Preparation and characterization of α-Fe nanowires located inside double wall carbon nanotubes

Jose Jorge (1) , Emmanuel Flahaut (2) , Fernando Gonzalez-Jimenez (1) , Gema Gonzalez (3) , Jesus Gonzalez (4) , Edgar Belandria (4) , Jean-Marc Broto (5) , Bertrand Raquet (5)

1 UCV - Universidad Central de Venezuela
2 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
3 IVIC - Centro de Fisica
4 ULA - Universidad de Los Andes [Mérida, Venezuela]
5 LNCMP - Laboratoire National des Champs Magnétiques Pulsés

Capillary effect was used to fill double wall carbon nanotubes (DWCNT) with iron. The samples are characterized by Mössbauer and Raman spectroscopies, TEM, SAED, and magnetization. The experimental results indicate the presence of a-Fe nanowires inside the DWCNTs. The samples are ferromagnetic at room temperature. There are three striking results due to the confinement effects on the physical behavior of a-Fe: the hyperfine fields increase, the Debye temperature decreases and Raman modes are observed.

Mots clés: Double wall carbon nanotubes; DWCNT; Mössbauer; Raman spectroscopies; TEM; SAED; Magnetization

Domaines: Matériaux

Jose Jorge, Emmanuel Flahaut, Fernando Gonzalez-Jimenez, Gema Gonzalez, Jesus Gonzalez, et al.. Preparation and characterization of α-Fe nanowires located inside double wall carbon nanotubes. Chemical Physics Letters, 2008, 457 (4), pp.347-351. ⟨10.1016/j.cplett.2008.04.019⟩. ⟨hal-03590883⟩