Premium
Observation of Self‐Assembled Core–Shell Structures in Epitaxially Embedded TbErAs Nanoparticles
Author(s) -
Dongmo Pernell,
Hartshorne Matthew,
Cristiani Thomas,
Jablonski Michael L.,
Bomberger Cory,
Isheim Dieter,
Seidman David N.,
Taheri Mitra L.,
Zide Joshua
Publication year - 2014
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201400891
Subject(s) - atom probe , nanoparticle , materials science , epitaxy , atom (system on chip) , core (optical fiber) , shell (structure) , molecular beam epitaxy , lattice (music) , nanotechnology , chemical physics , crystallography , molecular physics , chemistry , composite material , physics , transmission electron microscopy , layer (electronics) , computer science , acoustics , embedded system
Self‐assembled core–shell structured rare‐earth nanoparticles (TbErAs) are observed in a III–V semiconductor host matrix (In 0.53 Ga 0.47 As) 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 profiles. 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.