AFM images of pristine Si and gold-coated Si. AFM images of pristine Si (Si) and Si sputtered with gold for 30 s (Si/Au 30) and for 150 s (Si/Au 150). Ra represents the average surface roughness in nanometers; AFM images in both 2D and 3D views are shown.
Malinský et al. Nanoscale Research Letters 2012 7:241 doi:10.1186/1556-276X-7-241