Figure 4.

AFM images of pristine (PTFE) and Au-coated (PTFE/Au) samples (thickness of 20 nm). Before (RT) and after annealing at 300°C. Numbers in frames are measured surface roughnesses Ra in nanometers.

Siegel et al. Nanoscale Research Letters 2011 6:588   doi:10.1186/1556-276X-6-588
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