Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 22, Issue 43, Pages 25095-25102Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cp04659k
Keywords
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Funding
- Japan Society for the Promotion of Science [18J20894]
- JSPS KAKENHI [18K14070]
- Japan Prize Foundation
- Asahi Glass Foundation
- Foundation for Interaction in Science Technology
- [20201248]
- [20191100]
- [20191201]
- Grants-in-Aid for Scientific Research [18J20894, 18K14070] Funding Source: KAKEN
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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.
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