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Surface wettability in terms of the height and depression of diverse microstructures and their sizes

Japanese Journal of Applied Physics, ISSN: 0021-4922, Vol: 48, Issue: 9 Part 1, Page: 0955041-0955045
2009
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Article Description

Surface wettability in terms of the height, depression, and sizes of diverse microstructures was examined. We considered three different types of microstructures: square pillars, square pores, and hexagonal pores. An increase in pore fraction causes a decrease in the contact area between a water drop and the microstructures, resulting in an increase in contact angle. It was verified that the contact angle of the square pillar microstructure is higher than those of the square pore and hexagonal pore microstructures for the same pore fraction. Of the pore-based microstructures, the square-pore microstructure has a higher contact angle than the hexagonal pore microstructure. However, it was observed that water drops were more stable with respect to pore fraction on the hexagonal pore microstructures. In addition, compared with the pillar microstructure, the pore-based microstructures exhibited more stable contact angles for different structure heights. © 2009 The Japan Society of Applied Physics.

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