Figure 1
From: Graphene-coated microballs for a hyper-sensitive vacuum sensor
A graphic summary of the experimental concept. (a) A comparison of the sensing area of 2D (square) versus 3D (cube) sensors. (b) Theoretical number of single-ball sensors prepared from 1 g of balls with a diameter of 10 μm. (c) Illustration of how an RGO sheet is attached to the surface of a PMMA microball.
