1. Institute
of Materials Chemistry, Vienna University of Technology, Getreidemarkt
9/BC/02, 1060 Vienna, Austria
2. Institute
for Solid State Electronics, Vienna University of Technology, Floragasse
7, 1040 Vienna, Austria
3. University
Servicecenter for TEM (USTEM), Vienna University of Technology, Wiedner
Hauptstrasse 8-10, 1040 Vienna, Austria