title: Wettability effect of graphene-based surfaces on silicon carbide and their influence on hydrophobicity of nanocrystalline cerium oxide films.
abstract: We investigate the water-repellent ability of graphene-based surfaces stabilized on silicon carbide (SiC) and the nanocrystalline cerium oxide (CeO2) films electrodeposited on them. Water contact angle is revealed strongly dependent on the number of graphene monolayers on SiC, indicating partial permeability of graphene on SiC. Fluctuations in the roughness of textured surfaces as well as variations of oxygen vacancy content in CeO2 electrodeposits are determinant for the hydrophobicity of the interaction between water droplets and nanocrystalline CeO2 electrodeposits on monolayers graphene on SiC.
authors.affiliation: LANSEN, Departamento de Física, Universidade Federal do Paraná, 81531-990, Caixa Postal 19044, Curitiba, Paraná, Brazil.
authors.forename: Jean C
authors.initials: JC
authors.lastname: Souza
authors.affiliation: LANSEN, Departamento de Física, Universidade Federal do Paraná, 81531-990, Caixa Postal 19044, Curitiba, Paraná, Brazil.
authors.forename: Itamar T
authors.initials: IT
authors.lastname: Neckel
authors.affiliation: LANSEN, Departamento de Física, Universidade Federal do Paraná, 81531-990, Caixa Postal 19044, Curitiba, Paraná, Brazil.
authors.forename: Jose
authors.initials: J
authors.lastname: Varalda
authors.affiliation: LANSEN, Departamento de Física, Universidade Federal do Paraná, 81531-990, Caixa Postal 19044, Curitiba, Paraná, Brazil.
authors.forename: Evaldo
authors.initials: E
authors.lastname: Ribeiro
authors.affiliation: LANSEN, Departamento de Física, Universidade Federal do Paraná, 81531-990, Caixa Postal 19044, Curitiba, Paraná, Brazil.
authors.forename: Wido H
authors.initials: WH
authors.lastname: Schreiner
authors.affiliation: LANSEN, Departamento de Física, Universidade Federal do Paraná, 81531-990, Caixa Postal 19044, Curitiba, Paraná, Brazil. Electronic address: mosca@fisica.ufpr.br.
authors.forename: Dante H
authors.initials: DH
authors.lastname: Mosca
authors.affiliation: BIOPOL, Departamento de Química, Universidade Federal do Paraná, 81531-980, Caixa Postal 19081, Curitiba, Paraná, Brazil.
authors.forename: Maria-Rita
authors.initials: MR
authors.lastname: Sierakowski
authors.affiliation: Instituto Federal de Educação, Ciência e Tecnologia do Paraná, 81531-990 Curitiba, Paraná, Brazil.
authors.forename: Vilmar
authors.initials: V
authors.lastname: Fernandes
authors.affiliation: CNRS, Laboratoire de Photonique et de Nanostructures (LPN), Route de Nozay, 91460 Marcoussis, France.
authors.forename: Abdelkarim
authors.initials: A
authors.lastname: Ouerghi
keywords: CeO(2) films; Epitaxial graphene; Hydrophobicity; Spectroscopy