Slip flow of diverse liquids on robust superomniphobic surfaces

• A surface with robust omniphobicity was prepared.
• A variety of liquids with different surface tensions exhibited large slip length.
• The viscosity of liquids has a significant effect on boundary slip.

Water slips exist over superhydrophobic solid surfaces, but the slip flow of diverse liquids on a single surface has not been deliberately studied to date. Here, we report the slip flow behavior of a variety of liquids with different surface tensions and viscosities on a robust omniphobic surface. This surface displayed a dramatic slippage effect and thus a high drag reduction efficiency of approximately 10–20% for all liquids, depending on both liquid viscosity and surface energy. The observed liquid slip was attributed to the surface dual micro/nanostructure and the low-surface-energy coating.

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