J. Mater. Sci. Technol. ›› 2026, Vol. 244: 149-155.DOI: 10.1016/j.jmst.2025.03.102

• Research Article • Previous Articles     Next Articles

Surface-state-constrained topological insulator Bi2Te3 nanorods for electromagnetic wave trapping and conversion into electricity

Xue-Hao Liua,b, Jia-Ning Caia, Jun-Ying Zhanga,*, Pei-Yan Zhaoc, Guang-Sheng Wangc, Song Bid, Zhi-Ling Houa,*   

  1. aSchool of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing 100124, China;
    bCollege of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, China;
    cState Key Laboratory of Bioinspired Interfacial Materials Science, Bioinspired Science Innovation Center, Hangzhou International Innovation Institute, Beihang University, Hangzhou 311115, China;
    d501 Department, Xi’an Research Institute of High-Tech, Xi’an 710025, China
  • Received:2025-03-01 Revised:2025-03-26 Accepted:2025-03-26 Published:2026-02-10 Online:2025-05-28
  • Contact: *E-mail addresses: zhangjy@bjut.edu.cn (J.-Y. Zhang), houzl@bjut.edu.cn (Z.-L. Hou)

Abstract: Electromagnetic waves have potential application prospects in wireless power transmission. However, the performance of existing electromagnetic wave converting materials is constrained by inherent limitations, which renders them insufficient to meet the demand of wireless energy transmission. Herein, we report topological insulator Bi2Te3 nanorods for converting electromagnetic waves into electricity, taking advantage of surface-state-constrained electrical transport characteristics and thermoelectric conversion capacity. Surface-state-constrained electrical transport characteristics endow the metastructure composed of Bi2Te3 nanorods with excellent microwave absorption performance, with an effective absorbing bandwidth of 13.3 GHz and a minimum reflection loss of -57 dB at a thickness of 5.3 mm thickness. Depending on the favorable conductivity, quantum confinement effect and phonon scattering of the nanorod structure, Bi2Te3 nanorods exhibit outstanding thermoelectric conversion performance at 573 K (ZT = 1.12), suggesting the feasibility for compatible excellent microwave absorbing and thermoelectric properties with a single material. This work provides a promising solution to the application of electromagnetic waves in wireless power supply.

Key words: Bi2Te3 nanorods, Topological insulators, Microwave absorption, Electromagnetic wave trapping