Anisotropic electrical properties of semiconductive Bi2S3 nanorod filled ferroelectric polyvinylidene fluoride

被引：26
作者：
Shen, Y [1 ]
Nan, CW [1 ]
Li, M [1 ]
机构：
[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
来源：
CHEMICAL PHYSICS LETTERS | 2004年 / 396卷 / 4-6期
关键词：
D O I：
10.1016/j.cplett.2004.08.088
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：
A novel ferroelectric polymer composite with semiconductive Bi2S3 nanorods loaded in ferroelectric polyvinylidene fluoride (PVDF) is prepared via a simple solution-cast method. A high dielectric constant of over 100, which is over 10 times larger than that of the polymer matrix, is obtained in the percolative composite with a low loading concentration of 0.5 vol% Bi2S3 nanorods. The preferential orientations of Bi2S3 nanorods in the polymer PVDF lead to anisotropy of electrical properties of the composite along the directions parallel (in-plane) and perpendicular (out-of-plane) to the sample surface. The in-plane dielectric constant of the percolative composite sharply decreases at low frequency, and this anisotropy becomes small at high frequency. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：420 / 423
页数：4
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