Figure 3.

AFM height images of C20A film structures spin coated from methanol and m-cresol with different methanol to m-cresol volume ratios. The image on the right is an image with higher resolution than the one to the left. The z range is 5 nm for ae and 4 nm for b'–e'.

Wan et al. Nanoscale Res Lett 2011 6:49   doi:10.1007/s11671-010-9793-9