Defect-induced wetting on BaF<inf>2</inf>(111) and CaF<inf>2</inf>(111) at ambient conditions

M. Cardellach, A. Verdaguer, J. Fraxedas

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    13 Citations (Scopus)

    Abstract

    The 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.
    Original languageEnglish
    Pages (from-to)1929-1933
    JournalSurface Science
    Volume605
    Issue number23-24
    DOIs
    Publication statusPublished - 1 Jan 2011

    Keywords

    • Scanning force microscopy
    • Water-surface interactions
    • Wetting

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