Inverse photoemission spectroscopy of multiwall carbon nanotubes
AUTOR(ES)
Hevia, Samuel, Ibáñez, Wladimir, Segura, Rodrigo, Häberle, Patricio
FONTE
Brazilian Journal of Physics
DATA DE PUBLICAÇÃO
2006-09
RESUMO
Multiwall Carbon Nanotubes (MWCNTs) were synthesized by Chemical Vapor Deposition (CVD). Two different procedures were used to grow MWCNT films roughly, aligned in the direction normal to the SiO2/Si(111) substrate. Inverse Photoemission Spectroscopy measurements, on these samples, show the existence of resonances which could be traced back to a flat graphene sheet. The unoccupied valence band is fairly similar to that shown by graphite except by an additional intensity in the vicinity of the Fermi level. This resonance could be interpreted both as tubes tips end effects or van Hove singularities in the density of states.
Documentos Relacionados
- Transient heat conduction in multiwall carbon nanotubes
- Production of TiO2 Coated Multiwall Carbon Nanotubes by the Sol-Gel Technique
- Highly selective and sensitive voltammetric sensor for captopril determination based on modified multiwall carbon nanotubes paste electrode
- Espectroscopia Raman ressonante em nanotubos de carbono funcionalizados.
- Carbon nanotubes: From macromolecules to nanotechnology