Figure 15.

(a) Tapping mode image of cellulose isolated from switch-grass; (b) topographic image of switch-grass cellulose obtained in force-volume mode; (c) adhesion force image of switch-grass cellulose obtained in force-volume mode; (d) tapping mode image of extractives-free switch-grass; (e) topographic image of extractives-free switch-grass obtained in force-volume mode; (f) adhesion force image of extractives-free switch-grass obtained in force-volume mode; (g) a false color scheme based on the calibrations used for the depiction of the adhesion forces [222]. (Reprinted with permission from Lee et al., 2015.)