An observation of the radial breathing mode in the Raman spectra of CVD-grown multi-wall carbon nanotubes
详细信息 查看全文
- 作者：Valeriy V. Bolotov ; Vasiliy E. Kan ; kan@obisp.oscsbras.ru" class="auth_mail" title="E-mail the corresponding author ; Egor V. Knyazev ; Peter M. Korusenko ; Sergey N. Nesov ; Yuriy A. Sten'kin ; Viktor A. Sachkov ; Irina V. Ponomareva
- 关键词：Carbon nanotube ; Radial breathing mode ; Raman ; Chemical vapor deposition ; Microscopy
- 刊名：New Carbon Materials
- 出版年：2015
- 出版时间：October 2015
- 年：2015
- 卷：30
- 期：5
- 页码：385-390
- 全文大小：1112 K
文摘
MWCNTs grown by chemical vapor deposition on SiO2/Si substrates were investigated by Raman spectroscopy, transmission electron microscopy (TEM), Auger spectroscopy, and X-ray photoelectron spectroscopy before and after an annealing at 390 °C for 120 min in air or chemical treatment with a HCl solution. The Raman spectroscopy was focused on the low-frequency (250-300 cm−1) band. It is found that the positions and full widths at half maximum of the peaks forming the 250-300 cm−1 Raman band change little with the annealing or chemical treatment. The measured inner diameters of small-diameter CNTs from TEM agree well with those from Raman spectroscopy. These indicate that the low-frequency band originates from the radial breathing oscillations of carbon atoms in the inner walls of small-diameter MWCNTs.