Figure 7
The Chemical force microscopy principle was applied to characterize the chemical properties of a wood cell wall. (a) The force-distance curve of the PeakForce QNM measurement displays the movement of the AFM tip in Z-position. The tip approaches the samples surface until a predefined peak force (blue line) and is attracted to a certain extent to the samples surface when the tip pulls away (red line), which is related to the adhesion forces between a (b) chemically modified tip and the (modified) wood surface.
