레이저 선택적 증착을 통한 이방특성의 소수성 표면처리

Surfaces with various roughnesses were produced through laser processing, and the anisotropy andhydrophobicity of the surfaces were examined in the context of the microstructures. The fine particlestransferred to the glass surface exhibited different sizes, and the roughness increased. Due to the change inthe roughness, the liquid could not penetrate the space between the fine particles, and it was thus exposedto the air. We analyzed this phenomenon using the combined Wenzel and Cassie–Baxter models. Excessivefine particle formation on the substrate tended to increase the roughness and surface energy. The silver–glass–air contact analysis could clarify the mechanism of the reduction of the contact angle and differences in themetastable and stable states when the particles did not completely cover the glass substrate. The formation ofmicrostructures with fine particles through the laser selective deposition led to the generation of ananisotropic surface as the water droplets diffused toward the glass substrate with a relatively high surfaceenergy level.