Femtosecond laser-based phase-change heat transfer surfaces

The femtosecond laser (FSL) is a laser processing technique that enables precise surface manipulation and even applications like graphene synthesis. Consequently, our research focuses on creating a robust and scalable heat transfer surface achievable exclusively through FSL. Our objective involves developing a hierarchical micro/nanostructure mimicking the lotus effect, aiming to achieve a surface capable of sustaining jumping/dropwise condensation even under high supersaturation levels. Furthermore, we aim to fabricate laser-induced graphene (LIG) surfaces within an atmosphere-controlled chamber to induce dropwise condensation not only for water but also for low surface tension fluids. This endeavor seeks to explore novel possibilities in heat transfer enhancement and surface engineering.