Intermediate frequency modes in Raman spectra of Ar+-irradiated single-wall carbon nanotubes

被引：31
作者：
Skakalova, Viera
Maultzsch, Janina
Osvath, Zoltan
Biro, Laszlo P.
Roth, Siegmar
机构：
[1] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany
[2] Tech Univ Berlin, Inst Festkorperphys, D-10623 Berlin, Germany
[3] Hungarian Acad Sci, Res Inst Tech Phys & Mat Sci, H-1525 Budapest, Hungary
来源：
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS | 2007年 / 1卷 / 04期
关键词：
D O I：
10.1002/pssr.200701069
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the effect of Ar+ irradiation on the intermediate frequency modes (IFM) in Raman spectra of single-wall carbon nanotubes. We observe new features in the intermediate frequency region from 386 to 635 cm(-1) as the defect concentration increases, whereas at the same time there is a decrease of other IFM modes. After annealing in vacuum, the IFM modes recover and become similar to those of the nanotubes before irradiation. We interpret the new features in the Raman spectra as originating from the phonon density of states that becomes visible in the Raman process due to the presence of defects.
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页码：138 / 140
页数：3
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