title: Adsorption Studies of Organophosphonic Acids on Differently Activated Gold Surfaces.
abstract: In this study, the formation of self-assembled monolayers consisting of three organophosphonic acids (vinyl-, octyl-, and tetradecylphosphonic acid) from isopropanol solutions onto differently activated gold surfaces is studied in situ and in real time using multiparameter surface plasmon resonance (MP-SPR). Data retrieved from MP-SPR measurements revealed similar adsorption kinetics for all investigated organophosphonic acids (PA). The layer thickness of the immobilized PA is in the range of 0.6-1.8 nm corresponding to monolayer-like coverage and correlates with the length of the hydrocarbon chain of the PA molecules. After sintering the surfaces, the PA are irreversibly attached onto the surfaces as proven by X-ray photoelectron spectroscopy and attenuated total reflection infrared and grazing incidence infrared spectroscopy. Potential adsorption modes and interaction mechanisms are proposed.
authors.affiliation: Institute for Chemistry and Technology of Materials, Graz University of Technology , Stremayrgasse 9, 8010 Graz, Austria.
authors.forename: Katrin
authors.initials: K
authors.lastname: Niegelhell
authors.affiliation: Institute for Chemistry and Technology of Materials, Graz University of Technology , Stremayrgasse 9, 8010 Graz, Austria.|Polymer Competence Center Leoben GmbH , Roseggerstraße 12, 8700 Leoben, Austria.
authors.forename: Simon
authors.initials: S
authors.lastname: Leimgruber
authors.affiliation: Institute for Polymer Chemistry, University of Leoben , Otto Glöckel-Straße 2/IV, 8700 Leoben, Austria.
authors.forename: Thomas
authors.initials: T
authors.lastname: Grießer
authors.affiliation: Institute for Electron Microscopy and Nanoanalysis, Graz University of Technology , Steyrergasse 17, 8010 Graz, Austria.
authors.forename: Christian
authors.initials: C
authors.lastname: Brandl
authors.affiliation: Institute for Electron Microscopy and Nanoanalysis, Graz University of Technology , Steyrergasse 17, 8010 Graz, Austria.
authors.forename: Boril
authors.initials: B
authors.lastname: Chernev
authors.affiliation: Institute of Solid State Physics, Graz University of Technology , Petersgasse 16/II, 8010 Graz, Austria.
authors.forename: Robert
authors.initials: R
authors.lastname: Schennach
authors.affiliation: Institute for Chemistry and Technology of Materials, Graz University of Technology , Stremayrgasse 9, 8010 Graz, Austria.
authors.forename: Gregor
authors.initials: G
authors.lastname: Trimmel
authors.affiliation: Institute for Chemistry and Technology of Materials, Graz University of Technology , Stremayrgasse 9, 8010 Graz, Austria.
authors.forename: Stefan
authors.initials: S
authors.lastname: Spirk