Observation of self-assembled core-shell structures in epitaxially embedded TbErAs nanoparticles

Pernell Dongmo, Matthew Hartshorne, Thomas Cristiani, Michael L. Jablonski, Cory Bomberger, Dieter Isheim, David N. Seidman, Mitra L. Taheri, Joshua Zide*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Self-assembled core-shell structured rare-earth nanoparticles (TbErAs) are observed in a III-V semiconductor host matrix (In0.53Ga0.47As) nominally lattice-matched to InP, grown via molecular beam epitaxy. Atom probe tomography demonstrates that the TbErAs nanoparticles have a core-shell structure, as seen both in the tomographic atom-by-atom reconstruction and concentration profi les. A simple thermodynamic model is created to determine when it is energetically favorable to have core-shell structures; the results strongly agree with the observations.

Original languageEnglish (US)
Pages (from-to)4920-4925
Number of pages6
JournalSmall
Volume10
Issue number23
DOIs
StatePublished - Dec 10 2014

Keywords

  • Atom probe tomography
  • Molecular beam epitaxy
  • Nanoparticles
  • Rare-earth
  • Terahertz

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

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