The N-GQDs were also examined for bio-imaging of microbial cells including E. coli and Saccharomyces cescerevisiae yeast. The results (blue and green emissions under a fluorescence microscope) of this study showed biocompatibility and the photostability of N-GQDs for their application in the fields ranging from energy to biomedicine.
ISSN:1536-383X
1536-4046
DOI:10.1080/1536383X.2021.1872548