1. Department of Micro- and Nanoelectronic Systems, Technische Universität Ilmenau, Gustav-Kirchhoff-Straße 1, 98693 Ilmenau, Germany
2. nano analytik GmbH, Ehrenbergstr. 1, 98693 Ilmenau, Germany
3. Center for High Technology Materials, University of New Mexico, Albuquerque, New Mexico 87106