High-resolution transmission electron microscopy study of epitaxial oxide shell on nanoparticles of iron

Y. S. Kwok; X. X. Zhang; B. Qin; K. K. Fung

doi:10.1063/1.1333401

High-resolution transmission electron microscopy study of epitaxial oxide shell on nanoparticles of iron

Y. S. Kwok^*, X. X. Zhang, B. Qin, K. K. Fung

^*Corresponding author for this work

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

28 Scopus citations

Abstract

Remarkably oxidation-resistant nanoparticles of iron prepared at Tianjin University have been studied by electron diffraction and high-resolution transmission electron microscopy (HRTEM). HRTEM images clearly show the polyhedral epitaxy of γ-Fe₂O₃ layers on equivalent {100} facets of the {100} truncated {110} rhombic dodecahedral nanoparticles of iron. Oxide layers on {110} facets are formed by the lateral extension of the epitaxial {100} γ-Fe₂O₃ layers over adjacent {110} facets. The {110} oxide layers are bent and concave inward. The compressive γ-Fe₂O₃ layers which are about 4 nm thick give effective protection, according to the theory of Caberra-Mott, to the iron core from further oxidation.

Original language	English (US)
Pages (from-to)	3971-3973
Number of pages	3
Journal	Applied Physics Letters
Volume	77
Issue number	24
DOIs	https://doi.org/10.1063/1.1333401
State	Published - Dec 11 2000
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "High-resolution transmission electron microscopy study of epitaxial oxide shell on nanoparticles of iron",

abstract = "Remarkably oxidation-resistant nanoparticles of iron prepared at Tianjin University have been studied by electron diffraction and high-resolution transmission electron microscopy (HRTEM). HRTEM images clearly show the polyhedral epitaxy of γ-Fe2O3 layers on equivalent {100} facets of the {100} truncated {110} rhombic dodecahedral nanoparticles of iron. Oxide layers on {110} facets are formed by the lateral extension of the epitaxial {100} γ-Fe2O3 layers over adjacent {110} facets. The {110} oxide layers are bent and concave inward. The compressive γ-Fe2O3 layers which are about 4 nm thick give effective protection, according to the theory of Caberra-Mott, to the iron core from further oxidation.",

author = "Kwok, {Y. S.} and Zhang, {X. X.} and B. Qin and Fung, {K. K.}",

year = "2000",

month = dec,

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doi = "10.1063/1.1333401",

language = "English (US)",

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journal = "Applied Physics Letters",

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T1 - High-resolution transmission electron microscopy study of epitaxial oxide shell on nanoparticles of iron

AU - Kwok, Y. S.

AU - Zhang, X. X.

AU - Qin, B.

AU - Fung, K. K.

PY - 2000/12/11

Y1 - 2000/12/11

N2 - Remarkably oxidation-resistant nanoparticles of iron prepared at Tianjin University have been studied by electron diffraction and high-resolution transmission electron microscopy (HRTEM). HRTEM images clearly show the polyhedral epitaxy of γ-Fe2O3 layers on equivalent {100} facets of the {100} truncated {110} rhombic dodecahedral nanoparticles of iron. Oxide layers on {110} facets are formed by the lateral extension of the epitaxial {100} γ-Fe2O3 layers over adjacent {110} facets. The {110} oxide layers are bent and concave inward. The compressive γ-Fe2O3 layers which are about 4 nm thick give effective protection, according to the theory of Caberra-Mott, to the iron core from further oxidation.

AB - Remarkably oxidation-resistant nanoparticles of iron prepared at Tianjin University have been studied by electron diffraction and high-resolution transmission electron microscopy (HRTEM). HRTEM images clearly show the polyhedral epitaxy of γ-Fe2O3 layers on equivalent {100} facets of the {100} truncated {110} rhombic dodecahedral nanoparticles of iron. Oxide layers on {110} facets are formed by the lateral extension of the epitaxial {100} γ-Fe2O3 layers over adjacent {110} facets. The {110} oxide layers are bent and concave inward. The compressive γ-Fe2O3 layers which are about 4 nm thick give effective protection, according to the theory of Caberra-Mott, to the iron core from further oxidation.

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DO - 10.1063/1.1333401

M3 - Article

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 24

ER -

High-resolution transmission electron microscopy study of epitaxial oxide shell on nanoparticles of iron

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