Atomic structure and bonding of the interfacial bilayer between Au nanoparticles and epitaxially regrown MgAl2O4 substrates

A unique metal/oxide interfacial bilayer formed between Au nanoparticles and MgAl2O4 substrates following thermal treatment is reported. Associated with the formation of the bilayer was the onset of an abnormal epitaxial growth of the substrate under the nanoparticle. According to the redistribution...

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Bibliographic Details
Published in:Applied physics letters 2014-12, Vol.105 (23)
Main Authors: Zhu, Guo-zhen, Majdi, Tahereh, Shao, Yang, Bugnet, Matthieu, Preston, John S., Botton, Gianluigi A.
Format: Article
Language:English
Subjects:
Applied physics
Atomic structure
Bilayers
Chemical bonds
Electronic structure
Electrons
Epitaxial growth
Gold
Heat treatment
Nanoparticles
Substrates
Transmission electron microscopy
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Summary:A unique metal/oxide interfacial bilayer formed between Au nanoparticles and MgAl2O4 substrates following thermal treatment is reported. Associated with the formation of the bilayer was the onset of an abnormal epitaxial growth of the substrate under the nanoparticle. According to the redistribution of atoms and the changes of their electronic structure probed across the interface by a transmission electron microscopy, we suggest two possible atomic models of the interfacial bilayer.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4902939