title: Electromagnetic wave absorbing properties of amorphous carbon nanotubes.
abstract: Amorphous carbon nanotubes (ACNTs) with diameters in the range of 7-50 nm were used as absorber materials for electromagnetic waves. The electromagnetic wave absorbing composite films were prepared by a dip-coating method using a uniform mixture of rare earth lanthanum nitrate doped ACNTs and polyvinyl chloride (PVC). The microstructures of ACNTs and ACNT/PVC composites were characterized using transmission electron microscope and X-ray diffraction, and their electromagnetic wave absorbing properties were measured using a vector-network analyzer. The experimental results indicated that the electromagnetic wave absorbing properties of ACNTs are superior to multi-walled CNTs, and greatly improved by doping 6 wt% lanthanum nitrate. The reflection loss (R) value of a lanthanum nitrate doped ACNT/PVC composite was -25.02 dB at 14.44 GHz, and the frequency bandwidth corresponding to the reflector loss at -10 dB was up to 5.8 GHz within the frequency range of 2-18 GHz.
authors.affiliation: School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, P. R. China.
authors.forename: Tingkai
authors.initials: T
authors.lastname: Zhao
authors.affiliation: School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, P. R. China.
authors.forename: Cuilin
authors.initials: C
authors.lastname: Hou
authors.affiliation: School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, P. R. China.
authors.forename: Hongyan
authors.initials: H
authors.lastname: Zhang
authors.affiliation: School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, P. R. China.
authors.forename: Ruoxing
authors.initials: R
authors.lastname: Zhu
authors.affiliation: School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, P. R. China.
authors.forename: Shengfei
authors.initials: S
authors.lastname: She
authors.affiliation: School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, P. R. China.
authors.forename: Jungao
authors.initials: J
authors.lastname: Wang
authors.affiliation: School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, P. R. China.
authors.forename: Tiehu
authors.initials: T
authors.lastname: Li
authors.affiliation: Department of Materials Science and Engineering, Northwestern University, Evanston IL 60208, USA.
authors.forename: Zhifu
authors.initials: Z
authors.lastname: Liu
authors.affiliation: 1] School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, P. R. China [2] Department of Mechanical Engineering, University of Delaware, Newark DE 19716, USA.
authors.forename: Bingqing
authors.initials: B
authors.lastname: Wei