Resonance Raman scattering of boron carbonitride nanotubes

Zhi, C.Y.; Bai, X.D.; Wang, E.G.
March 2004
Applied Physics Letters;3/1/2004, Vol. 84 Issue 9, p1549
Academic Journal
Resonance Raman spectra of boron carbonitride (BCN) nanotubes synthesized by hot-filament chemical vapor deposition were investigated. The intensity of the D band is insensitive to laser excitation energy (E[sub laser]), while the intensity of the G and G[sup ′] bands increases as E[sub laser] increases, and saturates at E[sub laser]=2.67 eV. This particular resonance behavior is ascribed to an electronic transition process different from the π–π[sup *] transition that occurs in carbon materials. The dispersive behavior of the D-related bands also shows an inflection at E[sub laser]=2.67 eV and different ∂ω/∂E[sub laser] compared to carbon materials. These results indicate there are special electronic and phonon structures in BCN nanotubes. © 2004 American Institute of Physics.


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