1. INM − Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
2. TOFWERK, 3600 Thun, Switzerland
3. AG der Dillinger Hüttenwerke, 66763 Dillingen, Germany
4. Colloid and Interface Chemistry, Saarland University, Campus D2 2, 66123 Saarbrücken, Germany