Super-Resolution Electrogenerated Chemiluminescence Microscopy for Single-Nanocatalyst Imaging,Journal of the American Chemical Society

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Super-Resolution Electrogenerated Chemiluminescence Microscopy for Single-Nanocatalyst Imaging
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2021-10-26 , DOI: 10.1021/jacs.1c07827
Ming-Ming Chen ₁ , Cong-Hui Xu ₁ , Wei Zhao _{1,

2} , Hong-Yuan Chen ₁ , Jing-Juan Xu ₁

Affiliation

Electrogenerated chemiluminescence microscopy (ECLM) provides a real-time imaging approach to visualize the surface-dependent catalytic activity of nanocatalysts, which helps to rationalize the design of catalysts. In this study, we first propose super-resolution ECLM that could measure the facet- and site-specific activities of a single nanoparticle with nanometer resolution. The stochastic nature of the ECL emission makes the generation of photons obey Poisson statistics, which fits the requirement of super-resolution radial fluctuation (SRRF). By processing an SRRF algorithm, the spatial resolution of ECL images achieved ca. 100 nm, providing more abundant details on electrocatalytic reactivities at the subparticle level. Beyond conventional wide-field ECL imaging, super-resolution ECLM provided the spatial distribution of catalytic activities at a Au nanorod and nanoplate with scales of a few hundred nanometers. It helped uncover the facet- and defect-dependent surface activity, as well as the dynamic fluctuation of reactivity patterns on single nanoparticles. The super-resolution ECLM provides high spatiotemporal resolution, which shows great potential in the field of catalysis, biological imaging, and single-entity analysis.

中文翻译：

用于单纳米催化剂成像的超分辨率电生化学发光显微镜

电生成化学发光显微镜 (ECLM) 提供了一种实时成像方法来可视化纳米催化剂的表面依赖性催化活性，这有助于合理化催化剂的设计。在这项研究中，我们首先提出了超分辨率 ECLM，它可以测量具有纳米分辨率的单个纳米颗粒的面和位点特异性活动。ECL发射的随机性使得光子的产生服从泊松统计，符合超分辨率径向涨落（SRRF）的要求。通过处理 SRRF 算法，ECL 图像的空间分辨率达到了 ca。100 nm，在亚粒子水平上提供更丰富的电催化反应细节。除了传统的宽视场 ECL 成像，超分辨率ECLM提供了几百纳米尺度的金纳米棒和纳米板催化活性的空间分布。它有助于揭示依赖于刻面和缺陷的表面活性，以及单个纳米粒子上反应模式的动态波动。超分辨率ECLM提供高时空分辨率，在催化、生物成像和单实体分析领域显示出巨大潜力。

更新日期：2021-11-10

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