Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, China.
Nano Lett. 2022 Jun 8;22(11):4383-4391. doi: 10.1021/acs.nanolett.2c00831. Epub 2022 May 12.
Real-time probing of the compositional evolution of single nanoparticles during an electrochemical reaction is crucial for understanding the structure-performance relationship and rationally designing nanomaterials for desirable applications; however, it is consistently challenging to achieve high-throughput real-time tracking. Here, we present an optical imaging method, termed plasmonic scattering interferometry microscopy (PSIM), which is capable of imaging the compositional evolution of single nanoparticles during an aqueous electrochemical reaction in real time. By quantifying the plasmonic scattering interferometric pattern of nanoparticles, we establish the relationship between the pattern and composition of single nanoparticles. Using PSIM, we have successfully probed the compositional transformation dynamics of multiple individual nanoparticles during electrochemical reactions. PSIM could be used as a universal platform for exploring the compositional evolution of nanomaterials at the single-nanoparticle level and offers great potentials for addressing the extensive fundamental questions in nanoscience and nanotechnology.
实时探测单个纳米粒子在电化学反应过程中的组成演变对于理解结构-性能关系和合理设计用于预期应用的纳米材料至关重要；然而，实现高通量实时跟踪一直具有挑战性。在这里，我们提出了一种光学成像方法，称为等离子体散射干涉显微镜（PSIM），它能够实时成像单个纳米粒子在水相电化学反应过程中的组成演变。通过量化纳米粒子的等离子体散射干涉图案，我们建立了图案与单个纳米粒子组成之间的关系。使用 PSIM，我们已经成功地探测了多个单个纳米粒子在电化学反应过程中的组成转变动力学。PSIM 可以用作在单个纳米粒子水平上探索纳米材料组成演变的通用平台，并为解决纳米科学和纳米技术中的广泛基础问题提供了巨大的潜力。
