Figure 3
From: Simple and effective graphene laser processing for neuron patterning application
(a) Fluorescence and (b) reflection images of exposed SLG on SiO2/Si.
Fluence values used on each stripe are indicated. In (a), the fluorescence intensity counts along the white profile (averaged) has been superimposed on the fluorescence image. Single pulse laser damage threshold at 0.12 ± 0.06 J/cm2 is identified in both images. To obtain fluorescence quenching, fluorescein dye dispersed in PVP was spin coated on the sample. Counts drop by 10% (red markers) above the damage threshold. Complete ablation occurs at higher fluencies (0.4–0.5 J/cm2), data not shown. In (c) and (d), optical microscope images of SLG on glass after machining. For SLG on glass substrate a LDT ≈ 0.50 J/cm2 is found.
