Directed Growth and Microwave Absorption Property of Crossed ZnO Netlike Micro-/Nanostructures

被引：154

作者：

Li, Huifeng ^{[1
]}

Huang, Yunhua ^{[2
]}

Sun, Genban ^{[2
]}

Yan, Xiaoqin ^{[2
]}

Yang, Ya ^{[2
]}

Wang, Jian ^{[1
]}

Zhang, Yue ^{[1
,2
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Dept Mat Phys & Chem, Beijing 100083, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 22期

关键词：

ZINC-OXIDE; NANOWIRE; NANOSTRUCTURES; NANOBELTS; NETWORKS; SPHERES; ARRAYS;

D O I：

10.1021/jp100341h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Three-dimensional ZnO micro/nanorod networks were synthesized through the direct evaporation of metal zinc and graphite powders in Ar and O-2 at 910 degrees C without any catalyst. The micro/nanorod networks of as-synthesized ZnO were characterized by using scanning electron microscopy, high-resolution transmission electron microscopy, and X-ray diffraction. The branches within one network show very regular cross orientation. The nanorods follow a growth direction [0001]. Mircrowave absorption properties of the ZnO netlike structures have been investigated in detail. The reflection loss (RL) of the netlike structures and nanotetrapod-shaped ZnO were calculated by using the relative complex permeability and permittivity. And the value of minimum RL for the composite with 50 vol % ZnO netlike structures is -37 dB at 6.2 GHz with a thickness of 4.0 mm. These results provide a wide insight for the netlike structure ZnO as desirable materials for the fabrication of micro/nanoscale functional electromagnetic shield devices.

引用

页码：10088 / 10091

页数：4

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