1. IPN–Leibniz Institute for Science and Mathematics Education, 24118 Kiel, Germany; Institute of Physics Education, University of Münster, 48149 Münster, Germany; and 6 Institute of Physics, University of Münster, 48149 Münster, Germany
2. Institute of Materials Science, Faculty of Engineering, University of Kiel, 24143 Kiel, Germany
3. IPN–Leibniz Institute for Science and Mathematics Education, 24118 Kiel, Germany