Colorimetric Nitrite and Nitrate Detection with Gold Nanoparticle Probes and Kinetic End Points
Colorimetric Nitrite and Nitrate Detection with Gold Nanoparticle Probes and Kinetic End Points
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DOI：
10.1021/ja901609k
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发表时间：
2009-05-13
影响因子：
15
通讯作者：
Mirkin, Chad A.
中科院分区：
文献类型：
--
作者：
Daniel, Weston L.;Han, Min Su;Mirkin, Chad A.
我们报道了一种基于用格里斯反应试剂功能化的金纳米粒子探针的新型比色亚硝酸盐和硝酸盐离子检测方法的开发。这种检测方法利用了金纳米粒子的距离相关等离子体特性以及亚硝酸盐离子促进用苯胺和萘部分修饰的新型纳米粒子探针交叉偶联的能力。该检测基于动力学终点的概念，并且可以在饮用水中该离子的美国环境保护局（EPA）限值（以红色突出显示，微摩尔）下被触发。这种快速且简单的检测方法可能对现场水质监测有用。
We report the development of a novel colorimetric nitrite and nitrate ion assay based upon gold nanoparticle probes functionalized with Griess reaction reagents. This assay takes advantage of the distance-dependent plasmonic properties of the gold nanoparticles and the ability of nitrite ion to facilitate the cross coupling of novel nanoparticle probes modified with aniline and naphthalene moieties. The assay works on the concept of a kinetic end point and can be triggered at the EPA limit for this ion in drinking water (highlighted in red, mu M). This rapid and simple assay could be useful for on-site water quality monitoring.