Figure 2.

Contact and sliding angles of water droplets on CNTs/Si and CNTs/Si-μp. Contact angles of water droplets on (a) CNTs/Si and (b) CNTs/Si-μp. Sliding angles of water droplets on (c) CNTs/Si and (d) CNTs/Si-μp. The volume of water droplets is 7 μL.

He et al. Nanoscale Research Letters 2013 8:412   doi:10.1186/1556-276X-8-412
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