Label-free detection of Pb2+ based on aggregation-induced emission enhancement of Au-nanoclusters
Label-free detection of Pb2+ based on aggregation-induced emission enhancement of Au-nanoclusters
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基于金纳米簇聚集诱导发射增强的 Pb2 无标记检测
DOI：
10.1039/c5ra03449c
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发表时间：
2015-01-01
期刊：
影响因子：
3.9
通讯作者：
Pei, Renjun
中科院分区：
文献类型：
--
作者：
Ji, Liya;Guo, Yahui;Pei, Renjun
有趣的是，本文提出的谷胱甘肽覆盖的au纳米团簇，与尺寸较大的同源aunp相比，具有独特的光学性能。由于聚集体的形成，aunc的发光强度增强。基于AuNCs的聚集诱导发射增强（AIEE）特性，将AuNCs用作Pb2+检测的视觉探针。当发光谷胱甘肽覆盖的AuNCs探针遇到Pb2+离子时，它们在1分钟内通过GSH-Pb2+相互作用迅速形成聚集体，导致发光强度增强。增强的发光强度与Pb2+浓度呈线性关系，对12种二价金属离子具有良好的选择性。更重要的是，该探针还可以用于现场测试，通过使用便携式紫外手电筒检查Pb2+污染。
Interestingly, the glutathione capped Au-nanoclusters presented here showed a unique optical performance compared with their homological AuNPs with larger size. The luminescence intensity of the AuNCs could be enhanced due to the formation of aggregates. The AuNCs were then employed as a visual probe for the detection of Pb2+ based on the aggregation-induced emission enhancement (AIEE) property of the AuNCs. When the luminous glutathione capped AuNCs probes encountered Pb2+ ions, they rapidly formed aggregates through GSH-Pb2+ interaction in 1 minute, resulting in an enhanced luminescence intensity. The enhanced luminescence intensities showed a linear dependence on the concentrations of Pb2+ with satisfactory selectivity towards 12 kinds of divalent metal ions. More importantly, the probe can also be used for on-site testing to inspect Pb2+ contamination by using a portable UV flashlight.