期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 17, 页码 10717-10725出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b01325
关键词
nitrogen; phosphorus; doped carbon nanodots; cell imaging; Fe3+ detection
资金
- Natural Science Foundation of China [21405025, 21575031]
- Natural Science Foundations of Guangxi Province [2014GXNSFBA118047, 2015GXNSFDA139006]
- Guangxi Pharmaceutical Industry Talent Highland Project [1417]
- [IRT1225]
- [CMEMR2013-A12]
Chemical doping with heteroatoms can effectively modulate physicochemical and photochemical properties of carbon dots (CDs). However, the development of multi heteroatoms codoped carbon nanodots is still in its early stage. In this work, a facile hydrothermal Synthesis strategy was applied to synthesize multi heteroatoms (nitrogen and phosphorus) codoped carbon nanodots (N,P-CDs) using glucose as carbon source, and ammonia, phosphoric acid as dopant, respectively. Compared with CDs, the multi heteroatoms doped CDs resulted in dramatic improvement in the electronic characteristics and surface chemical activities. Therefore, the N,P-CDs prepared as described above exhibited a strong blue emission and a sensitive response to Fe3+. The N,P-CDs based fluorescent sensor was then applied to sensitively determine Fe3+ with a detection limit of 1.8 nM. Notably, the prepared N,P-CDs possessed negligible cytotoxicity, excellent biocompatibility, and high photostability. It was also applied for label-free detection of Fe3+ in complex biological samples and the fluorescence imaging of intracellular Fe3+, which indicated its potential applications in clinical diagnosis and other biologically related study.
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