Fig. 3. SEM images of AgNF arrays electrodeposited onto Si substrates at a current density of 2 mA cm⁻² in an ethanol-based electrolyte containing 0.1 mM AgNO₃, 0.14 M HF, 0.1 mM PVP and 0.1 mM L-AA for different deposition times: (a) 5 min, (b) 12 min and (c) 15 min.