Figure 4.
Three-dimensional surface AFM images of P3HT films deposited with spin-coating rates: (a) 750 rpm from 20 mg/mL solution; (b) 4500 rpm from 20 mg/mL solution; (c) 1250 rpm from 40 mg/mL solution; (d) 7000 rpm from 40 mg/mL solution.
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