Graphene‐Based Composites Combining Both Excellent Terahertz Shielding and Stealth Performance,Advanced Optical Materials

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Graphene‐Based Composites Combining Both Excellent Terahertz Shielding and Stealth Performance
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-10-21 , DOI: 10.1002/adom.201801165
Zhiyu Huang ₁ , Honghui Chen ₁ , Shitong Xu ₂ , Lucy Yimeng Chen ₃ , Yi Huang ₁ , Zhen Ge ₁ , Wenle Ma ₁ , Jiajie Liang ₁ , Fei Fan ₂ , Shengjiang Chang ₂ , Yongsheng Chen _{1,

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Affiliation

Strong terahertz‐response material which exhibits both excellent terahertz shielding and stealth performance is promising in practical applications of terahertz technology. Here, ultralight graphene foam (GF) and multiwalled carbon nanotubes/multiwalled graphene foam (MGF) have been first demonstrated to achieve both superior terahertz shielding and stealth performance due to the dominant absorption loss with negligible reflection. The terahertz shielding effectiveness values of GF and MGF, both 3 mm thick, reach up to 74 and 61 dB. Meanwhile, their average terahertz reflection loss values are achieved up to 23 and 30 dB, respectively, which are the best results in existing broadband terahertz shielding/stealth materials. Importantly, their qualified absorption bandwidths (reflection loss value larger than 10 dB) cover the entire measured frequency band of 0.1–1.6 THz. Furthermore, the quantitative relationships between the terahertz shielding effectiveness, reflection loss, and material parameters are accurately established, which should facilitate the material design for terahertz shielding and stealth. Comprehensively considering the important indicators of density, bandwidth, and intensity, the specific average terahertz shielding coefficient and the specific average terahertz absorption performance are achieved up to 1.1 × 10⁵ and 3.6 × 10⁴ dB cm³ g⁻¹, respectively, which is over thousands of times larger than other kinds of materials reported previously.

中文翻译：

兼具出色的太赫兹屏蔽和隐身性能的石墨烯基复合材料

具有出色的太赫兹屏蔽性能和隐身性能的强太赫兹响应材料在太赫兹技术的实际应用中很有希望。在这里，超轻石墨烯泡沫（GF）和多壁碳纳米管/多壁石墨烯泡沫（MGF）由于具有显着的吸收损耗且反射率可忽略不计，因此首次获得了出色的太赫兹屏蔽性能和隐身性能。GF和MGF的太赫兹屏蔽效果值均为3 mm厚，分别达到74和61 dB。同时，它们的平均太赫兹反射损耗值分别达到23 dB和30 dB，这是现有宽带太赫兹屏蔽/隐身材料的最佳结果。重要的，它们的合格吸收带宽（反射损耗值大于10 dB）覆盖了整个测得的0.1–1.6 THz频带。此外，精确建立了太赫兹屏蔽效果，反射损耗和材料参数之间的定量关系，这将有助于太赫兹屏蔽和隐身性的材料设计。综合考虑密度，带宽和强度的重要指标，比平均太赫兹屏蔽系数和比平均太赫兹吸收性能达到1.1×10 这应该有助于太赫兹屏蔽和隐身的材料设计。综合考虑密度，带宽和强度的重要指标，比平均太赫兹屏蔽系数和比平均太赫兹吸收性能达到1.1×10 这应该有助于太赫兹屏蔽和隐身的材料设计。综合考虑密度，带宽和强度的重要指标，比平均太赫兹屏蔽系数和比平均太赫兹吸收性能达到1.1×10^分别为5和3.6×10 ⁴ dB cm ³ g ^-1，比以前报道的其他种类的材料大数千倍。

更新日期：2018-10-21

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