The PPNWs were fabricated according to previous work [26].
They were electrochemically deposited by repeatedly cycling the
potential from 0.0 to 0.80 V in 0.1 M PBS (pH 7.4) solution containing
0.1 M LiClO4 and 0.015 M pyrrole at a sweep rate of 50 mV/s
for 20 cycles. The GNPs were electrochemically deposited on the
prepared electrode by CV scanning from 0.2 V to
−1.0 V in 0.1 MKCl solution containing 0.5 mM HAuCl4 at a sweep rate of 50 mV/s
for 20 cycles. The modified electrode was obtained and denoted as
Au/MWNT/PPNWs/GNPs.