• 文献标题:   In Situ Observation of the Early Stages of Rapid Solid-Liquid Reaction in Closed Liquid Cell TEM Using Graphene Encapsulation
  • 文献类型:   Article
  • 作  者:   CHA HW, AN BS, YANG CW
  • 作者关键词:   early stage of reaction, graphene encapsulation, in situ transmission electron microscopy tem, nanoparticle
  • 出版物名称:   MICROSCOPY MICROANALYSIS
  • ISSN:   1431-9276 EI 1435-8115
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1017/S1431927621013647 EA DEC 2021
  • 出版年:   2022

▎ 摘  要

In situ liquid cell transmission electron microscopy (TEM) is a very useful tool for investigating dynamic solid-liquid reactions. However, there are challenges to observe the early stages of spontaneous solid-liquid reactions using a closed-type liquid cell system, the most popular and simple liquid cell system. We propose a graphene encapsulation method to overcome this limitation of closed-type liquid cell TEM. The solid and liquid are separated using graphene to suspend the reaction until the graphene layer is destroyed. Graphene can be decomposed by the high-energy electron beam used in TEM, allowing the reaction to proceed. Fast dissolution of graphene-capped copper nanoparticles in an FeCl3 solution was demonstrated via in situ liquid cell TEM at 300 kV using a cell with closed-type SiNx windows.