Large Scale Surface Structuring by Micro and Nanoreplication Processes

PD Dr. Matthias Worgull [Contact]

Our research is focussed to the development of enhanced micro- and nanoreplication processes with the aim to generate smart large scale surfaces based on a large diversity of materials. For this we use polymer structuring processes like hot embossing, nanoimprint, thermoforming and continuous roll-to-roll replication. These processes will be technically modified and adapted to the requirements of the desired applications, like optical components for photonics, biomimetic surfaces or microfluidic applications. For this we use a large diversity of replication materials, starting with all kinds of thermoplastic polymers, up to high performance material like glass, metallic glass or selected metals. A new focus is set to smart materials especially shape memory polymers. These polymers are used to replicate 3-dimensional structures in the micron and submicron range on large surfaces. The advantage of this kind of structure generation compare to other sequential structuring techniques is the integration of cost efficient replication technologies. To increase the structured areas beyond typical wafer scale areas we also focus our research on microstructuring by roll-to-roll technologies including the fabrication of the microstructured molds. Here we developed a process chain including lithography and electroplating of seamless microstructured sleeves. Our processes and support is also available for external user by the KNMFi – the Karlsruhe Nano Micro Facility for Information-driven Material Structuring and Characterisation.

Smart surfaces - nanostructures in shape memory polymers