1. Institute for Materials Research (IMO); Material Physics, Hasselt University; Wetenschapspark 1 3590 Diepenbeek Belgium
2. IMEC vzw; Division IMOMEC; Wetenschapspark 1 3590 Diepenbeek Belgium
3. Institute for Materials Research (IMO); Inorganic and Physical Chemistry; Agoralaan, Building D 3590 Diepenbeek Belgium