Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 42: Poster Tuesday: Organic Molecules on Inorganic Surfaces
O 42.4: Poster
Dienstag, 2. April 2019, 18:00–20:00, Poster D
Promoted exchange reaction between alkanethiolate self-assembled monolayers and an azide-bearing substituent — Rui Yan1, Loïc Le Pleux2, Marcel Mayor2,3, and •Michael Zharnikov1 — 1Applied Physical Chemistry, Heidelberg University, 69120 Heidelberg, Germany — 2University of Basel, Department of Chemistry, CH-4056 Basel, Switzerland — 3Forschungszentrum Karlsruhe GmbH, Institute for Nanotechnology, 76021 Karlsruhe, Germany
The possibility of ultraviolet-light-promoted exchange reaction between the primary alkanethiolate (AT) self-assembled monolayers (SAM) and an azide-functionalized substituent (12-Azido-1-dodecanethiol, C12N3), capable of click reaction with ethynyl-bearing species, is demonstrated. This reaction resulted in the mixed AT/C12N3 films, with the portion of C12N3 precisely controlled by selection of a suitable UV dose. As the primary matrix, either non-substituted or oligo(ethylene glucole) (OEG) substituted AT SAMs were used, targeting mixed SAMs of chemical and biological significance. The surface density of the chemically active azide groups embedded in the non-reactive primary matrix could be precisely varied. For the OEG-AT/C12N3 films, this resulted in the preparation of templates for specific protein adsorption, comprising biotin-bearing moieties embedded in the protein-repelling OEG-AT matrix. The entire approach was extended to lithography, relying on a commercial maskless UV lithography setup.