Atomic intercalation to measure adhesion of graphene on graphite
نویسندگان
چکیده
The interest in mechanical properties of two-dimensional materials has emerged in light of new device concepts taking advantage of flexing, adhesion and friction. Here we demonstrate an effective method to measure adhesion of graphene atop highly ordered pyrolytic graphite, utilizing atomic-scale 'blisters' created in the top layer by neon atom intercalates. Detailed analysis of scanning tunnelling microscopy images is used to reconstruct atomic positions and the strain map within the deformed graphene layer, and demonstrate the tip-induced subsurface translation of neon atoms. We invoke an analytical model, originally devised for graphene macroscopic deformations, to determine the graphite adhesion energy of 0.221±0.011 J m-2. This value is in excellent agreement with reported macroscopic values and our atomistic simulations. This implies mechanical properties of graphene scale down to a few-nanometre length. The simplicity of our method provides a unique opportunity to investigate the local variability of nanomechanical properties in layered materials.
منابع مشابه
The mechanism of caesium intercalation of graphene.
Properties of many layered materials, including copper- and iron-based superconductors, topological insulators, graphite and epitaxial graphene, can be manipulated by the inclusion of different atomic and molecular species between the layers via a process known as intercalation. For example, intercalation in graphite can lead to superconductivity and is crucial in the working cycle of modern ba...
متن کاملMrsec Seminar Seri Es
Graphene is a 2D material with atomic thickness and possesses unusual thermal, electrical, optical, and mechanical properties. However, those predicted, or measured, material properties could be achieved only when graphene has low defects with controlled surrounding environments. In this presentation, I will introduce two major strategies of graphene synthesis from my group; nonoxidized graphen...
متن کاملGraphene: show of adhesive strength.
G raphite is composed of layers of carbon atoms that are held together by strong covalent bonds within each graphene layer and relatively weak van der Waals forces between the layers. The mechanical properties of graphite — it is anisotropic and prone to interlayer cleavage — are closely related to the characteristics of these forces. Furthermore, according to recent work at the University of C...
متن کاملManifestation of Charged and Strained Graphene Layers in the Raman Response of Graphite Intercalation Compounds
We present detailed multifrequency resonant Raman measurements of potassium graphite intercalation compounds (GICs). From a well-controlled and consecutive in situ intercalation and high-temperature deintercalation approach the response of each stage up to stage VI is identified. The positions of the G and 2D lines as a function of staging depend on the charge transfer from K to the graphite la...
متن کاملAn Introduction to Graphene
Carbon takes its name from the latin word carbo meaning charcoal. This element is unique in that its unique electronic structure allows for hybridization to build up sp3, sp2, and sp networks and, hence, to form more known stable allotropes than any other element. The most common allotropic form of carbon is graphite which is an abundant natural mineral and together with diamond has been known ...
متن کامل