Facile preparation of graphene–graphene oxide liquid cells and their application in liquid-phase STEM imaging of Pt atoms

Masaki Takeguchi; Kazutaka Mitsuishi; Ayako Hashimoto

doi:10.35848/1882-0786/ad63f2

Applied Physics Express (Jan 2024)

Facile preparation of graphene–graphene oxide liquid cells and their application in liquid-phase STEM imaging of Pt atoms

Masaki Takeguchi,
Kazutaka Mitsuishi,
Ayako Hashimoto

Affiliations

Masaki Takeguchi: ORCiD; Research Center for Energy and Environmental Materials, National Institute for Materials Science , Japan
Kazutaka Mitsuishi: ORCiD; Center for Basic Research on Materials, National Institute for Materials Science , Japan
Ayako Hashimoto: ORCiD; Research Center for Energy and Environmental Materials, National Institute for Materials Science , Japan; Degree Programs in Pure and Applied Sciences, University of Tsukuba , Japan

DOI: https://doi.org/10.35848/1882-0786/ad63f2
Journal volume & issue: Vol. 17, no. 8
p. 085001

Abstract

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Graphene–graphene oxide (GO) hybrid liquid cells (LCs) for liquid-phase scanning transmission electron microscopy (STEM) were fabricated using a facile method with commercial graphene on a polymethyl methacrylate sheet and GO on a TEM grid. LCs containing Pt nanoparticles (NPs) and pure water were efficiently produced and observed via STEM. Their composition and thickness were characterized by STEM-electron energy-loss spectroscopy. High-resolution (HR) STEM revealed slow-moving Pt NPs’ atomic structures and fast-moving single Pt atoms at the LC’s thin edges. Minimal damage during HR STEM indicated stable LCs because of their excellent electrical and thermal conductivities and radiolysis species scavenging ability.

Published in Applied Physics Express

ISSN: 1882-0778 (Print); 1882-0786 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Physics
Website: https://iopscience.iop.org/journal/1882-0786

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