• Trouillet, Vanessa
• Heissler, Stefan
• Gliemann, Hartmut
• Walheim, Stefan
• Welle, Alexander
• Berson, Jonathan
• Schimmel, Thomas
• Meier, Michael
• Lindemann, Peter
• Fuchise, Keita

Abstract

(Figure Presented). The preparation of cross-linked nanosheets with 1-2 nm thickness and predefined shape was achieved by lithographic immobilization of trimethacryloyl thioalkanoates onto the surface of Si wafers, which were functionalized with 2-(phenacylthio)acetamido groups via a photoinduced reaction. Subsequent cross-linking via free radical polymerization as well as a phototriggered Diels-Alder reaction under mild conditions on the surface led to the desired nanosheets. Electrospray ionization mass spectrometry (ESI-MS), X-ray photoelectron spectroscopy (XPS), time-of-flight secondary ion mass spectrometry (ToF-SIMS), as well as infrared reflection-absorption spectroscopy (IRRAS) confirmed the success of individual surface-modification and cross-linking reactions. The thickness and lateral size of the cross-linked structures were determined by atomic force microscopy (AFM) for samples prepared on Si wafers functionalized with a self-assembled monolayer of 1H,1H,2H,2H-perfluorodecyl groups bearing circular pores obtained via a polymer blend lithographic approach, which led to the cross-linking reactions occurring in circular nanoareas (diameter of 50-640 nm) yielding an average thickness of 1.2 nm (radical cross-linking), 1.8 nm (radical cross-linking in the presence of 2,2,2-trifluoroethyl methacrylate as a comonomer), and 1.1 nm (photochemical cross-linking) of the nanosheets. © 2015 American Chemical Society.

Topics

• pore
• surface
• x-ray photoelectron spectroscopy
• atomic force microscopy
• spectrometry
• selective ion monitoring
• secondary ion mass spectrometry
• infrared reflection absorption spectroscopy
• polymer blend
• electrospray ionisation
• electrospray ionisation mass spectrometry