title: Wetting behavior of porous silicon surfaces functionalized with a fulleropyrrolidine.
abstract: We report the immobilization of a fulleropyrrolidine, bearing a dec-9-ynyl functionality, on silicon surfaces through a thermal hydrosilylation protocol. Contact angle measurements on porous silicon (PS) surfaces reveal an unusual dependence of the angle with the PS roughness that apparently contradicts Wenzel's formula. This result has been explained by an extension of Wenzel's model in which the critical angle, which discriminates between the hydrophilic/hydrophobic character of a solid material, is substantially reduced below 90 degrees by surface roughness.
authors.affiliation: Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy.
authors.forename: Davide
authors.initials: D
authors.lastname: Dattilo
authors.forename: Lidia
authors.initials: L
authors.lastname: Armelao
authors.forename: Michele
authors.initials: M
authors.lastname: Maggini
authors.forename: Giovanni
authors.initials: G
authors.lastname: Fois
authors.forename: Giampaolo
authors.initials: G
authors.lastname: Mistura