Fig. 1. SEM images of Ag nanostructures deposited on Si substrates for 12 min in an ethanol-based electrolyte containing 0.1 mM AgNO₃, 0.14 M HF, 1 mM PVP and 1 mM L-AA at different current densities: (a) 0 mA cm⁻² (electroless deposition), (b) 1 mA cm⁻², (c) 2 mA cm⁻² and (d) 2.5 mA cm⁻².