Figure 6.

Topographies of the BSA monolayer in different kinds of physiological liquid recorded by tapping mode AFM. (a) Topography of the BSA monolayer in PBS. (b) Topography of the BSA monolayer in 50 mM sulphathiazole sodium solution. (c) Topography of the BSA monolayer in 70 mM sulphathiazole sodium solution. The scanning size is 1000 nm × 1000 nm.