Nanomaterials Field
Soft Chemistry Group
We produce nanosheets and nanomeshes by exfoliating layered compounds, and we develop functional materials by organizing them as a 2D building block.
Group Leader: Takayoshi Sasaki
Layer-by-Layer Construction of Hierarchical Nanostructured Films via Electrostatic Self-Assembly of Exfoliated Unilamellar Zeolite Nanosheets
Current Topics
Two types of zeolite nanosheets, recently developed in our lab [3], were deposited onto a substrate as nanostructured films via sequential adsorption with polycation [2]. The successful layer-by-layer deposition of these nanosheets has been confirmed through various characterization techniques, including FT-IR and XRD data (Fig. 1), enabling the design of mono- to multilayer films as well as heteroassembled superlattice systems.
Fig. 1. Heteroassembly of mww- and bifer-type zeolite nanosheets monitored by FT-IR spectra
Outline of Research
Molecularly thin 2D nanosheets of oxides and hydroxides are produced from appropriate layered host compounds via soft-chemical delamination processes. Special attention is given to nanomeshes, or nanosheets having regular open channels that exhibit high efficient permeation for ions and molecules (Fig. 2). These nanosheets and nanomeshes are organized into nano- to mesostructured materials, which are anticipated to work as unique catalysts, separators, electrode materials, and so forth[1,2].
Fig. 2. Typical 2D nanosheets and nanomeshes of oxides and hydroxides
References
- N. Sakai & T. Sasaki, Acc. Mater. Res. 5, 752 (2024). DOI: 10.1021/accountsmr.4c00072
- C. Wang et al., Small 20, 2308293 (2024). DOI: 10.1002/smll.202308293
- W. Roth et al., Adv. Mater. 36, 2307341 (2024). DOI: 10.1002/adma.202307341
Group members
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Takayoshi Sasaki・Group Leader・Fellow -
Nobuyuki Sakai・Principal Researcher -
Yasuo Ebina・Principal Researcher