A temperature-activated nanocomposite metamaterial absorber with a wide tunability  

作　　者：Weiwei Li Lingyu Zhao Zhaohe Dai Hao Jin Feng Duan Junchao Liu Zhihui Zeng Jun Zhao Zhong Zhang 

机构地区：[1]CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China [2]University of Chinese Academy of Sciences, Beijing 100149, China

出　　处：《Nano Research》2018年第7期3931-3942,共12页纳米研究（英文版）

基　　金：This project was jointly supported by the National Basic Research Program of China （No. 2013CB934203）, the ＂Strategic Priority Research Program＂ of the Chinese Academy of Sciences （No. XDA09030200）, and the National Natural Science Foundation of China （No. 11225210）.

摘　　要：Novel thin and flexible broadband electromagnetic microwave absorbers are realized with nanocomposites and achieve a wide frequency tunability （from 10 to 17.2 GHz） by actively adjusting the resistance. The proposed absorbers are fabricated by scalable screen printing of optimized nanoparticle ink onto the flexible dielectric composite substrates. Based on the shape memory effects of the substrate and piezoresistive effect of the nanocomposite frequency selective surface, a controllable sheet resistance, and thereby tunable wave absorption performance, can be realized in a temperature-activated and dynamically stable manner. The results provide new dimensions for the design of active electromagnetic devices by utilizing previously underestimated intrinsic properties of the artificial materials and the smart behavior of polymer-based nanocomposites.Novel thin and flexible broadband electromagnetic microwave absorbers are realized with nanocomposites and achieve a wide frequency tunability （from 10 to 17.2 GHz） by actively adjusting the resistance. The proposed absorbers are fabricated by scalable screen printing of optimized nanoparticle ink onto the flexible dielectric composite substrates. Based on the shape memory effects of the substrate and piezoresistive effect of the nanocomposite frequency selective surface, a controllable sheet resistance, and thereby tunable wave absorption performance, can be realized in a temperature-activated and dynamically stable manner. The results provide new dimensions for the design of active electromagnetic devices by utilizing previously underestimated intrinsic properties of the artificial materials and the smart behavior of polymer-based nanocomposites.

关 键 词：composite materials flexible electronics METAMATERIALS polymeric materials shape memory polymers 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论] TN107[自动化与计算机技术—计算机科学与技术]