Self-Assembled, Ultra-Hydrophobic Micro/Nano-Textured Surfaces
Final rept. Jun-Sep 2004
ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
Pagination or Media Count:
Hierarchical self assembly of nano-scale components i.e., abalone shells, etc. has been perfected by nature, yet the ability for scientists to utilize similar techniques is still in its infancy. The assembly of complex nano- and micro-components via self organizing means, rather than serial or parallel processing methods e.g., electron beam lithography or nano-imprinting, respectively, could exploit the inherent benefit of these entities in a more elegant, economic means. The self assembly of regular arrays of nano- and microscale pores in polymer matrices, generated by so-called breath figures, will be discussed. Experimental parameters to vary the size, spacing, organization, long-range order, etc., of these selforganizing surfaces will also be discussed. Utilizing these regular arrays of pores as templates, we have patterned analogous arrays of pillars inverse pores from a polymer film cast onto the patterned surface. These micro-nano-textured surfaces have greatly enhanced the hydrophobicity of the textured polymer when measured by contact angle. This method of producing ultrahydrophobic textured surfaces should be amenable to high-throughput, low-cost manufacturing of myriad polymeric surfaces.
- Physical Chemistry