Modifying the electronic properties of multi-wall carbon nanotubes via charge transfer, by chemical doping with some inorganic fluorides

• Published in: Chemical physics letters Vol. 381; no. 3; pp. 306 - 314
• Main Authors: Giraudet, J, Dubois, M, Claves, D, Pinheiro, J.P, Schouler, M.C, Gadelle, P, Hamwi, A
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 14-11-2003; Elsevier Science; Elsevier
• Subjects: Chemical Sciences; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Materials science; Nanoscale materials and structures: fabrication and characterization; Nanotubes; Physics; Transport properties; Carbon nanotubes; Fluorine compounds; Intercalation compounds; NMR spectra; Experimental study; Chemical reactivity; Chemical synthesis; Charge transfer; Nanostructured materials; EPR spectra; Inorganic fluorides; Carbon nanotubes Inorganic fluorides Intercalation; Intercalation
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/j.cplett.2003.09.134

The reactivity of multi-walled carbon nanotubes with some inorganic fluorides (BF
3, TiF
4, NbF
5 and WF
6) has been studied. The accommodation of the fluorinated species into the carbon lattice has been shown to result from intercalation and adsorption/condensation phenomena. Charge transfer, induced by such a chemical doping, has been clearly evidenced by
19F NMR and ESR spectroscopy. The doped materials exhibit insulating properties. Due to a restriction in size of the intercalated domains, the opportunity of achievement of a homogeneous doping level and of resulting isotropic 1D transport properties in chemically modified carbon nanotubes is discussed.