L-cysteine functionalized gold nanoparticles for the colorimetric detection of Hg2+ induced by ultraviolet light
L-cysteine functionalized gold nanoparticles for the colorimetric detection of Hg2+ induced by ultraviolet light
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DOI：
10.1088/0957-4484/21/2/025501
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发表时间：
2010-01-15
期刊：
影响因子：
3.5
通讯作者：
Su, Zhongmin
中科院分区：
文献类型：
--
作者：
Chai, Fang;Wang, Chungang;Su, Zhongmin
利用L-半胱氨酸修饰的金纳米粒子，在紫外光照射下，制备了一种简单、高效、快速、灵敏的汞离子比色传感器。同时考察了检测的灵敏度和选择性。在Hg ~（2+）存在下，L-半胱氨酸修饰的金纳米粒子可以被诱导快速聚集，特别是在紫外光的辅助下。Hg 2+的存在可以通过金纳米颗粒的比色响应来监测。通过紫外-可见光谱的测定，实现了对Hg ~（2+）的检测，检测限为100 nM。用其它二价金属离子考察了该方法的选择性。该传感器可用于现场实时检测汞离子。
A simple, cost-effective yet rapid and sensitive colorimetric sensor for the detection of Hg2+ using L-cysteine functionalized gold nanoparticles induced by ultraviolet radiation was developed. The sensitivity and selectivity of detection was also investigated. The L-cysteine modified gold nanoparticles can be induced to aggregate quickly in the presence of Hg2+, especially with the assistance of ultraviolet radiation. The presence of Hg2+ can be monitored by the colorimetric response of gold nanoparticles. The detection of Hg2+ could be realized, after measuring the UV-vis spectra, with a detection limit of 100 nM. The selectivity of this method has been investigated by other divalent metal ions. The effective colorimetric sensor can be used for on-site and real-time Hg2+ detection.