<div class="csl-bib-body">
<div class="csl-entry">Lezuo, L., Conti, A., Abart, R., Mittendorfer, F., Schmid, M., Diebold, U., & Franceschi, G. (2024, March 20). <i>Atomic-scale imaging of K-feldspar surfaces and their interaction with water</i> [Conference Presentation]. 87. Jahrestagung der DPG und DPG-Frühjahrstagung, Berlin, Germany.</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/196029
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dc.description.abstract
K-Feldspars (KAlSi3O8) are common minerals in the Earth’s crust and play a crucial role as ice nucleators in atmospheric processes. In particular, the well-ordered low-temperature polymorph microcline is a very effective ice nucleator.[1] Understanding their interaction with water is essential for various scientific fields, including atmospheric chemistry and climate science.
This study presents experimental atomic-scale imaging of the interaction between K-feldspar and water.[2] We cleaved the mineral in ultra-high vacuum and analyzed the surface using non-contact atomic force microscopy (AFM) and X-ray photoelectron spectroscopy. The surfaces are prone to hydroxylation, exposing arrays of silanol (Si-OH) and aluminol (Al-OH) groups. We studied the onset of ice nucleation by introducing H2O vapor at low temperatures on such hydroxylated surfaces. Ab-initio calculations in tandem with AFM simulations employing the Probe Particle Model [3] helped us interpret our results.
en
dc.language.iso
en
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dc.subject
Surface Physics
en
dc.title
Atomic-scale imaging of K-feldspar surfaces and their interaction with water