Low temperature conductivity of carbon nanotube aggregates

被引：14
|
作者：
Salvato, M. [1 ,2 ]
Lucci, M. [1 ,2 ]
Ottaviani, I. [1 ,2 ]
Cirillo, M. [1 ,2 ]
Orlanducci, S. [2 ,3 ]
Tamburri, E. [2 ,3 ]
Guglielmotti, V. [2 ,3 ]
Toschi, F. [2 ,3 ]
Terranova, M. L. [2 ,3 ]
Pasquali, M. [4 ]
机构：
[1] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy
[2] Univ Roma Tor Vergata, MINAS Lab, I-00133 Rome, Italy
[3] Univ Roma Tor Vergata, Dipartimento Sci & Tecnol Chim, I-00133 Rome, Italy
[4] Rice Univ, Chem & Biomol Engn Dept, Houston, TX 77251 USA
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2011年 / 23卷 / 47期
关键词：
PREFERRED ORIENTATION; MAGNETORESISTANCE; TRANSPORT; POLYMERS;
D O I：
10.1088/0953-8984/23/47/475302
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We compare, over wide temperature ranges, the transport properties of single-wall carbon nanotubes arranged in the form of aligned arrays or in the form of fibres. The experimental data show that both the forms of aggregates present a crossover in the transport mechanism from three-dimensional hopping of the electrons between localized states at high temperature to fluctuation-induced tunnelling across potential barriers at low temperature. The role of the junctions formed between the bundles in the array and between the nanotubes inside the fibres is discussed on the basis of the experimental results.
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收藏
页数：7
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