High-pressure optical absorption studies of double-walled carbon nanotubes

被引：1

作者：

Marquina, Jesus ^{[1
]}

Flahaut, Emmanuel ^{[2
]}

Gonzalez, Jesus ^{[3
,4
]}

机构：

[1] Univ Los Andes, Fac Ciencias, CEAO, Merida 5101, Venezuela

[2] Univ Toulouse 3, UMR CNRS 5085, Lab Chim Mat Inorgan CIRIMAT, F-31400 Toulouse, France

[3] Univ Los Andes, Fac Ciencias, CES, Merida 5101, Venezuela

[4] Univ Cantabria, Fac Ciencias, DCITIMAC Malta Consolider Team, Santander 69005, Spain

来源：

PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS | 2012年 / 6卷 / 9-10期

关键词：

double-walled carbon nanotubes; optical absorption; high-pressure effects; Van Hove singularities; HYDROSTATIC-PRESSURE; RAMAN MODES; DEPENDENCE; SPECTROSCOPY;

D O I：

10.1002/pssr.201206280

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this Letter the electronic properties of double-walled carbon nanotubes (DWCNTs) were studied by transmission measurements as a function of hydrostatic pressure up to 10 GPa. The energies of the optical transitions between the Van Hove singularities decrease with increasing pressure, which can be attributed to pressure-induced hybridization and symmetry-breaking effects. We observed a linear behaviour in the pressure-induced shift of the optical transitions. This is in good agreement with previous studies on single-walled carbon nanotubes (SWCNTs). High-resolution TEM image of a bundle of DWCNTs (A), histogram of the number of walls (B), and diameter distribution for CNT samples plotted from 100 HRTEM images (C). ((c) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

引用

页码：382 / 384

页数：3

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