期刊
RSC ADVANCES
卷 5, 期 10, 页码 7395-7400出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra08869g
关键词
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资金
- Natural Science Foundation of Gansu Province, China [1208RJYA005]
- National Science Foundation of China [51402140, 11205235]
- National Basic Research Program of China (973 program) [2010CB934501]
Strongly fluorescent polyethylene glycol passivated nitrogen-doped carbon dots (P-NCDs) were prepared through a one-step facile hydrothermal process using glutamic acid as the precursor. The passivated nitrogen-doped carbon dots with an average size of 6.5 nm showed strong blue luminescence when excited with ultraviolet light. Excitation wavelength dependent photoluminescence was observed in the obtained P-NCDs, and the relationship between the excitation and emission wavelength could be formulated as a linear function. The P-NCDs exhibit noticeable enhancement of photoluminescence after passivation and the quantum yield was as high as 18.7%. The P-NCDs also exhibited luminescence resistance to heavy metal ions to some extent. The excellent comprehensive properties enable the P-NCDs to have potential applications in detecting the polluted environment and other bio-imaging fields.
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