journal article·2018-02-23

Chemical Synthesis of Multilayered Nanostructured Perovskite Thin Films with Dielectric Features for Electric Capacitors

Mohamed Barakat Zakaria, Takahiro Nagata, Asahiko Matsuda, Yudai Yasuhara, Atsushi Ogura, Md. Shahriar A. Hossain, Motasim Billah, Yusuke Yamauchi, Toyohiro Chikyow

ACS Applied Nano Materials· Volume 1· Issue 2
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Abstract

We report a simple sol–gel method for the preparation of multilayered hybrid thin films composed of nanostructured SrTiO 3 (STO) and BaTiO 3 (BTO) layers. A nanoporous thin film of STO is prepared by the spin-coating method on Si/SiO 2 /Ti/Pt substrate. When the BTO is processed, the BTO is crystallized between STO crystal pores. A significant strain field is induced on the interface between the STO and BTO surfaces. The concave shape of the nanopores could enable the realization of a highly strained interfacial heterostructure composed of STO/BTO. Compared to nanostructured STO, BTO, and bilayer STO/BTO films, multilayered STO/BTO films show the highest dielectric constant and a high Curie temperature ( T c ) at around 280 °C, which is suitable for electric capacitor applications.
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Research context

OpenAlex topics: Ferroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis · Dielectric properties of ceramics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan

Department of Chemistry, Faculty of Science, Tanta University, Tanta, Gharbeya 31527, Egypt

Materials Data & Integrated System (MaDIS), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan

Graduate School of Science and Technology, Meiji University, Kawasaki 214-8571, Japan

School of Chemistry & Australian Institute for Innovative Materials (AIIM), University of Wollongong, Squires Way, North Wollongong, New South Wales 2500, Australia

Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheunggu, Yongin-si, Gyeonggi-do 446-701, South Korea

School of Chemical Engineering & Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia

Funding

Japan Society for the Promotion of Science

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