Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 269, Issue -, Pages 766-774Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molliq.2018.08.101
Keywords
Nitrogen-doping; Carbon quantum dots; Fluorescence; Cell imaging; Detection of Fe3+ and cysteine; Optical thermometry
Funding
- National Natural Science Foundation of China [51663007, 21364003]
- Natural Science Foundation of Guangxi Province [2017GXNSFFA198002]
- Project of Thousand Outstanding Young Teachers' Training in Higher Education Institutions of Guangxi
Ask authors/readers for more resources
Photoluminescent nitrogen-doped carbon quantum dots (N-CQPs) hold great promise for numerous applications because of their attractive attributes. However, the development of N-CQDs with bright fluorescence and unique optical responsibility is still in its infancy. Herein we present a facile and green approach to prepare versatile N-CQDs via hydrothermal carbonization of watermelon juice. The resulted N-CQDs with high fluorescence quantum yield (10.6%) showed superior water dispersibility, stable photoluminescence, and low cytotoxicity. In addition, the N-CQDs exhibited selective and sensitive fluorescence quenching behavior towards Fe3+ ions and the limit of detection (LOD) can reach 0.16 mu M. It was also demonstrated that the N-CQDs/Fe3+ system can be employed to selectively sense cysteine (LOD = 0.27 mu M) based on the fluorescence turn on effect. Moreover, the N-CQDs also showed interesting temperature-dependent fluorescence behavior and can be utilized as a nanothermometer, as demonstrated by determining temperature in cells in this study. (C) 2018 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available