The samples were stacked in a stainless-steel sample holder placed into a Pelletron implantation system type 3 SDH-2 NEC. 107 Ag ions were implanted into both polished sides, flipping over after implantation of one side, with an energy of 1.930 MeV, a peak concentration of 1´10 14 107 Ag ions cm -2 (1´10 18 107 Ag ions cm -3 ) and a current density of 85 nA cm -². The implanted samples were then put in 0.1M HCl for around 20s followed by a rinse with Isopropanol and transferred to an Ar filled glovebox (O2 and H2O < 0.1 ppm) for storage and further experiments.