Key Laboratory of Multifunctional Nanomaterials and Smart Systems Materials Division Institute of Nano-Tech and Nano-Bionics Academy of Sciences 215123’s Republic of China;
School of Science Institute of Technology 330099’s Republic of China;
Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials Institute of Nanotechnology 330200’s Republic of China;
School of Nano-Tech and Nano-Bionics of Science and Technology of China 230026’s Republic of China;
School of Materials Science and Engineering Technological University Nanyang Avenue 639798;
Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application of Physical Science and Technology University of Science and Technology 215009’s Republic of China;
School of Mechanical and Power Engineering Tech University 211800’s Republic of China;
Henan Key Laboratory of Materials On Deep-Earth Engineering of Materials Science and Engineering Polytechnic University 454003’s Republic of China;
College of Safety Science and Engineering’an University of Science and Technology’an 710054’s Republic of China;
Gradient structures; Carbon nanospheres; Electromagnetic wave absorption; Impedance matching;