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- W3015390123 abstract "Surface-diffusion mediated solid-state dewetting has been observed and studied in a number of different systems during the past two decades. This process can be accompanied by the pinching of the film at a finite distance from the retracting triple line. The repetition of this pinching is often referred to as periodic mass shedding. We show that the disjoining pressure of the film can accelerate mass shedding by orders of magnitude in ultrathin films with nanometric thickness. In the presence of power-law disjoining pressures induced by van der Waals forces, the mass shedding time exhibits an approximate power-law dependence on film thickness ${t}_{mathrm{ms}}ensuremath{sim}{overline{h}}^{ensuremath{nu}}$, with $ensuremath{nu}ensuremath{approx}6$. Exponentially decaying disjoining forces also give rise to a strong acceleration of mass shedding. However, due to the finite range of the exponential potential, the mass shedding time does not exhibit a simple power-law dependence on the thickness, and is controlled by a cutoff thickness. In addition, two-dimensional simulations indicate that, within the range of thicknesses that we have studied and for isotropic dynamics, the transversal instability of a straight front does not lead to fingering, and mass shedding is the dominant instability of the dewetting front. Finally, we also show that no significant difference is observed in the dewetting dynamics between simulations based on a model with a wetting potential integrated over the film surface area, or over the projected substrate area." @default.
- W3015390123 created "2020-04-17" @default.
- W3015390123 creator A5039028764 @default.
- W3015390123 creator A5056937615 @default.
- W3015390123 date "2020-04-06" @default.
- W3015390123 modified "2023-09-25" @default.
- W3015390123 title "Disjoining-pressure-induced acceleration of mass shedding in solid-state dewetting" @default.
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- W3015390123 doi "https://doi.org/10.1103/physreve.101.042802" @default.
- W3015390123 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32422706" @default.
- W3015390123 hasPublicationYear "2020" @default.
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