Visiting period: 18.09.2019 – 13.12.2019 Visiting institution: Beijing Institute of Nanoenergy and Nanosystems (BINN), Chinese Academy of Science (CAS), Beijing, China Xidian University – School of Advanced Materials and Nanotechnology, Xi’an, China Visiting scientists: Prof. Ya Yang (BINN, CAS) and Prof. Rusen Yang (Xidian University) My research stay in China was split into work at two different institutes. For six…