3D functional integration using radiation-based polymer modification and high-resolution polymer composite direct 3D printing
- 13:00 - 14:30
- Dr.-Ing. Robert Kirchner
- Head Mesoscopic 3D Systems, TU Dresden
Abstract Fully integrating functionalities like plasmonics or electronics into freeform 3D objects is challenging, given the available technologies, and especially when targeting industrial high-volume fabrication. We are developing solutions along two fundamentally different strategies. For the first, we start with planar structures and use out-of-plane rotation and translation to create compact and functional 3D objects. Such micro origami or kirigami techniques are the focus of academic research since a long time. They are of particular interest for us for 3D micro-nano-fabrication for MEMS, microfluidics, drug-delivery and smart-dust concepts. The major advantage is the usage of established planar lithography techniques. That means, the initial 2D structure can be fabricated with very high resolution, accurate placement, high-throughput and in a large set of different materials. I will discuss a new kirigami actuation concept deliberately controlling the viscoelastic creep and viscous reflow of linear thermoplastic polymers. I will shortly introduce our advanced surface patterning of 3D silica reliefs and of angle insensitive plasmonic structures for optically functional 3D objects. The second strategy focuses on sub-micrometer high-resolution 3D printing using multi-photon laser absorption. While the physical principle allows for lateral features below 100 nm, the variety of materials to be processed is limited for several reasons. I will present recent developments in modifying single-constituent materials based on spatially controlling the laser exposure. In addition, we are developing a new technology for efficient in-situ material replacement at the optical focus of the multi-photon laser writing system. That truly enables the route towards true freeform multi-material processing. The seminar is an overview on recent work to introduce our group and to look for potential mutual interests.
Letztmalig verändert: 09.03.2021, 00:10:43
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