| CPC B64C 1/067 (2013.01) [B32B 3/20 (2013.01); B64C 2001/0072 (2013.01); B64C 1/12 (2013.01)] | 20 Claims |

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1. A method comprising:
providing a structure having a surface;
treating a portion of the surface to modify a wettability of the portion of the structure, wherein said treating comprises superficial foam the portion; and
forming at least one liquid flow path on the surface through said treating.
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