Title: Preparation of Reactive Three-Dimensional Microstructures via Direct Laser Writing and Thiol-ene Chemistry.
Authors: Pauloehrl, Thomas; Trouillet, Vanessa; Barner-Kowollik, Christopher; Wegener, Martin; Richter, Benjamin; Quick, Alexander S.; Fischer, Joachim
Abstract: Three-dimensional microstructures are fabricated employing the direct laser writing process and radical thiol-ene polymerization. The resin system consists of a two-photon photoinitiator and multifunctional thiols and olefins. Woodpile photonic crystals with 22 layers and a rod distance of 2 μm are fabricated. The structures are characterized via scanning electron microscopy and focused ion beam milling. The thiol-ene polymerization during fabrication is verified via infrared spectroscopy. The structures are grafted in a subsequent thiol-Michael addition reaction with different functional maleimides. The success of the grafting reaction is evaluated via laser scanning microscopy and X-ray photoelectron spectroscopy. The grafting density is calculated to be close to 200 molecules μm−2.
Subjects: DIRECT laser writing; MICROSTRUCTURE; POLYMERIZATION; X-ray photoelectron spectroscopy; MALEIMIDES; PHOTONIC crystals
Publication: Macromolecular Rapid Communications, 2013, Vol 34, Issue 4, p335
ISSN: 1022-1336
Publication type: Academic Journal
DOI: 10.1002/marc.201200796

Preparation of Reactive Three-Dimensional Microstructures via Direct Laser Writing and Thiol-ene Chemistry.

Pauloehrl, Thomas; Trouillet, Vanessa; Barner-Kowollik, Christopher; Wegener, Martin; Richter, Benjamin; Quick, Alexander S.; Fischer, Joachim