Construction of a Cu-Sn Heterojunction Interface Derived from a Schottky Junction in Cu@Sn/rGO Composites as a Highly Efficient Dielectric Microwave Absorber
| Autor: | Xiaoxiao Huang, Xinyu Wang, Guangwu Wen, Tiantian Li, Hua Yang, Chunlin Qin, Long Xia, Tao Zhang, Li Xiong |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Graphene Schottky barrier Reflection loss chemistry.chemical_element Heterojunction 02 engineering and technology Dielectric 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention chemistry law General Materials Science Composite material 0210 nano-technology Absorption (electromagnetic radiation) Tin Microwave |
| Zdroj: | ACS applied materialsinterfaces. 13(10) |
| ISSN: | 1944-8252 |
| Popis: | Developing high-performance dielectric absorbers, low filler loading, and a broad absorption band remains a great challenge for wireless data communication systems, household appliances, local area network, and so on. Herein, we report a facile green method to design and fabricate a copper-coated tin/reduced graphene oxide (Cu@Sn/rGO) composites with a heterojunction obtained by modifying a Schottky junction. The unique heterojunction can enable an appropriate balance between impedance and strong loss capacity. Meanwhile, it can not only promote the carrier migration but also obtain the rich interfaces. Consequently, a Cu@Sn/rGO composite with a heterojunction exhibits superior absorption intensity, far surpassing that of other absorbing materials reported. With a weight content of only 5 wt %, the maximum absorptivity reaches -49.19 dB at 6.08 GHz, and an effective absorption bandwidth (RL < -10 dB) of 13.94 GHz is achieved when the absorber's thickness ranges from 1.7 to 5.5 mm. This study provides new insights into the design and synthesis of a novel microwave absorption material with lightweight, smaller filler loading, and strong reflection loss. |
| Databáze: | OpenAIRE |
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