Characterization of functional nanoparticles applied in face masks by STEM-EDX Charlotte Wouters, Marina Ledecq, Denrich Morales, Khariklia Tsilikas, François-Xavier Ouf, Eveline Verleysen and Jan Mast BIO Web Conf., 129 (2024) 26002 Published online: 17 October 2024 DOI: 10.1051/bioconf/202412926002