1. Institute for Integrative Nanosciences, IFW Dresden, 01069 Dresden, Germany
2. Material Systems for Nanoelectronics, Technische Universität Chemnitz, 09107 Chemnitz, Germany
3. Research Center for Materials, Architectures and Integration of Nanomembranes (MAIN), Technische Universität Chemnitz, Rosenbergstrasse 6, 09126 Chemnitz, Germany
4. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China