1. Laboratory for Energy and NanoScience (LENS), Khalifa University of Science and Technology, Masdar Campus, Abu Dhabi 54224, United Arab Emirates
2. Depatment of Mechanical and Materials Engineering, Khalifa University of Science and Technology, Masdar Campus, Abu Dhabi 54224, United Arab Emirates
3. Department of Physics and Technology, UiT The Arctic University of Norway, 9010 Tromsø, Norway