Tuning phase stability of complex oxide nanocrystals via conjugation

Ho Hung Kuo, Lei Chen, Yanzhou Ji, Heng Jui Liu, Long Qing Chen, Ying Hao Chu

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Nanocrystals (NCs) attract tremendous research interests because of their unique properties to meet the demands of functionalities. To date, hybrid NCs with multiple components are developed to meet the rising demands that could be very difficult, or even impossible to be achieved by single-component NCs. Tuning properties by strain via conjugation could be an alternative solution. Strain engineering has been discovered and widely applied to many thin-film materials for tuning physical properties. Then, there is a further question to be addressed in this study: can we take the advantages we have learned in heteroepitaxy of thin films and transfer that into the NC conjugation? In order to demonstrate this possibility, we investigated NC conjugation of BiFeO 3 and LaAlO3. We found that change in either LaAlO 3-NC or BiFeO3-NC size would change the stability of rhombohedral-to-tetragonal phase transition. The present results show that strain engineering is possible to be realized in not only thin film but also NC conjugation. The same concept should be applicable to other complex oxide systems in order to broaden their practical applications for the rising demands of multifunctionalities.

Original languageEnglish (US)
Pages (from-to)3314-3320
Number of pages7
JournalNano letters
Volume14
Issue number6
DOIs
StatePublished - Jun 11 2014

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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