3 years ago

Direct Observation of “Pac-Man” Coarsening

Direct Observation of “Pac-Man” Coarsening
A. Gulec, X. X. Yu, P. W. Voorhees, J. M. Zuo, L. D. Marks, A. Yoon
We report direct observation of a “Pac-Man” like coarsening mechanism of a self-supporting thin film of nickel oxide. The ultrathin film has an intrinsic morphological instability due to surface stress leading to the development of local thicker regions at step edges. Density functional theory calculations and continuum modeling of the elastic instability support the model for the process.

Publisher URL: http://dx.doi.org/10.1021/acs.nanolett.7b01137

DOI: 10.1021/acs.nanolett.7b01137

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