Figure 8
From: Simple and effective graphene laser processing for neuron patterning application
Presence of adhesion promoter (Polylysine).
(a) Fluorescence microscopy detail of an etched area proving that FITC-PLL is distributed on patterned and un-patterned graphene (image contrast was enhanced to improve visibility). (b) AFM topography of the border area (square detail in white) showing the different arrangement of Polylysine once adsorbed on glass (left) or on SLG (right). Polylysine on graphene forms a film (~4 nm) thicker than that found on bare glass. (c) height profile along the white line in (b). (d) Phase image of the same area. Phase contrast is minimal, indicating no significant compositional difference between the two surfaces.
