Enhanced ferromagnetic properties of N2 plasma-treated carbon nanotubes Fang, Zixuan ; Zhao, Hongyang ; Xiong, Lun ; Zhang, Fang ; Fu, Qiuming ; Ma, Zhibin ; Xu, Chuanbo ; Lin, Zhiyong ; Wang, Huan ; Hu, Zhao ; Yao, Shuhua Abstract Publication: Journal of Materials Science Pub Date: February 2019 DOI: 10.1007/s10853-018-2963-3 Bibcode: 2019JMatS..54.2307F