期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 113, 期 37, 页码 16408-16413出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp905312b
关键词
-
资金
- GACRDFG [203/07/J067]
- Academy of Sciences of the Czech Republic [IAA400400911, IAA400400804, KAN200100801]
- Czech Ministry of Education, Youth and Spoils [LC-510]
In situ Raman spectroelectrochemistry has been used to probe the E-11(s) and E-22(s) electronic transitions of the semiconducting single walled carbon nanotube tube (6,5). These two transitions were investigated through the intensities of the radial breathing mode by using 1.16 and 2.18 eV laser excitation energies, respectively. The bleaching behavior of the (6,5) tube is similar for both laser excitation energies if the magnitude of the applied electrode potential is smaller than about +/- 0.5 V. At potentials outside the 0.5 V window, the intensity/potential profile is steeper for the 1.16 eV laser excitation. But a significant bleaching of the Raman signal is observed also for the 2.18 eV laser excitation energy even at mild potentials. This behavior shows that the filling of the E, is electronic state has a strong impact also oil the E-22(s) electronic transition. Hence, we suggest that a broadening of the resonance profile of E-22(s) is a major reason for the change of the resonance enhancement of the Raman spectra before the Fermi level reaches the energy of E-22(s) transition.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据