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  Lattice strain-enhanced exsolution of nanoparticles in thin films

Han, H., Park, J., Nam, S. Y., Kim, K. J., Choi, G. M., Parkin, S. S. P., et al. (2019). Lattice strain-enhanced exsolution of nanoparticles in thin films. Nature Communications, 10: 1471. doi:10.1038/s41467-019-09395-4.

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https://doi.org/10.1038/s41467-019-09395-4 (Publisher version)
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Han, Hyeon1, Author              
Park, Jucheol2, Author
Nam, Sang Yeol2, Author
Kim, Kun Joong2, Author
Choi, Gyeong Man2, Author
Parkin, Stuart S. P.1, Author              
Jang, Hyun Myung2, Author
Irvine, John T. S.2, Author
Affiliations:
1Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society, ou_3287476              
2External Organizations, ou_persistent22              

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 Abstract: Nanoparticles formed on oxide surfaces are of key importance in many fields such as catalysis and renewable energy. Here, we control B-site exsolution via lattice strain to achieve a high degree of exsolution of nanoparticles in perovskite thin films: more than 1100 particles μm-2 with a particle size as small as ~5 nm can be achieved via strain control. Compressive-strained films show a larger number of exsolved particles as compared with tensile-strained films. Moreover, the strain-enhanced in situ growth of nanoparticles offers high thermal stability and coking resistance, a low reduction temperature (550 °C), rapid release of particles, and wide tunability. The mechanism of lattice strain-enhanced exsolution is illuminated by thermodynamic and kinetic aspects, emphasizing the unique role of the misfit-strain relaxation energy. This study provides critical insights not only into the design of new forms of nanostructures but also to applications ranging from catalysis, energy conversion/storage, nano-composites, nano-magnetism, to nano-optics.

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 Dates: 2019-05-022019-04-01
 Publication Status: Published online
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 Identifiers: BibTex Citekey: P13755
DOI: 10.1038/s41467-019-09395-4
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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 10 Sequence Number: 1471 Start / End Page: - Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723