Open AccessX‐ray absorption studies of carbon‐related materials
Author(s) -
Pong W. F.,
Yueh C. L.,
Chang Y. D.,
Tsai M.H.,
Chang Y. K.,
Chen Y. Y.,
Lee J. F.,
Wei S. L.,
Wen C. Y.,
Chen L. C.,
Chen K. H.,
Lin I. N.,
Cheng H. F.
Publication year - 2001
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049500019750
Subject(s) - xanes , dopant , diamond , materials science , analytical chemistry (journal) , absorption (acoustics) , carbon fibers , extended x ray absorption fine structure , x ray absorption fine structure , graphite , spectral line , doping , carbon nanotube , absorption spectroscopy , chemistry , spectroscopy , nanotechnology , composite material , optics , optoelectronics , organic chemistry , quantum mechanics , astronomy , composite number , physics
X‐ray absorption near‐edge structure (XANES) measurements have been performed on nitrogen‐doped diamond films with three different dopant concentrations and iron‐layer‐stabilized carbon nanotube (CNT) structures with various diameters at the C K ‐absorption edge using the sample drain current mode. The C K ‐edge XANES spectra of these N‐doped diamond films resemble that of the undoped diamond regardless of the dopant concentration, which suggest that the overall bonding configuration of the C atom is unaltered. N dopants are found to reduce the intensities of both the sp 2 ‐ and sp 3 ‐bond‐derived resonance features in the XANES spectra. On the other hand, the C K ‐edge XANES spectra of CNTs indicate that the intensities of the π* and σ* bands and the interlayer‐state features vary with the diameter of the CNT. This phenomenon may be caused by the Fe‐layer‐catalysed bending of the graphite sheet and the interaction between C and Fe atoms.