Nucleation and growth of epitaxial metal-oxide films based on polymer-assisted deposition

Polymer-assisted deposition (PAD) is one of the chemical solution deposition methods which have been successfully used to grow films, form coatings, and synthesize nanostructured materials. In comparison with other conventional solution-based deposition techniques, PAD differs in its use of water-so...

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Bibliographic Details
Published in:Chemical Society reviews 2014-04, Vol.43 (7), p.2141-2146
Main Authors: McCleskey, T. M, Shi, P, Bauer, E, Highland, M. J, Eastman, J. A, Bi, Z. X, Fuoss, P. H, Baldo, P. M, Ren, W, Scott, B. L, Burrell, A. K, Jia, Q. X
Format: Article
Language:English
Subjects:
Cations
Deposition
Epitaxial growth
Filtration
Mathematical models
Metal oxides
Nucleation
Precursors
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Summary:Polymer-assisted deposition (PAD) is one of the chemical solution deposition methods which have been successfully used to grow films, form coatings, and synthesize nanostructured materials. In comparison with other conventional solution-based deposition techniques, PAD differs in its use of water-soluble polymers in the solution that prevent the metal ions from unwanted chemical reactions and keep the solution stable. Furthermore, filtration to remove non-coordinated cations and anions in the PAD process ensures well controlled nucleation, which enables the growth of high quality epitaxial films with desired structural and physical properties. The precursor solution is prepared by mixing water-soluble polymer(s) with salt(s). Thermal treatment of the precursor films in a controlled environment leads to the formation of desired materials. Using BaTiO 3 grown on SrTiO 3 and LaMnO 3 on LaAlO 3 as model systems, we show the effect of filtration on the nucleation and growth of epitaxial complex metal-oxide films based on the PAD process. Binding metal ions to polymers protects metal ions from reaction at low temperatures before polymers are depolymerized and makes filtration possible in the PAD process.
ISSN:0306-0012
1460-4744
DOI:10.1039/c3cs60285k