title: Quasi-2D Cu2 S crystals on graphene: in-situ growth and ab-initio calculations.
abstract: Two-dimensional crystals of beta-copper sulfide are synthesized in an in-situ electron microscopy experiment. Copper crystals are deposited on an amorphous carbon film containing sulfur. The carbon film graphitizes upon heating and electron irradiation and allows the reaction of Cu and S towards two-dimensional Cu(2) S crystals. These are energetically favourable and bonded via van der Waals interactions to the graphitic substrate.
authors.affiliation: Institut de Physique et Chimie des Matériaux UMR 7504 CNRS, Université de Strasbourg, 23 rue du Loess, 67034, Strasbourg, France.
authors.forename: Ferdaous Ben
authors.initials: FB
authors.lastname: Romdhane
authors.forename: Ovidiu
authors.initials: O
authors.lastname: Cretu
authors.forename: Lamjed
authors.initials: L
authors.lastname: Debbichi
authors.forename: Olle
authors.initials: O
authors.lastname: Eriksson
authors.forename: Sébastien
authors.initials: S
authors.lastname: Lebègue
authors.forename: Florian
authors.initials: F
authors.lastname: Banhart
keywords: copper sulfide; electron microscopy; layered materials; two-dimensional materials