Preparation of reactive three-dimensional microstructures via direct laser writing and thiol-ene chemistry

Quick, A. S., Fischer, J., Richter, B., Pauloehrl, T., Trouillet, V., Wegener, M., & Barner-Kowollik, C. (2013) Preparation of reactive three-dimensional microstructures via direct laser writing and thiol-ene chemistry. Macromolecular Rapid Communications, 34(4).

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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. Reactive 3D microstructures are fabricated by two-photon direct laser writing of a tetra-functional thiol with a tetra-functional allyl ether via radical thiol-ene polymerization, expressing residual thiol functionalities on the surface of the structure. These functionalities can be readily addressed by thiol-Michael addition reactions, evidenced by fluorescence microscopy and X-ray photoelectron spectroscopy. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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22 citations in Web of Science®

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ID Code: 99361
Item Type: Journal Article
Refereed: Yes
Additional Information: Cited By :19
Export Date: 5 September 2016
CODEN: MRCOE
Correspondence Address: Wegener, M.; Preparative Macromolecular Chemistry, Polymerchemie and Center for Functional Nanostructures, Karlsruhe Institute of Technology (KIT), Engesserstraße 18, 76131 Karlsruhe, Germany; email: martin.wegener@kit.edu
Chemicals/CAS: thiol derivative, 13940-21-1; Alkenes; Sulfhydryl Compounds
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Keywords: direct laser writing, surface functionalization, thiol-ene chemistry, 3D microstructures, Allyl ethers, Focused ion beam milling, Grafting densities, Grafting reactions, Laser scanning microscopy, Maleimides, Photo-initiator, Resin systems, Thiol-ene chemistries, Thiol-ene polymerizations, Three-dimensional microstructures, Two photon, Addition reactions, Ethers, Fabrication, Fluorescence microscopy, Infrared spectroscopy, Metallographic microstructure, Olefins, Photoelectrons, Photons, Polymerization, Scanning electron microscopy, X ray photoelectron spectroscopy, Grafting (chemical), alkene, thiol derivative, article, chemistry, laser, Alkenes, Lasers, Microscopy, Electron, Scanning, Photoelectron Spectroscopy, Sulfhydryl Compounds
DOI: 10.1002/marc.201200796
ISSN: 10221336
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 22 Sep 2016 04:50
Last Modified: 30 Sep 2016 00:21

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