1. School of
Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
2. Facility for Analysis, Characterization,
Testing and Simulation, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
3. Energy Research Institute @ NTU, Nanyang Technological University, 50 Nanyang Drive, 637553,
Singapore
4. Ernst Ruska-Centrum und Peter Grünberg Institut, Forschungszentrum Jülich, D-52425 Jülich, Germany
5. Institute of Materials for Electronic Engineering II, RWTH-Aachen, Sommerfeldstr.
24, D-52074 Aachen, Germany