The potential of Rutherford Backscattering Spectrometry for composition analysis of colloidal nanocrystals

摘要

We investigate the potential of elastic scattering of energetic ions forcompositional analysis of magnetic colloidal nanocrystals. Thin layers ofnanocrystals deposited by spin coating on Si-wafers are investigated by twodifferent set-ups for Rutherford Backscattering Spectrometry (RBS), employingdifferent projectile ions (4He, 12C) and primary energies (600 keV - 8 MeV).The advantages and disadvantages of the different approaches are discussed interms of obtainable mass resolution, necessary primary particle fluence anddeposited energy. It is shown that different isotopes of transition metals canbe resolved by employing 8 MeV 12C3+ primary ions.