Atomic-scale mapping of hydrophobic layers on graphene and few-layer MoS₂ and WSe₂ in water.

ABSTRACT: The structure and the role of the interfacial water in mediating the interactions of extended hydrophobic surfaces are not well understood. Two-dimensional materials provide a variety of large and atomically flat hydrophobic surfaces to facilitate our understanding of hydrophobic interactions. The angstrom resolution capabilities of three-dimensional AFM are exploited to image the interfacial water organization on graphene, few-layer MoS₂ and few-layer WSe₂. Those interfaces are characterized by the existence of a 2 nm thick region above the solid surface where the liquid density oscillates. The distances between adjacent layers for graphene, few-layer MoS₂ and WSe₂ are ~0.50 nm. This value is larger than the one predicted and measured for water

SUBMITTER: Uhlig MR 

PROVIDER: S-EPMC6565678 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature