Abstract A novel optical probe consistinsg of Ag@PANI (silver-polyaniline) nanocomposites was developed for detection of mercury ions (Hg2+). The poly-dispersed Ag@PANI nanocomposites were synthesized by complexation reaction method. We studied structural and functional properties of polymer nanocomposites thoroughly. Ag@PANI nanocomposites consist of fibrous morphology with a mean particle size of 31.39 nm. Ag@PANI nanocomposites consist of face-centered cubic crystal structure with an average crystallite size of 19.41 nm. Raman spectroscopy was used in sensitive and selective detection of Hg2+ ions in dynamic range of 0.01–0.1 ppm with limit of detection of 0.019 ppm. Ag@PANI nanocomposite sensor for Hg (II) ions has shown some sublime results in pH range 3–5. Ag@PANI-based sensing probe can be beneficial for Hg2+ ions detection in highly sensitive biological, chemical and environmental analysis. Our sensing probe has shown good reproducibility, and all recorded observations revealed that sensing probe consisting of Ag@PANI nanocomposites is well suited for detection of Hg2+ ions.

中文翻译：

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络合法合成Ag@PANI纳米复合材料及其作为无标记化学探针检测汞离子的应用

摘要 开发了一种由Ag@PANI（银-聚苯胺）纳米复合材料组成的新型光学探针，用于检测汞离子（Hg2+）。采用络合反应法合成了多分散的Ag@PANI纳米复合材料。我们彻底研究了聚合物纳米复合材料的结构和功能特性。Ag@PANI 纳米复合材料由平均粒径为 31.39 nm 的纤维形态组成。Ag@PANI 纳米复合材料由面心立方晶体结构组成，平均晶粒尺寸为 19.41 nm。拉曼光谱用于灵敏和选择性检测 Hg2+ 离子，动态范围为 0.01–0.1 ppm，检测限为 0.019 ppm。用于 Hg (II) 离子的 Ag@PANI 纳米复合传感器在 pH 值范围 3-5 中显示出一些卓越的结果。基于 Ag@PANI 的传感探针有利于在高灵敏度的生物、化学和环境分析中检测 Hg2+ 离子。我们的传感探针显示出良好的重现性，所有记录的观察结果表明，由 Ag@PANI 纳米复合材料组成的传感探针非常适合检测 Hg2+ 离子。