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Defect-induced wetting on BaF2(111) and CaF2(111) at ambient conditions

AuthorsCardellach, Mar ; Verdaguer, Albert ; Fraxedas, J.
Issue Date2011
CitationSurface Science 605: 1929-1933 (2011)
AbstractThe interaction of water with freshly cleaved (111) surfaces of isostructural BaF2 and CaF2 single crystals at ambient conditions (room temperature and under controlled humidity) has been studied using scanning force microscopy in different operation modes and optical microscopy. Such surfaces exhibit contrasting behaviors for both materials: while on BaF2(111) two-dimensional water layers are formed after accumulation at step edges, CaF2(111) does not promote the formation of such layers. We attribute such opposed behavior to lattice match (mismatch) between hexagonal water ice and the hexagonal (111) surfaces of BaF 2(CaF2). Optical microscope images reveal that this behavior also determines the way the surfaces become wetted at a macroscopic level. © 2011 Elsevier B.V. All rights reserved.
Identifiersdoi: 10.1016/j.susc.2011.07.003
issn: 0039-6028
Appears in Collections:(CIN2) Artículos
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