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- W4387142861 abstract "Nano-porosity in amorphous Ge formed by swift heavy ion irradiation displays a peculiar self-organisation process. Initially almost randomly distributed pores grow with increasing irradiation fluence and segregate in layers oriented parallel to the sample surface. This self-organisation mechanism depends on the ion energy, thickness of the amorphous Ge layer and the angle of ion incidence and shows a characteristic length depending on ion energy and irradiation angle. Molecular dynamics simulations of individual ion tracks show that voids form due to the transition from the low-density amorphous to the high-density liquid phase, which also gives rise to a flow directed away from large pores and surfaces. The flow results in a characteristic distance from surfaces and larger pores below which new voids do not form and supports the formation of voids at the amorphous/crystalline interface. Simulations also demonstrate that, while direct impacts can reposition small voids, partial or nearby impacts promote their growth at the same location. These processes are plausible drivers for the self-organization." @default.
- W4387142861 created "2023-09-29" @default.
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- W4387142861 date "2023-12-01" @default.
- W4387142861 modified "2023-10-06" @default.
- W4387142861 title "Formation and self-organisation of nano-porosity in swift heavy ion irradiated amorphous Ge" @default.
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- W4387142861 doi "https://doi.org/10.1016/j.actamat.2023.119396" @default.
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