Ultrathin films of dielectric materials supported on a metal are becoming increasingly interesting for their peculiar and unprecedented properties. One important aspect is that usually two-dimensional materials are much more flexible and easy to structurally modify than the corresponding bulk counterparts. In this paper we discuss this phenomenon with particular attention to its relevance for the adsorption properties of the films. For instance, formation of charged adsorbates is accompanied by substantial local relaxations of the support that are reminiscent of the formation of polarons in dielectric crystals to screen localized charges.
Pacchioni, G. (2016). Role of structural flexibility on the physical and chemical properties of metal-supported oxide ultrathin films. In F.P. Netzer, A. Fortunelli (a cura di), Oxide Materials at the Two-Dimensional Limit (pp. 91-118). Springer Verlag [10.1007/978-3-319-28332-6_3].
Role of structural flexibility on the physical and chemical properties of metal-supported oxide ultrathin films
PACCHIONI, GIANFRANCO
2016
Abstract
Ultrathin films of dielectric materials supported on a metal are becoming increasingly interesting for their peculiar and unprecedented properties. One important aspect is that usually two-dimensional materials are much more flexible and easy to structurally modify than the corresponding bulk counterparts. In this paper we discuss this phenomenon with particular attention to its relevance for the adsorption properties of the films. For instance, formation of charged adsorbates is accompanied by substantial local relaxations of the support that are reminiscent of the formation of polarons in dielectric crystals to screen localized charges.
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