Preparation of electrospun polyacrylonitrile fibers containing only the polarization chargesQin Zhong, Yongyi Yao, Xiaoming Guo, Tao Zhou and Ruili XiangEur. Phys. J. Appl. Phys., 78 2 (2017) 20402DOI: https://doi.org/10.1051/epjap/2017160320