Silver nanoparticles AgNPs having small (6–8 nm) diameter, were synthesized in water in solutions and left interacting with diluted 3d metals (Co²⁺ or Ni²⁺ ions) solution (1–5 ppm range). The interactions between AgNPs and the metallic ions modify the optical response of the nanoparticles demonstrating their ability to capture metallic ions from water and making them valuable as metal contamination sensor. Here the coordination chemistry of Co and Ni adsorbed onto AgNPs is probed combining X-ray absorption spectroscopy (XAS) and X-ray photoelectron spectroscopy (XPS).

中文翻译：

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3d金属吸附的AgNPs的结构表征

在水中以溶液形式合成了直径较小（6-8 nm）的银纳米颗粒AgNP，并与稀释的3d金属（Co ²⁺或Ni ²⁺离子）溶液（1-5 ppm范围）相互作用。AgNP和金属离子之间的相互作用改变了纳米粒子的光学响应，这表明了纳米粒子从水中捕获金属离子的能力，使其成为有价值的金属污染传感器。在此，结合X射线吸收光谱（XAS）和X射线光电子能谱（XPS）探测了吸附在AgNPs上的Co和Ni的配位化学。