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Distinctive stability of a free-standing monolayer clay mineral nanosheet via transmission electron microscopy

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Title: Distinctive stability of a free-standing monolayer clay mineral nanosheet via transmission electron microscopy
Authors: Akita, Ikumi Browse this author
Ishida, Yohei Browse this author
Yonezawa, Tetsu Browse this author →KAKEN DB
Issue Date: 21-Nov-2020
Publisher: Royal Society of Chemistry
Journal Title: Physical chemistry chemical physics
Volume: 22
Issue: 43
Start Page: 25095
End Page: 25102
Publisher DOI: 10.1039/d0cp04659k
Abstract: Among 2D materials, clay mineral nanosheets have been extensively studied owing to their specific features, such as high surface charge and large surface area. Recently, we reported a stable free-standing (without any surfactants or matrices) monolayer clay mineral, characterized via annular dark-field scanning transmission electron microscopy (ADF-STEM) at the atomic-scale. Herein, we demonstrated that the monolayer clay mineral exhibited outstanding stability under electron beam irradiation compared to two- or three-layered nanosheets via electron diffraction analysis. In addition to its low thickness (similar to 1 nm-thick), the absence of an interlayer space was the critical factor contributing to the distinctive stability of the monolayer clay mineral, compared to that of the two- or three-layered clay mineral. The findings here inspire further investigation in free-standing clay mineral using (S)TEM and also for a wide variety of nanomaterials which are strongly hydrated.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 石田 洋平

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