**2.2 Ion beam-induced morphological changes in copper nanowires**

The un-implanted Cu-NWs image is presented in **Figure 2(a)**, shows a longshaped Cu-NWs. The diameters of un-irradiated Cu-NWs ranged from 100 to 150 nm. After 10 MeV Cu ions implantation at the dose of 5 × 1015 ions/cm2 , Cu-NWs diffused at the junction points, as shown in **Figure 2(b)**. At high ion dose of 1 × 1016 ions/cm2 , Cu-NWs start to be sliced, i.e., reduce the diameter and finally NWs are cut, as shown in **Figure 2(c)**.
