Figure 4.

SEM images of the used nanodot arrays. Nanodot arrays of 100-nm and 200-nm were cleaned and washed thoroughly after culturing cells. SEM images were taken on the cleaned nanodot arrays of (a,b) 100-nm and (c,d) 200-nm

Pan et al. Nanoscale Research Letters 2009 4:903-912   doi:10.1007/s11671-009-9333-7