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(a) Hydrodynamic force with high driving velocity (77 μm/s) on a silicon surface and an OTS surface in DI water with different positive voltages applied to the substrate, (b) V/Fhydro with high driving velocity (77 μm/s) on a silicon surface and an OTS surface in DI water with different positive voltages applied to the substrate. Reproduced with permission from [94]. Copyright (2013) Elsevier.
