Ferroelectric properties of BaTiO3 nanocube self-assembled monolayers: an investigation using piezoresponse force microscopy

被引：3

作者：

Itasaka, Hiroki ^{[1
]}

Mimura, Ken-ichi ^{[1
]}

Yasui, Kyuichi ^{[1
]}

Hamamoto, Koichi ^{[1
]}

Kato, Kazumi ^{[2
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Innovat Funct Mat Res Inst, Nagoya, Aichi 4638560, Japan

[2] Natl Inst Adv Ind Sci & Technol, Ibaraki 3058560, Japan

来源：

APPLIED PHYSICS EXPRESS | 2022年 / 15卷 / 09期

关键词：

barium titanate; nanocube; piezoelectric force microscopy; ferroelectricity; self-assembly;

D O I：

10.35848/1882-0786/ac8969

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigated the ferroelectric properties of barium titanate (BTO) nanocube self-assembled monolayers with and without heat treatment using piezoresponse force microscopy (PFM). Observations of polarization switching behavior confirmed that BTO nanocube monolayers about 15 nm thick are ferroelectric, even without heat treatment. Vertical PFM phase imaging of the monolayers revealed that heat treatment changed the ferroelectric polarization distribution in the monolayers at 800 degrees C. Atomic force microscopy and transmission electron microscopy suggested that this change originated from the residual stress caused by mechanical interactions between neighboring BTO nanocubes and between the monolayers and the substrate.

引用

页数：6

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