Cross‐Stacking Aligned Carbon‐Nanotube Films to Tune Microwave Absorption Frequencies and Increase Absorption Intensities

作者：Hao Sun, Renchao Che, Xiao You, Yishu Jiang, Zhibin Yang, Jue Deng, Longbin Qiu, Huisheng Peng · 发表于：Advanced Materials · 年份：2014 · DOI：10.1002/adma.201403735 · 被引用次数：1136 · 研究领域：Electromagnetic wave absorption materials、Advanced Antenna and Metasurface Technologies、Metamaterials and Metasurfaces Applications

Aligned carbon-nanotube (CNT) sheets are used as building blocks to prepare light-weight, frequency-tunable and high-performance microwave absorbers, and the absorption frequency can be accurately controlled by stacking them with different intersectional angles. A remarkable reflection loss of -47.66 dB is achieved by stacking four aligned CNT sheets with an intersectional angle of 90° between two neighboring ones. The incorporation of a second phase such as a metal and a conducting polymer greatly enhances the microwave-absorption capability.