AIP Advances (Sep 2019)
Wetting transition on heated microstructrured superhydrophobic surface
Abstract
Superhydrophobic surface has attracted significant attention since their potentiality to industrial and academic applications. Moreover, superhydrophobic surface wettability at non-ambient temperature, especially at high temperature (but not boiling) was of great importance in many industrial processes. In this paper, we designed and fabricated 4 series superhydrophobic micro-pillar surfaces on the Silicon wafers to investigate wettability at different temperatures. These micro-pillar surfaces were fabricated by photolithography and ICP etching technologies. The temperature-dependent wettability of DI water droplets was characterized using contact angle measurements. The wetting behavior was observed to be different on the surfaces, and the wetting transition occurred at a specific temperature.