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

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We report a simple sol-gel method for the preparation of multilayered hybrid thin films composed of nanostructured SrTiO3 (STO) and BaTiO3 (BTO) layers. A nanoporous thin film of STO is prepared by the spin-coating method on Si/SiO2/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 (Tc) at around 280 °C, which is suitable for electric capacitor applications.

Original languageEnglish
Pages (from-to)915-921
Number of pages7
JournalACS Applied Nano Materials
Volume1
Issue number2
DOIs
Publication statusPublished - 2018 Feb 23

Keywords

  • Curie temperature
  • dielectric
  • films
  • interfaces
  • multilayers
  • nanoporous
  • sol-gel

ASJC Scopus subject areas

  • Materials Science(all)

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