Optical Resolution of the Morphological Change of Single Nanoparticles at Native Conditions: A Nonsuper-Resolution Approach

文献类型： 外文期刊

第一作者： Zheng, Yuhao

作者： Zheng, Yuhao;Wang, Xinyi;Xu, Dou;Li, Yapeng;Chen, Mengwei;Jiang, Wenbo;Fang, Yimin;Xu, Guohailin;Kong, Jie;Xu, Guohailin;Chen, Jingwen;Kong, Jie;Chen, Shan

作者机构：

关键词： dark-field scattering microscopy; angular scanning; morphological identification; nanoparticles; high-throughput

期刊名称：ACS SENSORS （ 影响因子：9.1； 五年影响因子：8.9 ）

ISSN： 2379-3694

年卷期： 2025 年 10 卷 7 期

页码：

收录情况： SCI

摘要： Label-free optical imaging of the morphology of single nanoparticles under native conditions remains a challenging task despite its importance in the synthesis, properties, and applications of nanomaterials. Here, we developed an angular scanning dark-field scattering microscopy (ASDFSM) that can identify the particle morphologies by the features of their angle-dependent scattering intensities without increasing spatial resolution. ASDFSM can unambiguously resolve the morphology of single nanoparticles with sizes down to 1/5 wavelength of the incident light in a large field of view, facilitating the simultaneous imaging of a large number of nanoparticles with statistical significance. Coupling with a random forest machine learning algorithm, their morphologies can be well-identified with an average accuracy of 96%, facilitating in situ monitoring of the corrosion and growth kinetics of single nanoparticles in a high-temperature solution. The ASDFSM possesses the advantages of high-throughput, noninvasiveness, dynamic traceability, and simplicity over the present methods, promising its wide applications in nanoscience.

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