D-Penicillamine and bovine serum albumin co-stabilized copper nanoclusters with remarkably enhanced fluorescence intensity and photostability for ultrasensitive detection of Ag+

被引:25
|
作者
Li Ruiyi [1 ]
Wang Huiying [1 ]
Zhou Xiaoyan [1 ]
Liao Xiaoqing [1 ]
Sun Xiulan [2 ]
Li Zaijun [1 ,3 ]
机构
[1] Jiangnan Univ, Sch Chem & Mat Engn, Wuxi 214122, Peoples R China
[2] Jiangnan Univ, Sch Food Sci & Technol, Wuxi 214122, Peoples R China
[3] Minist Educ, Key Lab Food Colloids & Biotechnol, Wuxi 214122, Peoples R China
基金
中国国家自然科学基金;
关键词
GOLD NANOCLUSTERS; GREEN SYNTHESIS; SCATTERING; SILVER(I); OXIDE; IONS; NANOPARTICLES; MERCURY(II); BIOSENSOR; PROBE;
D O I
10.1039/c5nj02615f
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Copper nanoclusters (CuNCs) have become promising nanomaterials due to their excellent electronic conductivity and biocompatibility. In this study, we reported a facile synthesis of D-penicillamine and bovine serum albumin co-stabilized copper nanoclusters (BSA/DPA-CuNCs) and the use as optical probe for the detection of Ag+. Herein, Cu2+ was reduced into Cu-0 by D-penicillamine, further leading to form DPA-CuNCs. Then, BSA was introduced into DPA-CuNCs to obtain BSA/DPA-CuNCs by their electrostatic attraction. The as-prepared BSA/DPA-CuNCs exhibit remarkably enhanced fluorescence intensity and photostability. The peak fluorescence intensity is more than 2-fold that of DPA-CuNCs. Due to the synergistic effect between DPA and BSA, the nanosensor based on BSA/DPA-CuNCs gives ultrasensitive fluorescence response towards Ag+. Its peak fluorescence intensity linearly decreases with the increase of Ag+ concentration in the range of 1.0 x 10(-8) to 1.0 x 10(-16) M with the detection limit of 4.3 x 10(-17) M (S/N = 3). The method provides the advantage of sensitivity, repeatability and stability. It has been successfully applied in the detection of Ag+ in water samples. The study also opens a new avenue for the fabrication of functional metal nanoclusters that hold great promise in potential applications such as nanosensors, biocatalysts and molecular carriers.
引用
收藏
页码:732 / 739
页数:8
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