Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 252, Issue -, Pages 894-900Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.06.088
Keywords
Carbon dot; Banana plant; Cytotoxicity; Fluorescence imaging
Funding
- Department of Science and Technology (DST), India
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Carbon dots (CDs) with 48% quantum yield (QY) were synthesized by simple hydrothermal treatment using Pseudo-stem of banana plant as carbon source. As synthesized CDs were characterized using UV-vis, fluorescence, dynamic light scattering (DLS), Fourier transform infrared (FT-IR), Raman, X-ray photoelectron spectroscopy (XPS) and High resolution transmission electron microscopic (HRTEM) techniques. A fluorescent nanosensor which exhibits highly specific recognition capability towards Fe3+ over other competing metal ions has been reported. CD exhibits fluorescent turn-off' sensing nature with high selectivity towards Fe3+ with a detection limit as low as 6.4 nM and turn-on property towards S2O32- anion. The biocompatibility of CDs was revealed from the cytotoxicity studies on cancerous cells (HeLa, MCF-7 (Michigan Cancer Foundation-7)) and was employed as fluorescent probes for multi-coloured (blue, green and red) imaging of HeLa and MCF-7 cells. Due to the bright fluorescence, water solubility, high photo-stability, low toxicity, cell-membrane permeability and good biocompatibility, as-prepared carbon nanodots are demonstrated to be excellent probe as bio-imaging agent. (C) 2017 Elsevier B.V. All rights reserved.
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