1. Nanotechnology Research Division, Center for Mechanical Technology and Automation (TEMA), Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal
2. CICECO – Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, 3810-193 Aveiro, Portugal
3. Institute of Physics of Materials of the University of Porto (IFIMUP), 4169-007 Porto, Portugal
4. Industrial Electronics Department, University of Minho, Azurem, 4800-058 Guimaraes, Portugal