Within the frame of the Reinhart Koselleck program of the DFG (German research foundation), different strategies for the development of large-area, multiscale surface structures with multifunctional properties using laser-based fabrication methods were developed. The primary objectives were to create advanced fabrication techniques for producing hierarchical surface patterns, implement in-situ monitoring systems, and understand the relationship between surface topography and functionality.

Initial efforts concentrated on analyzing how surface structure and chemistry affect functionalities such as wettability and ice-repellency. By combining laser techniques to produce periodic patterns at different length scales, multifunctional surfaces were fabricated on metal and polymer substrates. Key achievements included the development of superhydrophobic, ice-repellent, and low-bacterial-adhesion surfaces. An optical unit was also designed, integrating Direct Laser Interference Patterning (DLIP) and Direct Laser Writing (DLW).

Additionally, an in-line monitoring system was developed to detect surface defects during laser processing in real time. Further work explored additional surface functionalities, such as enhanced oil repellency, decorative properties, and improved optical absorption and corrosion resistance on metallic surfaces. Laser fabrication throughput was increased through technology improvements, including the integration of polygon scanning with DLIP. The project successfully met its objectives, contributing to advancements in surface functionalization and laser manufacturing.