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Dependence of 
on Bo with respect to different Young contact angles: θY=10°, θY=125° and θY=165°. Solid lines denote 
which are obtained by the force analysis; dashed lines denote 
which are obtained by the free energy analysis. The data of the setae on water strider's legs are from Feng et al. [24] and the data of the hairs on a cranefly wing and leg are from Hu et al. [12]. The inset shows a magnified view of the plot in the region of the dashed box. (Online version in colour.)
