SIMS. Strengths, Limitations

Strengths

  • High sensitivities
  • Very low detection limits (ppm and below)
  • Depth profiles with high depth resolution (1 nm) at low detection limits
  • Detection of any element in the mass range from 1H to 238U
  • High lateral resolution (1 ┬Ám)
  • High dynamic range (6 orders of magnitude)

Limitations

  • Destruction of the sample surface
  • Mixing and recoil processes
  • Topographical effects, surface roughness
  • High variation of ionisation cross sections
  • Matrix dependence of detection sensitivities
  • No information about chemical bonds
  • Solid and vacuum resistant samples are required
RTG Mikroanalyse GmbH Berlin