|
|||||
|
|
Hydrogen adsorption on single-walled carbon nanotubes studied by core-level photoelectron spectroscopy and Raman spectroscopy |
|
| Authors: | A Tokura F Maeda A Yoshigoe Y Homma Y Kobayashi |
| Affiliation: | a NTT Basic Research Laboratories, NTT Corporation, and CREST, JST, 3-1 Morinosato Wakamiya, Atsugi-shi, Kanagawa 243-0198, Japan b Synchrotron Radiation Research Center, Japan Atomic Energy Agency, Sayo-gun, Hyogo 679-5148, Japan c Department of Physics, Tokyo University of Science, and CREST, JST, Shinjuku-ku, Tokyo 162-8601, Japan d Japan Synchrotron Radiation Research Institute, Sayo-gun, Hyogo 679-5148, Japan |
| Abstract: | We have investigated the adsorption of atomic hydrogen on vertically aligned carbon nanotube (CNT) films using in situ synchrotron-radiation-based core-level (CL) photoelectron spectroscopy and Raman spectroscopy. From C 1s CL spectra, we identified a CL peak component due to C-H bonds of carbon atoms in single-walled carbon nanotubes (SWCNTs). We also found the suppression of π-plasmon excitation, indicating that the hydrogen adsorption deforms the bonding structure. Raman spectra of the SWCNT film indicated that the radial-breathing-mode intensities of SWCNTs decreased due to the adsorption-induced bonding-structure deformation. Moreover, the decrease for small-diameter SWCNTs was more severe than that for large-diameter SWCNTs. Our results strongly suggest that the hydrogen adsorption, which induces the structure deformation from sp2 to sp3-like bonding, depends on the diameter of SWCNTs. |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ | |