Carbon fiber skeleton/silver nanowires composites with tunable negative permittivity behaviorYan An, Jinyuan Qin, Kai Sun, Jiahong Tian, Zhongyang Wang, Yaman Zhao, Xiaofeng Li and Runhua FanEPJ Appl. Metamat., 8 (2021) 1DOI: https://doi.org/10.1051/epjam/2020019