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Issue 33, 2015
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Green preparation of fluorescent carbon dots from lychee seeds and their application for the selective detection of methylene blue and imaging in living cells

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Abstract

A green approach was developed for the preparation of fluorescent carbon dots (CDs) by using lychee seeds as precursors. The preparation of CDs was performed by simple pyrolysis. The quantum yield of as-prepared CDs was 10.6% by using quinine sulfate as the reference. The CDs were employed as fluorescence probes for the detection of methylene blue (MB). This sensing system exhibits excellent sensitivity and selectivity toward MB, and a detection limit of 50 mM is achieved. The possible application of as-prepared CDs for imaging in living cells was also explored. The inherent cytotoxicity of CDs was evaluated using HepG2 cell, and the cell viabilities were estimated to be greater than 90% upon addition of the CDs over a wide concentration range of 0–1000 μg mL−1. It was then successfully applied for the fluorescence imaging of HepG2 cells.

Graphical abstract: Green preparation of fluorescent carbon dots from lychee seeds and their application for the selective detection of methylene blue and imaging in living cells

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Publication details

The article was received on 04 Jun 2015, accepted on 19 Jul 2015 and first published on 20 Jul 2015


Article type: Paper
DOI: 10.1039/C5TB01073J
Citation: J. Mater. Chem. B, 2015,3, 6783-6789
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    Green preparation of fluorescent carbon dots from lychee seeds and their application for the selective detection of methylene blue and imaging in living cells

    M. Xue, M. Zou, J. Zhao, Z. Zhan and S. Zhao, J. Mater. Chem. B, 2015, 3, 6783
    DOI: 10.1039/C5TB01073J

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