Journal
MATERIALS LETTERS
Volume 216, Issue -, Pages 84-87Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2018.01.002
Keywords
Carbon materials; Luminescence; Carbon dots; Double emission; Cell imaging
Funding
- National Natural Science Foundation of China [21576071, 21776061, U1504215]
- State Key Laboratory of Fine Chemicals [KF1514]
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High photoluminescent (PL) nitrogen-doped carbon dots (N-CDs) have been synthesized using ferric ammonium citrate (FAC) and urea as raw materials by simple one-pot hydrothermal process. The N-CDs possess bright blue fluorescence (centred at 450 nm; 36.2% quantum yield) and green fluorescence (centred at 530 nm; 47.6% quantum yield) only by adjusting the excitation wavelength from 310 nm to 510 nm. The N-CDs exhibited high N content of 32.81 wt%, low cytotoxicity, and good PL stability at different pH values, ion strengths and temperature, respectively. As-prepared N-CDs were explored for cell imaging with great biocompatibility. The remarkable properties of N-CDs indicated their potential toward sensing and biological applications. (C) 2018 Elsevier B.V. All rights reserved.
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