Construction of Multilayer Films and Superlattice- And Mosaic-like Heterostructures of 2D Metal Oxide Nanosheets via a Facile Spin-Coating Process

Hitomi Yano, Nobuyuki Sakai, Yasuo Ebina, Renzhi Ma, Minoru Osada, Kenjiro Fujimoto, Takayoshi Sasaki

Research output: Contribution to journalArticlepeer-review

Abstract

This study reports a design of a variety of nanostructured films of 2D oxide nanosheets. We systematically examined the deposition of perovskite-type Ca2Nb3O10-nanosheets by spin-coating their dimethyl sulfoxide dispersion. Neat and homogeneous monolayer tiling was attained on various substrates by selecting an optimum rotation speed, which was dependent on the nanosheet concentration. Repeating the optimized spin-coating process allowed for layer-by-layer deposition of the nanosheets into multilayer films with a designed layer number. Vertical superlattice heterostructures could also be assembled by alternately spin-coating the suspensions of Ca2Nb3O10-and Ti0.87O20.52-nanosheets. Furthermore, spin-coating of a mixed suspension of Ca2Nb3O10-and Ti0.87O20.52-nanosheets led to a mixed mosaic-like monolayer of these two nanosheets. The present study thus demonstrated spin-coating as a facile and powerful route to construct various nanostructures based on 2D oxide nanosheets.

Original languageEnglish
Pages (from-to)43258-43265
Number of pages8
JournalACS Applied Materials and Interfaces
Volume13
Issue number36
DOIs
Publication statusPublished - 15 Sep 2021

Keywords

  • heterostructured films
  • layer-by-layer assembly
  • mixed monolayer
  • neat tiling
  • perovskite-type nanosheet
  • spin-coating process

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