Electromagnetic wave absorbing properties of amorphous carbon nanotubes

Tingkai Zhao*, Cuilin Hou, Hongyan Zhang, Ruoxing Zhu, Shengfei She, Jungao Wang, Tiehu Li, Zhifu Liu, Bingqing Wei

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

143 Scopus citations

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 6wt% lanthanum nitrate. The reflection loss (R) value of a lanthanum nitrate doped ACNT/PVC composite was-25.02dB at 14.44 GHz, and the frequency bandwidth corresponding to the reflector loss at-10 dB was up to 5.8GHz within the frequency range of 2-18 GHz.

Original languageEnglish (US)
Article number5619
JournalScientific reports
Volume4
DOIs
StatePublished - Jul 10 2014

ASJC Scopus subject areas

  • General

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