Figure 6
From: Simple and effective graphene laser processing for neuron patterning application
Scanning Kelvin probe force microscopy.
Topography (a) and potential map of type 2 sample irradiated at (a, b) 0.12 J/cm2 and (c) 0.22 J/cm2; in (b) along a random horizontal line the ΔCP between pristine SLG and modified area is −98 ± 4 mV, while an increase of CPD is clearly visible all along the edges of the laser irradiation; between the blue arrows the increase is 50 ± 4 mV, compatible with a local folding of graphene layers; topography (a) cannot show any contrast. All images refer to a 20 × 40 μm2 area. In (d), plot of averaged CPD variation along X for three different irradiation powers: 0.09, 0.12, 0.22 J/cm2. Potential scale baselines (CPD SLG) have been set to zero. In (e) we plot two CPD profiles of the boundaries zones of scan (c), line 1 in black color is the left edge profile and line 2 in red color is the right edge profile as depicted in image (c).
