Bonding changes in single wall carbon nanotubes (SWCNT) on Ti and TiH2 addition probed by X-ray Raman scattering

作者：Kumar Ravhi S^*; Cornelius Andrew L; Pravica Michael G; Nicol Malcolm F; Hu Michael Y; Chow Paul C

来源：Diamond and Related Materials, 2007, 16(4-7): 1136-1139.

DOI：10.1016/j.diamond.2006.12.047

• single wall carbon nanotubes (SWCNT)
• mechanical grinding
• X-ray Raman scattering

Single wall carbon nanotubes (SWCNT) were ball milled with Ti and TiH2. Samples collected at different milling times were characterized by X-ray diffraction, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray Raman spectroscopy (XRS). While the intensity of the pi* excitonic transition of the Ti+SWCNT samples remains unchanged with milling time, a doublet feature observed around 285.4 eV in the X-ray Raman spectra of the 5 h milled sample shows increasing hybridization of the Ti states with the nanotubes above the Fermi level. On the other hand, in addition to a double peak nature, the XRS spectra of TiH2+SWCNT samples show a decrease in the pi* intensity which provides clear evidence for increasing sp(3) hybridization with milling time.

• 出版日期2007-7