Preparation of reactive three-dimensional microstructures via direct laser writing and thiol-ene chemistry.
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) .
Preparative Macromolecular Chemistry, Institut für Technische Chemie und Polymerchemie and Center for Functional Nanostructures, Karlsruhe Institute of Technology, Germany.
Alexander S
AS
Quick
Joachim
J
Fischer
Benjamin
B
Richter
Thomas
T
Pauloehrl
Vanessa
V
Trouillet
Martin
M
Wegener
Christopher
C
Barner-Kowollik
D000475:Alkenes / Q000737:chemistry; D007834:Lasers; D008855:Microscopy, Electron, Scanning; D056951:Photoelectron Spectroscopy; D058105:Polymerization; D013438:Sulfhydryl Compounds / Q000737:chemistry*
D000475:Alkenes; D013438:Sulfhydryl Compounds