聚苯胺插层氧化石墨纳米复合材料的电导率和光学性质。

Electrical conductivity and optical properties of polyaniline intercalated graphite oxide nanocomposites.

作者信息

Dutta Kousik, De S K

机构信息

Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India.

出版信息

J Nanosci Nanotechnol. 2007 Jul;7(7):2459-65. doi: 10.1166/jnn.2007.429.

DOI:10.1166/jnn.2007.429

PMID:17663265

Abstract

Layered graphite oxide is used as host material for the synthesis of conducting polymer intercalated nanocomposites. Powder X-ray diffraction, Fourier transform infrared, and UV-VIS absorption spectra indicate the formation of polyaniline within the interlamellar spaces of graphite oxide. The red shift of UV-VIS absorption associated with graphite oxide is found. The direct current (dc) conductivity increases by about three orders of magnitude compare with pristine graphite oxide. The temperature dependence dc conductivity of the nanocomposite follows Mott's three-dimensional variable range hopping. The alternating current (ac) conductivity suggests correlated barrier hopping of conduction process. The conductivity relaxation time varies in the range of 10(-5)-10(-7) Sec.

摘要

层状氧化石墨被用作合成导电聚合物插层纳米复合材料的主体材料。粉末X射线衍射、傅里叶变换红外光谱和紫外-可见吸收光谱表明在氧化石墨的层间空间内形成了聚苯胺。发现了与氧化石墨相关的紫外-可见吸收的红移。与原始氧化石墨相比，直流（dc）电导率增加了约三个数量级。纳米复合材料的温度依赖性直流电导率遵循莫特的三维可变范围跳跃。交流电导率表明传导过程存在相关势垒跳跃。电导率弛豫时间在10^(-5)-10^(-7)秒范围内变化。