In Situ Observation of the Early Stages of Rapid Solid–Liquid Reaction in Closed Liquid Cell TEM Using Graphene Encapsulation. (February 2022)

• Record Type: Journal Article
• Authors: Cha, Hyun Woo; An, Byeong-Seon; Yang, Cheol-Woong
• Is Part Of: Microscopy and microanalysis. Volume 28:Number 1(2022)
• Page Start: 53
• Page End: 60
• Publication Date: 2022-02
• Subjects: early stage of reaction -- graphene encapsulation -- in situ transmission electron microscopy (TEM) -- nanoparticle; Microscopy -- Periodicals; Microchemistry -- Periodicals; 502.82
• DOI: 10.1017/S1431927621013647
• Languages: English
• ISSNs: 1431-9276

Abstract

Abstract: Abstract : 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.