Print Email Facebook Twitter In situ methanol adsorption on aluminum oxide monitored by a combined ORP-EIS and ATR-FTIR Kretschmann setup Title In situ methanol adsorption on aluminum oxide monitored by a combined ORP-EIS and ATR-FTIR Kretschmann setup Author Pletincx, Sven (Vrije Universiteit Brussel) Fockaert, L.I. (TU Delft (OLD) MSE-6) Meeusen, M. (TU Delft (OLD) MSE-6) Mol, J.M.C. (TU Delft (OLD) MSE-6) Terryn, H.A. (Vrije Universiteit Brussel) Hauffman, Tom (Vrije Universiteit Brussel) Date 2018 Abstract A common approach to investigate chemical interactions at the polymer/metal oxide interface is by monitoring ultrathin polymer films onto a metal oxide substrate by a variety of surface analysis techniques. The deposition of this nanometer-thin overlayer is frequently carried out by reactive adsorption from dilute polymer solutions. However, the influence of the solvent on the metal oxide chemistry is seldom taken into account in interface studies. The overall amount of available adsorption sites on the metal oxide surface might decrease due to competing adsorption of the solvent and the polymer adsorbate. Therefore, in this work, the adsorption of a common organic solvent (methanol) onto a physical vapor-deposited aluminum oxide surface is monitored in situ by an integrated attenuated total reflectance Fourier transform infrared spectroscopy in the Kretschmann geometry and odd random phase multisine electrochemical impedance spectroscopy system. It is shown that methanol immediately physisorbs onto the aluminum oxide surface and replaces the initial adventitious carbon layer. This process is followed by methanol chemisorbing onto the oxide surface to form methoxide species at the liquid/solid interface. Additionally, chemisorption is validated ex situ by X-ray photoelectron spectroscopy. To reference this document use: http://resolver.tudelft.nl/uuid:bcf1b9c6-c7a1-4188-86d2-9e5af0741508 DOI https://doi.org/10.1021/acs.jpcc.8b06806 Embargo date 2019-03-04 ISSN 1932-7447 Source The Journal of Physical Chemistry C, 122 (38), 21963-21973 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2018 Sven Pletincx, L.I. Fockaert, M. Meeusen, J.M.C. Mol, H.A. Terryn, Tom Hauffman Files PDF acs.jpcc.8b06806.pdf 3.69 MB Close viewer /islandora/object/uuid:bcf1b9c6-c7a1-4188-86d2-9e5af0741508/datastream/OBJ/view