1. Particle Science and Technology, Institute of Combustion and Gas Dynamics – (IVG-PST), Carl-Benz-Straße 199, 47057 Duisburg, Germany
2. Clinic of Neuroradiologie, Universitätsklinikum Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
3. Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
4. Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen (UDE), Carl-Benz-Straße 199, 47057 Duisburg, Germany