Surface-Specific Spectroscopy of Water at a Potentiostatically Controlled Supported Graphene Monolayer
Dreier, L. B. (Graduate School Materials Science in Mainz)
Liu, Z. (Max Planck Institute for Polymer Research)
Narita, Akimitsu (Max Planck Institute for Polymer Research)
Van Zadel, M. J. (Max Planck Institute for Polymer Research)
Müllen, Klaus (Johannes Gutenberg-Universität Mainz)
Tielrooij, Klaas-Jan (Institut Català de Nanociència i Nanotecnologia)
Backus, Ellen H. G. (University of Vienna. Department of Physical Chemistry)
Bonn, Mischa (Max Planck Institute for Polymer Research)

Date:	2019
Abstract:	Knowledge of the structure of interfacial water molecules at electrified solid materials is the first step toward a better understanding of important processes at such surfaces, in, e. g. , electrochemistry, atmospheric chemistry, and membrane biophysics. As graphene is an interesting material with multiple potential applications such as in transistors or sensors, we specifically investigate the graphene-water interface. We use sum-frequency generation spectroscopy to investigate the pH- and potential-dependence of the interfacial water structure in contact with a chemical vapor deposited (CVD) grown graphene surface. Our results show that the SFG signal from the interfacial water molecules at the graphene layer is dominated by the underlying substrate and that there are water molecules between the graphene and the (hydrophilic) supporting substrate.
Grants:	European Commission 336679 Ministerio de Economía y Competitividad SEV-2017-0706
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Chemical vapor deposited ; Graphene layers ; Interfacial water molecules ; Interfacial water structure ; Membrane biophysics ; Potential dependence ; Sum-frequency generation spectroscopy ; Water interface
Published in:	Journal of physical chemistry. C, Vol. 123, Issue 39 (October 2019) , p. 24031-24038, ISSN 1932-7455

DOI: 10.1021/acs.jpcc.9b05844
PMID: 31602283

8 p, 4.4 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles