Roshni, V. and Gujar, V. and Pathan, H. and Islam, S. and Tawre, M. and Pardesi, K. and Santra, M.K. and Ottoor, D. (2019) Bioimaging Applications of Carbon dots (C. dots) and its CystamineFunctionalization for the Sensitive Detection of Cr(VI) in Aqueous Samples. Journal of Fluorescence..

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Abstract

In this study, one step hydrothermal synthetic strategy was adopted for preparing carbon dots (C. dots) from jeera (Cumin: Cuminum cyminum), a naturally abundant and cost effective carbon source. The physical, optical and surface functional properties of C. dots were extensively studied by different techniques such as Transmission electron microscopy (TEM), Scanning electron microscopy (SEM), spectrophotometry, fluorescence spectroscopy, Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The obtained C. dots were highly water dispersible and photostable with a quantum yield of 5.33%. The antioxidant property of C. dots was investigated by 2, 2-diphenyl-1-picrylhydrazyl (DPPH) assay. The C. dots were then capped with cystamine using 1-(3-dimethylaminopropyl)-3-ethyl carbodiimide (EDC) and N-Hydroxysuccinimide (NHS) coupling chemistry to design a selective sensing system for chromium (VI) (Cr (VI)). The minimum detection limit of Cr (VI) was found to be 1.57 μM. Biocompatibility and low toxicity of C. dots obtained from jeera made it a potential tool for bioimaging application. The internalisation of C. dots by MCF-7 breast cancer cells and Multi Drug Resistant (MDR) pathogens such as Staphylococcus aureus and Pseudomonas aeruginosa were proved by the bioimaging of respective cells.

Item Type:	Article
Depositing User:	Mr. Rameshwar Nema
Date Deposited:	25 Feb 2020 04:38
Last Modified:	25 Feb 2020 04:38
URI:	http://nccs.sciencecentral.in/id/eprint/773

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