Fig. 4. (a) 3-D view of the glue tip showing fine kaolinite clusters trapped at and around the tip apex, (b, d and g), inset from (a) showing height, deformation and adhesion channels, respectively, of an area at the kaolinite–glue interface, (c and e) sections of height, deformation channels, respectively, (f) Z extension of kaolinite cluster (yellow, red and orange lines in (a)) at the top of the glue, and (h) an imaginary series showing the influence of the kaolinite edge on the spatial resolution of the SNL characterizer (the dilation L is indicated by the golden arrow).
