文献类型：期刊文献

英文题名：High resolution observation of a noble-metal/ZnO-QDs/rGO ternary system through an ultra-thin SiNx window using in situ liquid cell scanning electron microscopy

作者：Liu, Yang[1,2];Sheng, Linfeng[1];Abdullah, Muhammad[1];Shen, Xing[3];He, Ying[1];Liu, Juan[4];Chen, Xin[1]

机构：[1]East China Univ Sci & Technol, Key Lab Ultrafine Mat, Shanghai Key Lab Adv Polymer Mat, Sch Mat Sci & Engn,Minist Educ, Shanghai 200237, Peoples R China;[2]Lisiyi Instrument & Equipment Co Ltd, Shaoxing 312000, Peoples R China;[3]Shanghai Jiao Tong Univ, Ruijin Hosp, Proton Therapy Ctr, Sch Med,Pancreat Dis Ctr, Shanghai 201800, Peoples R China;[4]East China Univ Sci & Technol, Res Ctr Anal & Test, Shanghai 200237, Peoples R China

年份：2024

卷号：48

期号：33

起止页码：14538

外文期刊名：NEW JOURNAL OF CHEMISTRY

收录：;EI(收录号：20243016733062);WOS:【SCI-EXPANDED(收录号:WOS:001272505400001)】；

基金：We sincerely appreciate the financial support of this work from the National Natural Science Foundation of China (21875066), the Shanghai Leading Academic Discipline Project (8502), and the Shanghai Key Laboratory Project (08DZ2230500).

语种：英文

外文关键词：Cells - Cytology - Graphene - II-VI semiconductors - Image resolution - Scanning electron microscopy - Semiconductor quantum dots - Zinc oxide

摘要：In situ liquid cell electron microscopy technology has high temporal and spatial resolution, enabling real-time observation of physical and chemical processes in liquid environments. However, the common in situ liquid cell scanning electron microscopy (LC-SEM) technology has faced limitations due to the relatively large thickness of the SiNx window, resulting in unsatisfactory resolution and limiting the broad adoption of the LC-SEM technology. This article represents one novel approach of utilizing ultra-thin SiNx windows for LC-SEM observation of the distribution and dynamic changes of gold (Au) nanoparticles/zinc oxide quantum dots (ZnO QDs)/reduced graphene oxide (rGO) ternary composites in liquid. The results demonstrate a single/near-single dispersed distribution of ZnO QDs on the surface of the rGO, with Au nanoparticles and ZnO clusters mainly concentrated on the rGO folds. The composite structure demonstrates relative stability, attributed to electrostatic forces. Using Au nanoparticles and ZnO QDs as hierarchical reference markers, a high LC-SEM image resolution of similar to 4 nm is obtained, which allows the observation and motion analysis of the Au nanoparticles, rGO nanosheets, and ZnO QDs in the liquid cell. Such LC-SEM technology shows good repeatability on the noble-metal/ZnO-QDs/rGO ternary composite samples, with good potential for future QD composite material research studies.