Single-Particle Electrochemical Imaging Provides Insights into Silver Nanoparticle Dissolution at the Solution–Solid Interface,ACS Applied Materials & Interfaces

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Single-Particle Electrochemical Imaging Provides Insights into Silver Nanoparticle Dissolution at the Solution–Solid Interface
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-05-03 , DOI: 10.1021/acsami.2c05148
Di Jiang _{1,

2} , Hai-Bo Chen ₂ , Xiao-Li Zhou ₁ , Xian-Wei Liu _{1,

2}

Affiliation

Dissolution of nanoparticles is an environmental interfacial process that affects the transformation of nanoparticles. Understanding the dissolution processes of nanoparticles is important to predict their fate in the aquatic environment. However, studying nanoparticle dissolution kinetics is still challenging since dissolution is usually coupled with nanoparticle aggregation. Here, we probed the dissolution process of Ag nanoparticles at the single-particle level by surface plasmon resonance microscopy. The single-particle imaging capability enabled us to classify Ag nanoparticles, measure the dissolution dynamics of single nanoparticles, and correlate the aggregation size with oxidation activity. Moreover, we studied the dual effect of natural organic matter on the dissolution of Ag nanoparticles and validated this result with real natural freshwater. Our study provides new insights into the dissolution of Ag nanoparticles, and this technique can be extended for other nanomaterials to evaluate their fate in aquatic environments.

中文翻译：

单粒子电化学成像提供了银纳米粒子在溶液-固体界面溶解的见解

纳米粒子的溶解是影响纳米粒子转化的环境界面过程。了解纳米粒子的溶解过程对于预测它们在水生环境中的命运很重要。然而，研究纳米颗粒溶解动力学仍然具有挑战性，因为溶解通常与纳米颗粒聚集相结合。在这里，我们通过表面等离子共振显微镜在单粒子水平上探测了银纳米粒子的溶解过程。单粒子成像能力使我们能够对 Ag 纳米粒子进行分类，测量单个纳米粒子的溶解动力学，并将聚集尺寸与氧化活性相关联。而且，我们研究了天然有机物对银纳米颗粒溶解的双重影响，并用真正的天然淡水验证了这一结果。我们的研究为 Ag 纳米粒子的溶解提供了新的见解，并且这项技术可以扩展到其他纳米材料，以评估它们在水生环境中的命运。

更新日期：2022-05-03

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