Fig. 4. XRD spectra for Ni nanowires in PAAM: (A) – H_PAAM = 70 μm, j = 1.5 mA cm⁻², t = 120 min (sample 1); (B) – H_PAAM = 75 μm, j = 2 mA cm⁻², t = 240 min (sample 2); (C) – H_PAAM = 55 μm, j = 3 mA cm⁻², t = 240 min (sample 3); (D) – H_PAAM = 55 μm, j = 4 mA cm⁻², t = 240 min (sample 4).