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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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 Creators:
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
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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