[1] Univ Texas Pan Amer, Phys & Geol Dept, Edinburg, TX 78541 USA
[2] Univ Groningen, Dept Appl Phys, NL-9747 AG Groningen, Netherlands
[3] Natl Res Council Italy, Rome, Italy
[4] Univ Basque Country, Dept Mat Phys, San Sebastian, Spain
[5] Univ Miskolc, Miskolc, Hungary
[6] BAY NANO Res Inst, Miskolc, Hungary
[7] CNC Coatings Co, Rochdale, England
[8] UCL, Ctr Nanotechnol & Regenerat Med, London, England