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Published in: Journal of Materials Science 4/2022

03-01-2022 | Materials for life sciences

Preparation of turmeric-derived sulfur-functionalized carbon dots: antibacterial and antioxidant activity

Authors: Swarup Roy, Parya Ezati, Jong-Whan Rhim, Rahim Molaei

Published in: Journal of Materials Science | Issue 4/2022

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Abstract

The work describes the preparation of carbon dots using turmeric as the carbon source and their functionalization with sulfur to enhance the functionality. The turmeric-derived carbon dots (CD) and sulfur-functionalized carbon dots (S-CD) were fabricated by a hydrothermal method. The prepared CD was in size range of 10 nm as confirmed by FETEM, and the sulfur functionalization of the CD was verified by FTIR and XPS tests. The CD showed a clear color change from yellowish-brown to green under UV light and exhibited tunable photoluminescence properties. Both CD and S-CD showed strong antioxidant activity in DPPH and ABTS assays. In addition, the S-CD exhibited potent antibacterial activity against E. coli and L. monocytogenes. The sulfur-functionalized CD produced more reactive oxygen than the non-functionalized CD, confirming the stronger antibacterial activity of S-CD. Additionally, the cytotoxicity of the CD was checked against fibroblast L929 cells, and results showed over 80% of viable cells at 1000 μg/mL for 72 h, indicating the low cytotoxicity. Therefore, multifunctional CD materials made from turmeric can be safely used for biomedical and food packaging applications.

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Appendix
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Metadata
Title
Preparation of turmeric-derived sulfur-functionalized carbon dots: antibacterial and antioxidant activity
Authors
Swarup Roy
Parya Ezati
Jong-Whan Rhim
Rahim Molaei
Publication date
03-01-2022
Publisher
Springer US
Published in
Journal of Materials Science / Issue 4/2022
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-021-06804-2

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