Hydrothermal epitaxy growth of self-organized vanadium dioxide 3D structures with metal-insulator transition and THz transmission switch properties

Research output: Contribution to journalArticle

Authors

  • Artem Makarevich
  • Olga Makarevich
  • Alexey Ivanov
  • Dmitry Sharovarov
  • Andrey Eliseev
  • Vadim Amelichev
  • Olga Boytsova
  • Andrey Kaula

Colleges, School and Institutes

Abstract

The hydrothermal method is the most effective approach for the synthesis of VO 2 metastable polymorphs with unique powder crystallite morphology. In this work, we expanded the capabilities of this method, directing it to the growth of oriented crystallites in self-organized systems on single crystal substrates. According to our investigations, a large variety of 3D structures of vanadium dioxide can be obtained using one single crystal substrate r-sapphire by fine tuning of synthesis parameters. The orientation growth of six-pointed vanadium dioxide crystallites fits into an epitaxial growth model describing unit cell relations between the VO 2(M 1) film and r-sapphire substrate. We describe the process of VO 2(M 1) phase stabilization in the films and the changes of resistivity and terahertz transparency of the films based on the metal-insulator transition (MIT).

Details

Original languageEnglish
Pages (from-to)2612-2620
Number of pages9
JournalCrystEngComm
Volume22
Issue number15
Early online date26 Feb 2020
Publication statusPublished - 21 Apr 2020

Keywords

  • Terahertz, Vanadium dioxide, Epitaxy growth