Dresden 2011 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 9: Poster: Biopolymers and Biomaterials
CPP 9.10: Poster
Montag, 14. März 2011, 17:30–19:30, P2
Influence of Pulse Duration on the Polymerization Characteristic of Photosensitive Polymers and Biomolecules by Multiphoton Polymerization — •Andreas Omenzetter1, Sascha Engelhardt1, Martin Wehner2, and Arnold Gillner2 — 1Lehrstuhl für Lasertechnik, RWTH, Steinbachstraße 15, Aachen — 2Fraunhofer-Institut für Lasertechnik, Steinbachstraße 15, Aachen
High resolution 3D microstructures are of great interest for various applications. These structures may prove beneficial in the field of tissue engineering. Here cells, biomaterials and polymers are combined in order to replace or improve biological tissue.
We use the technique of multiphoton polymerization (MPP) which allows polymerization of a prepolymeric resin in a very confined area. For this process very high photon densities are necessary making the use of highly focused pulsed laser radiation crucial. The probability for MPP is much higher in the focal volume than in the surrounding area. That makes it possible to generate microstructures with a resolution of about 100 nm and less.
We have focused our work on the influence of laser pulse-duration on the size of the smallest possible structures, called voxels (volume pixel). For this reason we compare the influence of different laser sources with different pulse durations on voxel formation. The main advantage of longer pulses are the lower technical preconditions and thus a possibility of a turn-key machine. This will lower costs and may result in an upscaling of the otherwise slow MPP process by parallelization.