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Imaging of Bacterial and Fungal Cells Using Fluorescent Carbon Dots Prepared from Carica papaya Juice

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Abstract

In this paper, we have described a simple hydrothermal method for preparation of fluorescent carbon dots (C-dots) using Carica papaya juice as a precursor. The synthesized C-dots show emission peak at 461 nm with a quantum yield of 7.0 %. The biocompatible nature of C-dots was confirmed by a cytotoxicity assay on E. coli. The C-dots were used as fluorescent probes for imaging of bacterial (Bacillus subtilis) and fungal (Aspergillus aculeatus) cells and emitted green and red colors under different excitation wavelengths, which indicates that the C-dots can be used as a promising material for cell imaging.

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Acknowledgments

This work was financially supported by the S. V. National Institute of Technology, Surat under M.Sc., research project. We also thank Department of Science and Technology for providing Maya Pro 2000 spectrophotometer under the Fast-Track Young Scientist Scheme (2011 – 2014).

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Correspondence to Suresh Kumar Kailasa.

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Betha Saineelima B. Kasibabu and Stephanie L. D’souza contributed equally to this work.

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Kasibabu, B.S.B., D’souza, S.L., Jha, S. et al. Imaging of Bacterial and Fungal Cells Using Fluorescent Carbon Dots Prepared from Carica papaya Juice. J Fluoresc 25, 803–810 (2015). https://doi.org/10.1007/s10895-015-1595-0

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  • DOI: https://doi.org/10.1007/s10895-015-1595-0

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