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Silver nanoparticles as highly efficient and selective optical probe for sulphide via dendrimer formation in aqueous medium

机译：银纳米粒子作为硫化物的高效和选择性光学探针通过水介质中的树枝状聚合物形成

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We herein report a highly efficient, cost effective, convenient as well as selective colorimetric probe for sulphide (S ~(2?) ) in the form of silver nanoparticles (AgNPs) capped by an azonaphthol viz. 1-[(4-nitrophenyl)azo]-2-naphthol. A naked eye color change from bright yellow to colorless was observed upon the addition of S ~(2?) to the AgNPs. A remarkable feature of this probe is the unique morphological transition of spherical AgNPs to dendritic architecture induced by S ~(2?) . Although dendritic AgNPs have been reported previously also by many workers through various methods. Here we are presenting a probe that not only selectively recognises S ~(2?) colorimetrically but at the same time paves the way for the self-assembled dendritic structure of AgNPs. The lowest detection limit for S ~(2?) was found to be 67 nM which is much lower than the maximum endurable level (15 μM) of S ~(2?) in drinking water by World Health Organisation (WHO).
机译：我们在本文中报告了一种高效，成本效益，方便的和选择性比色探针，用于硫化银纳米粒子（AgNP）的形式，由亚苯甲酸甲基醇叠加。 1 - [（4-硝基苯基）AZO] -2-萘酚。在AgNP中加入S〜（2？），观察到从亮黄色到无色的肉眼变化。该探针的显着特征是S〜（2？）诱导的球形AGNP的独特形态转变为树枝状结构。虽然在众多工人通过各种方法也已经报告了树突盟队agps。在这里，我们展示了一种探针，其不仅是色性上的选择性识别S〜（2？），而且同时为AgNP的自组装树突结构铺平道路。发现S〜（2？）的最低检测限为67nm，是世界卫生组织（世卫组织）的饮用水中S〜（2？）的最大耐久水平（15μm）。

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