Synthesis and characterization of single-walled nanotubes produced with Ce/Ni as catalysts

被引：42

作者：

Liu, BB ^{[1
]}

Wågberg, T

Olsson, E

Yang, RS

Li, HD

Zhang, SL

Yang, HB

Zou, GT

Sundqvist, B

机构：

[1] Umea Univ, Dept Expt Phys, S-90187 Umea, Sweden

[2] Jilin Univ, Natl Lab Superhard Mat, Changchun 130023, Peoples R China

[3] Uppsala Univ, Angstrom Lab, S-75121 Uppsala, Sweden

[4] Beijing Univ, Dept Phys, Beijing 100871, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2000年 / 320卷 / 3-4期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/S0009-2614(00)00235-9

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：

SWNTs were synthesized in high yield in the presence of Ce/Ni as catalyst. Raman and SEM results show that a fraction of the tubes are chiral and have small diameters (the snallest one is 0.79 nm), indicating that Ce plays an important role in the formation. Acid treatment is effective in eliminating impurities but changes the morphology and the electric resistance of mats with increasing treatment time. The resistance of as-grown and shea time acid-treated mats follow a 2D VRH behaviour while mats treated for a long time follow a 3D model. The results indicate that hopping conduction occurs on bundles or on tubes and that there are intrinsic links between tubes in as-grown mats. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：365 / 372

页数：8

共 28 条

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