Preparation and characterization of multiwall carbon nanotube/polypyrrole coaxial fibrils

被引：12
|
作者：
Bhatia, Ravi [1 ]
Sangeeth, C. S. Suchand [1 ]
Prasad, V. [1 ]
Menon, Reghu [1 ]
机构：
[1] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India
来源：
PHYSICA B-CONDENSED MATTER | 2011年 / 406卷 / 09期
关键词：
Multiwall carbon nanotubes; Composites; Electron microscopy; Electrical characterizations; CURRENT-VOLTAGE CHARACTERISTICS; ELECTROCHEMICAL CAPACITANCE; PHOTOVOLTAIC DEVICES; FIELD-EMISSION; NANOTUBE; POLYPYRROLE; COMPOSITE; POLYANILINE; ARRAYS; FILMS;
D O I：
10.1016/j.physb.2011.02.016
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Multiwall carbon nanotube (MWNT)/polypyrrole (PPy) fibrils were fabricated by template-free in situ electrochemical deposition of PPy over MWNTs, and characterized by electron microscopy and electrical measurements. Scanning and transmission electron microscopy studies reveal that PPy coating on the surface of nanotube is quite uniform throughout the length, with the possibility of forming unique Y-junctions. Current (I)-voltage (V) characteristics at various temperatures show nonlinearity due to tunneling and hopping contributions to transport across the barriers. AC conductivity measurements (300-4.2 K) show that the onset frequency scales with temperature, and the nanoscale connectivity in MWNT/PPy fibrils decreases with the lowering of temperature. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：1727 / 1732
页数：6
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