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Terahertz time domain spectroscopy of graphene andMXenepolymer composites

机译:石墨烯和Mxen聚合物复合材料的太赫兹时域光谱

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摘要

The rising demand for faster and more efficient electronic devices forces electronics industry to shift toward terahertz frequencies. Therefore there is a growing need for efficient, lightweight, and easy to produce absorbing materials in the terahertz range for electromagnetic interference (EMI) shielding and related applications. This study presents a study on basic optical properties of two types polymer-based composites loaded with two-dimensional structures-graphene and MXene phases (Ti2C). In said range, total EMI shielding efficiency (SE) and its components, the absorption coefficient (alpha), refractive index, and complex dielectric function are investigated. The ratio of SE absorption component to reflection component (SEABS:SER) of fabricated composites is equal or higher than 30:1 in over 80% of studied range. The fabricated composites exhibit low (<0.1) loss tangent in studied range. The addition of 1 wt% of graphene increases the composite alpha over 10-fold in respect to pure polymer-up to60 cm(-1)for frequency higher than 2 THz.
机译:对更快、更高效的电子设备的需求不断增长,迫使电子行业转向太赫兹频率。因此,人们越来越需要高效、轻质、易于生产的太赫兹吸收材料,用于电磁干扰(EMI)屏蔽和相关应用。本文研究了两种高分子基复合材料的基本光学性质,它们分别具有二维结构石墨烯和MXene相(Ti2C)。在该范围内,研究了总EMI屏蔽效率(SE)及其分量、吸收系数(α)、折射率和复介电函数。在80%以上的研究范围内,所制备复合材料的硒吸收成分与反射成分(SEABS:SER)之比等于或大于30:1。在研究范围内,所制备的复合材料表现出较低的(<0.1)损耗角正切。当频率高于2太赫兹时,加入1 wt%的石墨烯可使复合材料的α比纯聚合物增加10倍,最高可达60厘米(-1)。

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