Figure 5
From: Imaging in Biologically-Relevant Environments with AFM Using Stiff qPlus Sensors

FM-AFM images in quasi-constant height mode (defined in the text) of muscovite mica in different environments. (a) Image taken in ambient conditions with Δf = +257 Hz and A = 78 pm. A possible lattice configuration of muscovite mica is overlaid. (b) Image taken in H2O with Δf = +20 Hz and A = 210 pm. (c) Image taken in HAM culture medium with Δf = +330 Hz and A = 112 pm. (d) Image taken in Tris-HCl buffer with Δf = +100 Hz and A = 100 pm.