Graphene
[Summary] Graphene is a two-dimensional crystal, arranged by carbon atoms in hexagons, connected to each other, forming a carbon molecule, and its structure is very stable. The monolayer graphene has only one carbon atom thickness, i.e. 0.335 nanometers, which is equivalent to one-200,000th of a hair. Therefore, CAFM is often used in the process to detect the presence of extremely thin graphene and characterize its electrical properties.
Using CAFM image RL0and RL1The slope of the resistance between the two layers of graphene can be approximated.
Using contrast of the contrast of the CAFM current distribution map (left image) to find the extremely thin multilayer graphene (MLG) components covering the substrate that were not completely found in the BSE-SEM map (right image) at the same position.
