Dielectrophoretic classification of fibres: principles and application to glass fibres suspended in air Frantisek Lizal, Milan Maly, Jakub Elcner, Arpad Farkas, Ondrej Pech, Ondrej Misik, Jan Jedelsky and Miroslav Jicha EPJ Web Conf., 213 (2019) 02053 Published online: 28 June 2019 DOI: 10.1051/epjconf/201921302053