Evidence of potential sputtering of ultra-thin Pt films due to impact of   multi-charged Ar ions
  The phenomenon of potential sputtering of ultra-thin Pt films due to impact of 20 keV highly charged $Ar^{q+}$ (q = 3 - 8) ions has been investigated. The results show enhanced erosion of the Pt film with the increase of potential energy of the Ar projectile. 
D.Ghose and P.Karmakar