A variety of chemical sensing materials and procedures for conveniently detecting mercuric ion (II) (Hg²⁺) have been extensively explored. The detection challenges for accomplishing a simple, fast, and low investment procedure at the ultrasensitive level are ongoing. Herein we report a quadrillionth level for detecting Hg²⁺ by the surface-enhanced Raman scattering (SERS) technique. There is an interaction of silver nanoparticles decorated on a zinc-oxide tetrapod structure and coated on FTO glass () with an organic ligand. 4,4′-Dipyridyl (DPy) performed as being chemisorbed by Ag nanoparticles interacting with a pyridine ring to produce plasmonic hot spots for SERS. The morphology of the surface and porous structure of the tetrapod becomes the powerful platform for enhanced SERS performance of DPy detection. In the absence of the augmentative electrolyte, the enhancement factor for DPy is more than 10⁷. The inhibiting of the aggregation between Ag and DPy was present following the appearance of Hg²⁺, demonstrated by the quenching of the SERS signal from the DPy molecules. The capability to reproduce and the selectivity of the sensing by DPy were both demonstrated. In addition, the applications for detecting Hg²⁺ in natural water and beverages were successfully detected. These results demonstrated the SERS sensors had the potential for detecting Hg²⁺ in practical use.

中文翻译：

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基于微孔氧化物的表面增强拉曼散射膜，用于四次检测汞离子（II）

为了方便地检测汞离子（II）（Hg ²⁺），已广泛探索了多种化学传感材料和程序。在超灵敏水平上完成简单，快速和低投资程序的检测挑战仍在进行中。在这里，我们报告了检测汞²⁺的四氢萘含量通过表面增强拉曼散射（SERS）技术。装饰在氧化锌四脚架结构上并用有机配体涂覆在FTO玻璃（）上的银纳米颗粒之间存在相互作用。4,4'-联吡啶（DPy）表现为被Ag纳米颗粒与吡啶环相互作用而化学吸附，从而产生SERS的等离激元热点。四脚架的表面和多孔结构的形态成为增强DPy检测SERS性能的有力平台。在不存在增强电解质的情况下，DPy的增强因子大于10 ⁷。Hg ²⁺的出现抑制了Ag和DPy之间的聚集由来自DPy分子的SERS信号的淬灭证明。都展示了复制能力和DPy传感的选择性。此外，还成功检测了用于检测天然水和饮料中Hg ²⁺的应用。这些结果表明，SERS传感器在实际使用中具有检测Hg ²⁺的潜力。