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

doi:10.1002/smll.201400891

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

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Self-assembled core-shell structured rare-earth nanoparticles (TbErAs) are observed in a III-V semiconductor host matrix (In_0.53Ga_0.47As) 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 language	English (US)
Pages (from-to)	4920-4925
Number of pages	6
Journal	Small
Volume	10
Issue number	23
DOIs	https://doi.org/10.1002/smll.201400891
State	Published - Dec 10 2014

Funding

Keywords

Atom probe tomography
Molecular beam epitaxy
Nanoparticles
Rare-earth
Terahertz

ASJC Scopus subject areas

General Chemistry
Engineering (miscellaneous)
Biotechnology
General Materials Science
Biomaterials

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10.1002/smll.201400891

Cite this

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title = "Observation of self-assembled core-shell structures in epitaxially embedded TbErAs nanoparticles",

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.",

keywords = "Atom probe tomography, Molecular beam epitaxy, Nanoparticles, Rare-earth, Terahertz",

author = "Pernell Dongmo and Matthew Hartshorne and Thomas Cristiani and Jablonski, {Michael L.} and Cory Bomberger and Dieter Isheim and Seidman, {David N.} and Taheri, {Mitra L.} and Joshua Zide",

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doi = "10.1002/smll.201400891",

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AU - Dongmo, Pernell

AU - Hartshorne, Matthew

AU - Cristiani, Thomas

AU - Jablonski, Michael L.

AU - Bomberger, Cory

AU - Isheim, Dieter

AU - Seidman, David N.

AU - Taheri, Mitra L.

AU - Zide, Joshua

PY - 2014/12/10

Y1 - 2014/12/10

N2 - 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.

AB - 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.

KW - Atom probe tomography

KW - Molecular beam epitaxy

KW - Nanoparticles

KW - Rare-earth

KW - Terahertz

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

Abstract

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Keywords

ASJC Scopus subject areas

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