文献类型：期刊文献

英文题名：In situ liquid cell SEM observation of dynamic processes of Au nanoparticles

作者：Chen, Xin[1,2,4,5];Tan, Liyi[1,2,3];Cheng, Siyu[1,2];Liu, Yang[1,2];Zhu, Mengqin[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai, Peoples R China;[3]Lisiyi Instrument & Equipment Co Ltd, R&D Dept, Shaoxing, Peoples R China;[4]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[5]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China

年份：2023

卷号：86

期号：8

起止页码：1057

外文期刊名：MICROSCOPY RESEARCH AND TECHNIQUE

收录：;EI(收录号：20231714017079);WOS:【SCI-EXPANDED(收录号:WOS:000972807700001)】；

基金：National Natural Science Foundation of China, Grant/Award Number: 21875066; Shanghai Leading Academic Discipline Project, Grant/Award Number: 8502; the Shanghai Key Laboratory Project, Grant/Award Number: 08DZ2230500

语种：英文

外文关键词：Au nanoparticles; dynamic processes; in situ liquid cell SEM; in situ liquid electron microscopy

摘要：In situ liquid cell electron microscopy (LC-EM) is a powerful platform for real time nanoscale imaging of liquid systems. In situ liquid cell scanning electron microscopy (LC-SEM) as a relatively low cost and potentially more convenient characterization method, has not been as widely used as compared to in situ liquid cell transmission electron microscopy (LC-TEM). This paper reports a real time high resolution and comprehensive characterization of Au nanoparticles (NPs) and nanoparticle clusters (NPCs), which are surface-decorated with cetyltrimethylammonium bromide (CTAB), in an oleic acid (OA) emulsion system with LC-SEM. Single NP resolution images are routinely collected with both secondary electron (SE) and backscattered electron (BSE) imaging modes, with different SEM systems. Energy dispersive spectroscopy (EDS) mapping data clearly demonstrates the single particle level chemical element distributions, particle stacking structure, as well as the preferred distribution of OA molecules on the Au particle surfaces. Moreover, both liquid droplet growth and particle motions are observed with LC-SEM, among which, ways for faster tracking the single particle level dynamic motion behavior of Au NPs and NPCs are explored. We expect that our work will bring new insight of high resolution and fast analysis in a broad range of materials in liquid with LC-SEM.