SEM imaging and XPS characterization of doped PVDF fibers Tereza Smejkalová, Ştefan Ţălu, Rashid Dallaev, Klára Částková, Dinara Sobola and Anton Nazarov E3S Web Conf., 270 (2021) 01011 Published online: 09 June 2021 DOI: 10.1051/e3sconf/202127001011