1. Technische Universität Chemnitz
2. Measurement and Sensor Technology
3. 09126 Chemnitz
4. Germany
5. Universidade Federal do Paraná
6. Departamento de Física
7. 81531-990 Curitiba
8. Brazil
9. Solid Surfaces Analysis
10. Semiconductor Physics
11. IFW Dresden
12. 01069 Dresden