期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 13, 页码 12752-12760出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b21516
关键词
gadolinium hydroxide; rare-earth nanocomposites; electromagnetic wave absorber; light weight; impedance matching
资金
- National Natural Science Foundation of China [51590882, 51631001]
- Fundamental Research Funds for the Central Universities [FRF-TP-15-007A3, FRF-GF-17-B16]
- State key Project of Research and Development of China [2017YFA0206301]
Light-weight and highly efficient nanocomposite absorbing materials are gaining tremendous interest in recent years. Because of the unique electronic structure characteristics, nanoscale rare-earth materials are of great significance in the development of advanced functional materials. Herein, gadolinium hydroxide/polypyrrole (Gd(OH)3@PPy) nanocomposites were synthesized by a facial chemical solution route. The composites could achieve an absorbing performance of 51.4 dB at 16.2 GHz with a bandwidth of 4.8 GHz, covering the entire Ku band at a thickness of only 2.2 mm. Furthermore, the absorption intensity and bandwidth can be effectively tuned by adjusting the concentration of Gd(OH)3 in the composite. Because of the improvement of impedance matching, dual-loss mechanism, and the synergistic effect of rare-earth hydroxides and conductive polymers, light-weight gadolinium hydroxideppolypyrrole composites are considered as promising candidates for strong and broadband electromagnetic wave absorption.
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