Electron-induced Ti-rich surface segregation on SrTiO3 nanoparticles

Yuyuan Lin*, Jianguo Wen, Linhua Hu, James A. McCarthy, Shichao Wang, Kenneth R. Poeppelmeier, Laurence D. Marks

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Atomic surface structures of nanoparticles are of interest in catalysis and other fields. Aberration-corrected HREM facilitates direct imaging of the surfaces of nanoparticles. A remaining concern of surface imaging arises from beam damage. It is important to identify the intrinsic surface structures and the ones created by electron beam irradiation in TEM. In this study, we performed aberration-corrected HREM and EELS to demonstrate that TiO and bcc type Ti islands form due to intense electron irradiation. The formation of Ti-rich islands is in agreement with previous high temperature annealing experiments on the surfaces of SrTiO3 single crystals.

Original languageEnglish (US)
Pages (from-to)152-157
Number of pages6
JournalMicron
Volume68
DOIs
StatePublished - Jan 1 2015

Keywords

  • Beam damage
  • HREM
  • Nanoparticles
  • Simulation
  • Strontium titanate
  • Surface structure

ASJC Scopus subject areas

  • Structural Biology
  • Materials Science(all)
  • Physics and Astronomy(all)
  • Cell Biology

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