Surface Nanostructuring via Redox Switching of Doped Polypyrrole KS Teh, A. Hanafi, A. Mookerjee, N. Arora and Y-W Lu* (
[email protected]) San Francisco State Univ, Cornell Univ, *Rochester Institute of Technology
Varying the electric potential of as-deposited doped polypyrrole (PPy), which transforms between being a smooth film ÅÆ a rough film or; a hydrophilic film ÅÆ a hydrophobic film Topology changes of PPy sample due to redox switching (a)
(b)
(c)
(d)
(e)
(a)
(f)
Contact Angle [Degree]
120 110
Hydrophobic (e)
100
(f)
90
@ - 0.6 V
synthesis@ +1.0V
80 70
(d)
(c)
(a)
60
Hydrophilic
(d)
(c)
(b)
50 40 -2
-1.5
-1
-0.5
0
0.5
1
1.5
2
Applied Voltage [V]
@ +1.5 V
@ +2.0 V
