材料科学
生物相容性
检出限
荧光
量子产额
光致发光
发光
选择性
纳米材料
分析化学(期刊)
离子
核化学
光化学
纳米技术
光电子学
色谱法
有机化学
化学
光学
物理
催化作用
冶金
作者
Wen Liu,Rong Zhang,Yu Kang,Xiaoxin Zhang,Hao-jiang Wang,LI Li-hong,Hongwei Diao,Wenlong Wei
标识
DOI:10.1016/s1872-5805(19)30024-1
摘要
Water-soluble luminescent nitrogen-doped CDs (N-CDs) having a high QY of 29.83% were prepared by a one-step microwave-assisted pyrolysis method using ammonium citrate and triethylenetetramine as the precursors. The microstructure, optical properties and biocompatibility of the N-CDs were investigated. Results indicate that they exhibit a strong fluorescence, favorable biocompatibility and excellent optical stability. Their photoluminescence is quenched by Cu2+ ions through the formation of a complex between the N-CDs and Cu2+, which can be used for Cu2+ detection. Compared with other CD-based nanomaterials, the N-CDs show outstanding optical properties, and excellent selectivity and sensitivity for Cu2+ detection with a linear range of 0.01-11 μM and a detection limit of 4.5 nM. The selectivity for Cu2+ detection is so good that the N-CDs have been successfully used in Cu2+ detection for real water samples. They have also been used to draw fluorescent patterns and image living cells.
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