Wheat-like Ni-coated core-shell silver nanowires for effective electromagnetic wave absorption

Tianyi Hang; Jiajia Zheng; Yifan Zheng; Shaohua Jiang; Lijie Zhou; Zhaoxun Sun; Xiping Li; Guoxiu Tong; Yiming Chen

doi:10.1016/j.jcis.2023.06.087

Wheat-like Ni-coated core-shell silver nanowires for effective electromagnetic wave absorption

J Colloid Interface Sci. 2023 Nov:649:394-402. doi: 10.1016/j.jcis.2023.06.087. Epub 2023 Jun 17.

Authors

Tianyi Hang¹, Jiajia Zheng¹, Yifan Zheng¹, Shaohua Jiang², Lijie Zhou³, Zhaoxun Sun¹, Xiping Li¹, Guoxiu Tong⁴, Yiming Chen⁵

Affiliations

¹ Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology & Equipment of Zhejiang Province, College of Engineering, Zhejiang Normal University, Jinhua 321004, China.
² Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
³ Zhejiang Normal University, Jinhua 321004, China.
⁴ Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China.
⁵ Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology & Equipment of Zhejiang Province, College of Engineering, Zhejiang Normal University, Jinhua 321004, China. Electronic address: yiming.chen@zjnu.edu.cn.

PMID: 37354796
DOI: 10.1016/j.jcis.2023.06.087

Abstract

Nowadays, developing high-performance electromagnetic functional materials to eliminate the ever-increasing electromagnetic pollution problem is necessary for the complex electromagnetic environment. However, the materials with high electrical conductivity are prone to secondary electromagnetic pollution due to interface impedance mismatching. Herein, the wheat-like electrically conductive and magnetic silver nanowire@nickle (AgNW@Ni) composites were fabricated via a one-pot in-situ growth method. The electromagnetic properties of the composites could be regulated by adjusting different ratios of precursors, resulting in various morphological features of the nanowire as the core with different Ni shell thicknesses. When the Ag and Ni molar ratio was 1:1.1, the AgNW@Ni composite exhibited the optimal minimum reflection loss (RL_min) of -61.1 dB with an adequate effective absorption bandwidth (EAB) of 4.06 GHz owing to good impedance matching, abundant heterostructures, and synergistic electrical and magnetic losses. Even after three months, it still maintained an acceptable RL_min value of -39.7 dB and similar EAB, demonstrating its long-term operational stability. This unique composite is expected to be applied in more actual electromagnetic protection occasions.

Keywords: Absorption mechanism; Electromagnetic wave absorption; Ni-coated core–shell silver nanowire; Wheat-like structure.