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RESEARCH PRODUCT
Surface-Specific Spectroscopy of Water at a Potentiostatically Controlled Supported Graphene Monolayer
Klaus MüllenKlaus MüllenEllen H. G. BackusEllen H. G. BackusM.-j. Van ZadelKlaas-jan TielrooijZhaoyang LiuMischa BonnAkimitsu NaritaLisa B. Dreiersubject
Materials science02 engineering and technologySubstrate (electronics)010402 general chemistryElectrochemistry01 natural sciencesArticlelaw.inventionMembrane biophysicslawSum-frequency generation spectroscopyMoleculePhysical and Theoretical ChemistrySpectroscopyWater interfaceInterfacial water structureGrapheneGraphene layersInterfacial water molecules021001 nanoscience & nanotechnologyChemical vapor deposited3. Good health0104 chemical sciencesSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsGeneral EnergyChemical engineeringAtmospheric chemistry0210 nano-technologyMembrane biophysicsLayer (electronics)Potential dependencedescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-10-03 | The Journal of Physical Chemistry. C, Nanomaterials and Interfaces |