使用L-半胱氨酸功能化金纳米粒子对铜离子进行快速比色检测。
Fast colorimetric detection of copper ions using L-cysteine functionalized gold nanoparticles.
作者信息
Yang Wenrong, Gooding J Justin, He Zhicong, Li Qiong, Chen Guonan
机构信息
School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia.
出版信息
J Nanosci Nanotechnol. 2007 Feb;7(2):712-6.
This communication reports an efficient visual detection method of Cu2+ by L-cysteine functionalized gold nanoparticles in aqueous solution. Upon exposure to Cu2+, the gold nanoparticle solution changed from red to blue, in response to surface plasmon absorption of dispersed and aggregated nanoparticles. This colorimetric sensor allows a rapid quantitative assay of Cu2+ down to the concentration range of 10(-5) M. Recognition of Cu2+ and formation of the aggregates are proposed to occur via a 2 : 1 sandwich complex between L-cysteine and Cu2+.
本通讯报道了一种在水溶液中利用L-半胱氨酸功能化金纳米粒子对Cu2+进行高效视觉检测的方法。当暴露于Cu2+时，金纳米粒子溶液会从红色变为蓝色，这是由于分散和聚集的纳米粒子的表面等离子体吸收所致。这种比色传感器能够对低至10(-5) M浓度范围的Cu2+进行快速定量测定。据推测，Cu2+的识别以及聚集体的形成是通过L-半胱氨酸与Cu2+之间形成2:1夹心配合物实现的。
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