Affordable Access

Publisher Website

Possible role of hydroxyl group on local structure and phase transition of KNbO3and KTaO3nanocrystals

Authors
Journal
Physica B Condensed Matter
0921-4526
Publisher
Elsevier
Publication Date
Volume
405
Issue
23
Identifiers
DOI: 10.1016/j.physb.2010.09.022
Keywords
  • Knbo3And Ktao3Nanocrystals
  • Hydrothermal Method
  • Phonons
  • Phase Transitions
Disciplines
  • Earth Science
  • Geography
  • Physics

Abstract

Abstract We investigate the structural and phase transition characteristics of hydrothermally grown KNbO 3 and KTaO 3 nanocrystals. Field emission scanning electron microscope and transmission electron microscope measurements clearly show that the KNbO 3 crystal has a nanorod shape while the KTaO 3 crystal has a nanocube shape. Fourier transform infrared spectroscopy measurement reveals the existence of a hydroxyl group in both nanocrystals. The hydroxyl group seems to be related to the enlarged lattice constants, the lowered structural phase transition temperatures, the broad phonon width and the increased number of Raman-active phonon modes in KNbO 3 and KTaO 3 nanocrystals.

There are no comments yet on this publication. Be the first to share your thoughts.