Synthesis of zinc oxide particles coated multiwalled carbon nanotubes: Dielectric properties, electromagnetic interference shielding and microwave absorption
Synthesis of zinc oxide particles coated multiwalled carbon nanotubes: Dielectric properties, electromagnetic interference shielding and microwave absorption
复制标题
氧化锌颗粒包覆多壁碳纳米管的合成：介电性能、电磁干扰屏蔽和微波吸收
DOI：
10.1016/j.materresbull.2012.03.045
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发表时间：
2012-07-01
影响因子：
5.4
通讯作者：
Yuan, Jie
中科院分区：
文献类型：
--
作者：
Song, Wei-Li;Cao, Mao-Sheng;Yuan, Jie
将氧化锌（ZnO）纳米颗粒涂覆在多壁碳纳米管（MWCNT）的表面上。高分辨率透射电子显微镜图像显示，固定在多壁碳纳米管上的纤锌矿ZnO是单晶，具有优先的[0 0 0 2]生长方向。 ZnO和MWCNTs的界面产生了电容器，电阻-电容器模型可以很好地描述复合材料在2-18 GHz频率范围内的结构与介电性能、电磁干扰屏蔽和微波吸收之间的关系。由 ZnO 固定的多壁碳纳米管构建的网络有助于改善电性能。在微波吸收光谱中观察到与界面形成的电容器相关的谐振峰，这表明反射损耗峰极大地拓宽了吸收带宽。 Crown 版权所有 (C) 2012 由 Elsevier Ltd 出版。保留所有权利。
Zinc oxide (ZnO) nanoparticles were coated on the surfaces of multiwalled carbon nanotubes (MWCNTs). High resolution transmission electron microscopy images show that the wurtzite ZnO immobilized on the MWCNTs is single-crystalline with a preferential [0 0 0 2] growth direction. A capacitor was generated by the interface of ZnO and MWCNTs, and a resistor-capacitor model could well describe the relationships between the structure and the dielectric properties, electromagnetic interference shielding and microwave-absorption of the composites in the frequency range of 2-18 GHz. The network built by ZnO-immobilized MWCNTs could contribute to the improvement of electrical properties. Resonant peaks associated with the capacitor formed by the interface were observed in the microwave absorption spectra, which suggest that reflection-loss peaks greatly broadens the absorption bandwidth. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.