Figure 8.

Nanosensing application in food packaging. Schematic representation of the enzymatic microlithography process with (B) the resulting Atomic Force Microscopy (AFM) topographic image of the patterned Poly-L-Lysine (PLL) surface (scale: 5 μm) and line profile of the corresponding AFM image. (C) Patterning process of multilayered thin films composed of pectin and PLL. When the stamp is applied on the film, only the top layer is patterned, which allows the formation of alternate positive and negative lines highlighted by further site-selective adsorption of cationic polymer [93].