Title: Synthesis of Epitaxial Metal Oxide Nanocrystals via a Phase Separation Approach
Authors: Bogle, Kashinath A.
Anbusathaiah, Varatharajan
Arredondo, Miryam
Lin, Jiunn-Yuan
Chu, Ying-Hao
O'Neill, Christopher
Gregg, John M.
Castell, Martin R.
Nagarajan, Valanoor
材料科學與工程學系
物理研究所
Department of Materials Science and Engineering
Institute of Physics
Keywords: epitaxial nanocrystals;pulse laser deposition;metal oxide;phase separation;volatization
Issue Date: 1-Sep-2010
Abstract: Perovskite phase instability of BiMnO(3) has been exploited to synthesize epitaxial metal oxide magnetic nanocrystals. Thin film processing conditions are tuned to promote the breakdown of the perovskite precursor into Bi(2)O(3) matrix and magnetic manganese oxide islands. Subsequent cooling in vacuum ensures complete volatization of the Bi(2)O(3), thus leaving behind an array of self-assembled magnetic Mn(3)O(4) nanostructures. Both shape and size can be systematically controlled by the ambient oxygen environments and deposition time. As such, this approach can be extended to any other Bi-based complex ternary oxide system as it primarily hinges on the breakdown of parent Bi-based precursor and subsequent Bi(2)O(3) volatization.
URI: http://dx.doi.org/10.1021/nn1010123
http://hdl.handle.net/11536/32237
ISSN: 1936-0851
DOI: 10.1021/nn1010123
Journal: ACS NANO
Volume: 4
Issue: 9
Begin Page: 5139
End Page: 5146
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