Graphene interactions by displacement-controlled nanoindentation

Abstract eng:
In this paper, we examine the adhesive interactions between a diamond indenter and mono-, bi- and trilayer graphene on silicon oxide. Nanoindentation experiments were also conducted on bare silicon oxide and highly ordered pyrolytic graphite (HOPG) as controls. Force profiles obtained under displacement control revealed the complete adhesive interactions during approach and withdrawal. The strength, range and energy of the underlying interactions between the tip and the contact surface in addition to those between graphene and silicon were extracted by an inverse, numerical analysis at the continuum level. There was evidence of both Van der Waals and capillary forces and graphene did appear to screen interactions between the probe and silicon oxide.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket