Influence of the crystal structure on the physical properties of monoclinic ZrO2 nanocrystals

Minori Taguchi, Akiyuki Matsushita, Tetsuo Uchikoshi, Yoshio Sakka, Seiichi Takami, Toshitaka Funazukuri, Takashi Naka

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The influence of the crystal structure on the physical properties of monoclinic ZrO2 nanocrystals is investigated by an annealing treatment. Monoclinic ZrO2 nanocrystals with diameters of approximately 20 nm are synthesized by a hydrothermal method using subcritical water. The nanocrystals have chemisorbed water molecules, hydroxides and nitro groups on their surfaces. The crystallographic structures are reformed by annealing the nanocrystals at 800 °C for 5 h. This treatment causes the crystallite sizes to increase, the crystal lattice to shrink and some of the molecules chemisorbed on the surfaces to be lost. The annealing treatment leads to there being fewer lattice defects, and to the modification of surface characteristics of the nanocrystals. The treatment also changes the optical absorption characteristics of the nanocrystals. The magnetic moments caused by lattice defects are identified.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalNano-Structures and Nano-Objects
Volume1
DOIs
Publication statusPublished - 2015 Oct 14

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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