Zhang Lan, Li Xin, He Rong, Wu Lijun, Zhang Liyun, Zeng Jie
Institute of Technical Biology and Agriculture Engineering, Key Laboratory of Ion Beam Bioengineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; Hefei National Laboratory for Physical Sciences at the Microscale & Collaborative Innovation Center of Suzhou Nano Science and Technology, Center of Advanced Nanocatalysis (CAN-USTC) & Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
Institute of Technical Biology and Agriculture Engineering, Key Laboratory of Ion Beam Bioengineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China.
Environ Pollut. 2015 Sep;204:145-51. doi: 10.1016/j.envpol.2015.04.018. Epub 2015 May 14.
The effects of chloride on dissolution and toxicity of silver nanoparticles (AgNPs) have been well studied. However, their intermediate shapes during the transition have not been illustrated to-date. Herein, the chloride-induced shape transformation process of AgNPs under long-term, low-concentration conditions is explored. A unique triangular Ag-AgCl heterostructure is observed. The structure then evolves into a symmetric hexapod and finally into a smaller AgNP. This transformation process could be affected by other environmental conditions, such as 0.4 mg/mL humic acid, 5% surfactants and 1 mg/mL bovine serum albumin protein. Our results offer new knowledge regarding the shape transformation process of AgNPs in the presence of chloride, which can be valuable in relevant studies concerning the effect of water chemistry on the behavior of AgNPs.
氯化物对银纳米颗粒（AgNPs）溶解和毒性的影响已得到充分研究。然而，到目前为止，它们在转变过程中的中间形状尚未得到阐明。在此，我们探索了在长期、低浓度条件下氯化物诱导的AgNPs形状转变过程。观察到一种独特的三角形Ag-AgCl异质结构。该结构随后演变成对称的六足体，最终变成更小的AgNP。这种转变过程可能会受到其他环境条件的影响，如0.4 mg/mL腐殖酸、5%表面活性剂和1 mg/mL牛血清白蛋白。我们的结果提供了关于在氯化物存在下AgNPs形状转变过程的新知识，这对于有关水化学对AgNPs行为影响的相关研究可能具有重要价值。
