Ferromagnetism of double-walled carbon nanotubes

Der-Chung Yan; Shih-Yun Chen; Maw-Kuen Wu; Chi, C. C.; Chao, J. H.; Green, Malcolm L. H.
June 2010
Applied Physics Letters;6/14/2010, Vol. 96 Issue 24, p242503
Academic Journal
The pure double-walled carbon nanotubes (DWNTs) and two endohedral DWNTs (DWNTs with materials filled inside) are produced. The filling materials are CoI2 and KI, respectively. The ferromagnetism (FM) is observed in pure DWNTs. The content of residual catalyst Fe is too small to be responsible for the observed FM. On the other hand, after filling KI or CoI2 into the tubes, over 87% of FM is suppressed. This suggests that the origin of FM in nanotubes is mainly from the hydrogen chemisorptions induced in the process of acid purification. With the knowledge of FM origin, it is then possible to enhance FM of carbon nanotubes or graphene for applications relying on magnetism.


Related Articles

  • A Comparative Study of Carbon Nanotubes Synthesized from Co/Zn/Al and Fe/Ni/Al Catalyst. DIKIO, EZEKIEL DIXON // E-Journal of Chemistry;2011, Vol. 8 Issue 3, p1014 

    The catalyst systems Fe/Ni/Al and Co/Zn/Al were synthesized and used in the synthesis of carbon nanotubes. The carbon nanotubes produced were characterized by Field Emission Scanning Electron Microscope (FESEM), Energy Dispersive x-ray Spectroscopy (EDS), Raman spectroscopy, Thermogravimetric...

  • Single atom identification by energy dispersive x-ray spectroscopy. Lovejoy, T. C.; Ramasse, Q. M.; Falke, M.; Kaeppel, A.; Terborg, R.; Zan, R.; Dellby, N.; Krivanek, O. L. // Applied Physics Letters;4/9/2012, Vol. 100 Issue 15, p154101 

    Using aberration-corrected scanning transmission electron microscope and energy dispersive x-ray spectroscopy, single, isolated impurity atoms of silicon and platinum in monolayer and multilayer graphene are identified. Simultaneously acquired electron energy loss spectra confirm the elemental...

  • Phenomenological Calculation of the Fe-Pd-Based L10-Ordered Phase in the Fe-Pd-Ni Ternary System. Horiuchi, T.; Igarashi, M.; Abe, F.; Ohkubo, K.; Miura, S.; Mohri, T. // Metallurgical & Materials Transactions. Part A;Aug2005, Vol. 36 Issue 8, p1999 

    A phenomenological calculation of phase equilibria by combining the cluster variation method (CVM) with the Lennard-Jones-type (L-J-type) pairwise atomic interaction energies has been attempted for the Fe-Pd-Ni ternary system in order to examine the possibility of Ni as the substituting element...

  • Paper-based ultracapacitors with carbon nanotubes-graphene composites. Jian Li; Xiaoqian Cheng; Jianwei Sun; Brand, Cameron; Shashurin, Alexey; Reeves, Mark; Keidar, Michael // Journal of Applied Physics;2014, Vol. 115 Issue 16, p164301-1 

    In this paper, a paper-based ultracapacitors were fabricated by the rod-rolling method with the ink of carbon nanomaterials, which were synthesized by arc discharge under various magnetic conditions. Composites of carbon nanostructures, including high-purity single-walled carbon nanotubes...

  • Characterization of nanometer-sized Pt-dendrite structures fabricated on insulator Al2O3 substrate by electron-beam-induced deposition. Guoqiang Xie; Minghui Song; Mitsuishi, Kazutaka; Furuya, Kazuo // Journal of Materials Science;May2006, Vol. 41 Issue 9, p2567 

    Nanometer-sized Pt-dendrite structures were fabricated on an insulator Al2O3 substrate using an electron-beam-induced deposition (EBID) process in a transmission electron microscope (TEM). The as-fabricated structures were characterized using conventional and high-resolution transmission...

  • Analytical study of raw Swarna Makshika (Chalcopyrite) and its Bhasma through TEM and EDAX. Mohapatra, Sudhaldev; Bhushan Jha, Chandra // AYU: An International Quarterly Journal of Research in Ayurveda;Apr-Jun2013, Vol. 34 Issue 2, p204 

    Ayurveda, the Indian System of Medicine deals with a number of metals and minerals. Swarna Makshika (SM), a chalcopyrite one such minerals has iron (Fe), copper (Cu), and sulphur (S) as major ingredients along with other trace elements of therapeutic importance. Studies related with...

  • Development of a TES Microcalorimeter with a Mushroom Shaped Absorber Deposited on an Insulating Layer in an Overhang Region. Maehata, K.; Iyomoto, N.; Yasumune, T.; Maeda, M.; Matsumura, S.; Hara, T.; Mitsuda, K.; Yamasaki, N.; Tanaka, K. // Journal of Low Temperature Physics;May2012, Vol. 167 Issue 3/4, p226 

    A 3×3+1 superconducting transition-edge sensor (TES) microcalorimeter-array has been developed for the energy dispersive spectrometer performed on a transmission electron microscope. For increasing sensitive area, each TES microcalorimeter consisted of a Ti/Au bilayer and a mushroom shaped...

  • Development of 4-Pixel-Array TES Microcalorimeters with Mushroom-Shaped Absorbers with Insulating Layers Supporting Overhang Regions. Maehata, K.; Iyomoto, N.; Maeda, M.; Ezaki, S.; Takano, A.; Matsumura, S.; Hara, T.; Mitsuda, K.; Yamasaki, N.; Tanaka, K. // Journal of Low Temperature Physics;Aug2014, Vol. 176 Issue 3/4, p578 

    A four-pixel-array superconducting transition-edge sensor (TES) microcalorimeter with a mushroom-shaped absorber was developed for energy dispersive spectroscopy performed on a transmission electron microscope. The TES consists of a bilayer of Au/Ti with either a 120- or 50-nm thickness. The...

  • Optical properties, morphology and elemental composition of atmospheric particles at T1 supersite on MILAGRO campaign. Carabali, G.; Mamani-Paco, R.; Castro, T.; Peralta, O.; Herrera, E.; Trujillo, B.; Baklanov, A. // Atmospheric Chemistry & Physics;2012, Vol. 12 Issue 5, p2747 

    Atmospheric particles were sampled at T1 supersite during MILAGRO campaign, in March 2006. T1 was located at the north of Mexico City (MC). Aerosol sampling was done by placing copper grids for Transmission Electron Microscope (TEM) on the last five of an 8-stage MOUDI cascade impactor. Samples...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics