Tunable hydrophobicity on fractal and micro-nanoscale hierarchical fracture surface of metallic glasses

Abstract A series of fractal, hierarchical fracture surfaces with a tunable hydrophobicity were designed and fabricated by simply three-point bending of metallic glasses (MGs) with different annealing treatments. We microscopically analyzed the structures of the fracture morphology on various fracture surfaces by scanning electron microscope and atomic force microscope, and find that the tunable hydrophobicity originates from the intrinsic micro-nanoscale hierarchical, two-level fractal fracture micro-structures in MGs. Our results may provide a strategy to fabricate the tunable wetting surface with combination of the excellent mechanical properties in MGs.

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