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Chinese Physics, 2006, Vol. 15(11): 2761-2764    DOI: 10.1088/1009-1963/15/11/051
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev  

Photoluminescence of multiwalled carbon nanotubes excited at different wavelengths

Yuan Yan-Hong(袁艳红)a)b)†, Miao Run-Cai(苗润才)c), Bai Jin-Tao(白晋涛)b), and Hou Xun(侯洵)b)d)
a Department of Arts & Science, Shanghai Dianji University, Shanghai 200240, Chinab Institute of Photonics & Photon-Technology, and Provincial Key Laboratory of Photoelectronic Technology, Northwest University, Xi'an 710069, China; c Shaanxi Yulin College, Yulin 719000, China; d State Key Laboratory of Transient Optics & Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710068, China
Abstract  In this paper the multiwalled carbon nanotubes (MWNTs) were synthesized by a chemical vapour deposition and the SEM graph shows that the sample has good construction. The micro-Raman spectrum shows the characteristic line of the MWNTs and an additional line produced by the defects on the outer surface of MWNTs. The photoluminescence (PL) spectra observed experimentally are variable under different excitation wavelengths and the strong excitation wavelength dependence of luminescence indicates a distribution of emitters which include electron $\pi$ in excited states and the Van Hove singularities. The absorption spectra confirm the transition channels which are consistent with the PL emission.
Keywords:  multiwalled carbon nanotubes      photoluminescence      excitation  
Received:  19 December 2005      Revised:  23 June 2006      Accepted manuscript online: 
PACS:  78.67.Ch (Nanotubes)  
  78.30.-j (Infrared and Raman spectra)  
  78.55.-m (Photoluminescence, properties and materials)  
  81.07.De (Nanotubes)  
  81.16.Be (Chemical synthesis methods)  

Cite this article: 

Yuan Yan-Hong(袁艳红), Miao Run-Cai(苗润才), Bai Jin-Tao(白晋涛), and Hou Xun(侯洵) Photoluminescence of multiwalled carbon nanotubes excited at different wavelengths 2006 Chinese Physics 15 2761

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