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Carbonized polyaniline bridging nanodiamond-graphene hybrids for enhanced microwave absorptions with ultrathin thickness
Nanotechnology ( IF 3.5 ) Pub Date : 2020-07-24 , DOI: 10.1088/1361-6528/ab9ed9
Xiangnan Chen 1 , Hairui Xu , Yan Zhang , Lei Tao , Lufeng Yuan , Fanchen Meng , Ruoxuan Huang , Pei Wang , Zuowan Zhou
Affiliation  

For conventional design of the electromagnetic absorption materials, introduction of magnetic materials into dielectric materials has been found to achieve better impedance matching, but lead to increase in weight and decrease in chemical stability, therefore limiting their practical applications. In this work, metal-free electromagnetic coupling was achieved by the design of nitrogen-doped nanodiamond/graphene hybrids. Polyaniline is used to self-assembled bridge the nanodiamond and graphene, and the carbonization is carried out for construction and regulation of the C•••N polarization and nitrogen doping. The carbonized hybrid exhibits remarkably enhanced broadband electromagnetic absorption with the optimal reflection loss value around -47.7 dB at 13.8 GHz with an ultrathin thickness of 1.8 mm. The enhancement in electromagnetic absorption is confirmed to result from nitrogen doped ND induced magnetic dissipation and the C•••N multi-polarization modes, as well as the multiple interfacial structures. This work opens a new route realizing lightweight electromagnetic absorption through constructing nitrogen doped carbon nanomaterial.

中文翻译:

碳化聚苯胺桥接纳米金刚石-石墨烯杂化物,以增强超薄厚度的微波吸收

对于电磁吸收材料的常规设计,已经发现在介电材料中引入磁性材料可以实现更好的阻抗匹配,但会导致重量增加和化学稳定性降低,从而限制了它们的实际应用。在这项工作中,通过设计掺氮纳米金刚石/石墨烯混合物实现了无金属电磁耦合。聚苯胺用于自组装桥接纳米金刚石和石墨烯,并进行碳化以构建和调节C•••N极化和氮掺杂。碳化混合物表现出显着增强的宽带电磁吸收,在 13.8 GHz 下具有 -47.7 dB 左右的最佳反射损耗值,超薄厚度为 1.8 mm。电磁吸收的增强被证实是由掺杂氮的 ND 诱导的磁耗散和 C•••N 多极化模式以及多界面结构造成的。这项工作开辟了一条通过构建氮掺杂碳纳米材料实现轻量化电磁吸收的新途径。
更新日期:2020-07-24
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