Fig. 3: Atomic force microscopy (AFM) characterization of membranes.
From: Sensitive capacitive pressure sensors based on graphene membrane arrays
a AFM tapping mode image of DLG drums. The state of the drum is labeled. Scale bar: \(5\) \(\mu\)m. b AFM tapping mode image of a supported region of DLG. Residue types are indicated. Scale bar: \(1\) \(\mu\)m. c Force versus membrane deflection curve. Experimental data (blue dots) are fit by the membrane model of Eq. (2). Inset: statistics over 21 membranes with the corresponding mean values for the extracted two-dimensional Young’s modulus, \(E_{2{\mathrm{D}}}\), with a mean pretension \(n_0 = 0.04 \pm 0.02\) N/m
