Chemical Identification at the Solid-Liquid Interface

Söngen H, Marutschke C, Spijker P, Holmgren E, Hermes I, Bechstein R, Klassen S, Tracey J, Foster AS, Kühnle A (2017)
Langmuir 33(1): 125-129.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
Solid-liquid interfaces are decisive for a wide range of natural and technological processes, including fields as diverse as geochemistry and environmental science as well as catalysis and corrosion protection. Dynamic atomic force microscopy nowadays provides unparalleled structural insights into solid-liquid interfaces, including the solvation structure above the surface. In contrast, chemical identification of individual interfacial atoms still remains a considerable challenge. So far, an identification of chemically alike atoms in a surface alloy has only been demonstrated under well-controlled ultrahigh vacuum conditions. In liquids, the recent advent of three-dimensional force mapping has opened the potential to discriminate between anionic and cationic surface species. However, a full chemical identification will also include the far more challenging situation of alike interfacial atoms (i.e., with the same net charge). Here we demonstrate the chemical identification capabilities of dynamic atomic force microscopy at solid-liquid interfaces by identifying Ca and Mg cations at the dolomite water interface. Analyzing site-specific vertical positions of hydration layers and comparing them with molecular dynamics simulations unambiguously unravels the minute but decisive difference in ion hydration and provides a clear means for telling calcium and magnesium ions apart. Our work, thus, demonstrates the chemical identification capabilities of dynamic AFM at the solid-liquid interface.
Erscheinungsjahr
2017
Zeitschriftentitel
Langmuir
Band
33
Ausgabe
1
Seite(n)
125-129
ISSN
0743-7463
Page URI
https://pub.uni-bielefeld.de/record/2913780

Zitieren

Söngen H, Marutschke C, Spijker P, et al. Chemical Identification at the Solid-Liquid Interface. Langmuir. 2017;33(1):125-129.
Söngen, H., Marutschke, C., Spijker, P., Holmgren, E., Hermes, I., Bechstein, R., Klassen, S., et al. (2017). Chemical Identification at the Solid-Liquid Interface. Langmuir, 33(1), 125-129. doi:10.1021/acs.langmuir.6b03814
Söngen, H., Marutschke, C., Spijker, P., Holmgren, E., Hermes, I., Bechstein, R., Klassen, S., Tracey, J., Foster, A. S., and Kühnle, A. (2017). Chemical Identification at the Solid-Liquid Interface. Langmuir 33, 125-129.
Söngen, H., et al., 2017. Chemical Identification at the Solid-Liquid Interface. Langmuir, 33(1), p 125-129.
H. Söngen, et al., “Chemical Identification at the Solid-Liquid Interface”, Langmuir, vol. 33, 2017, pp. 125-129.
Söngen, H., Marutschke, C., Spijker, P., Holmgren, E., Hermes, I., Bechstein, R., Klassen, S., Tracey, J., Foster, A.S., Kühnle, A.: Chemical Identification at the Solid-Liquid Interface. Langmuir. 33, 125-129 (2017).
Söngen, Hagen, Marutschke, Christoph, Spijker, Peter, Holmgren, Eric, Hermes, Ilka, Bechstein, Ralf, Klassen, Stefanie, Tracey, John, Foster, Adam S., and Kühnle, Angelika. “Chemical Identification at the Solid-Liquid Interface”. Langmuir 33.1 (2017): 125-129.
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2019-09-06T09:18:51Z
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