[1] Ludwig Maximilians Univ Munchen LMU, Dept Chem, Butenandtstr 5-13 E, D-81377 Munich, Germany
[2] Ludwig Maximilians Univ Munchen LMU, Ctr NanoSci CeNS, Butenandtstr 5-13 E, D-81377 Munich, Germany
[3] Forschungszentrum Julich, Inst Energy & Climate Res IEK 1, Mat Synth & Proc, Wilhelm Johnen Str, D-52425 Julich, Germany
[4] Univ Duisburg Essen, Fac Engn, Lotharstr 1, D-47057 Duisburg, Germany
[5] Univ Duisburg Essen, Ctr Nanointegrat Duisburg Essen CENIDE, Lotharstr 1, D-47057 Duisburg, Germany
[6] Muller BBM GmbH, Robert Koch Str 11, D-82152 Planegg, Germany