Fabrication of a poly(dimethylsiloxane) microstructured surface imprinted from patterned silicon wafer with a self-cleaning property

Microrod patterns were fabricated on PDMS sheets utilizing porous siliconwafers as templates. The prepared microrod PDMS surface showed high water and oil contact angles. To discuss the mechanism, theoretical contact angleswere calculated utilizing Wenzel model and Cassie-Baxter model, and compared with the measured values. Furthermore, it was confirmed that the microrod PDMS surface has self-cleaning property.