title: Predominant (6,5) single-walled carbon nanotube growth on a copper-promoted iron catalyst.
abstract: We have developed a magnesia (MgO)-supported iron-copper (FeCu) catalyst to accomplish the growth of single-walled carbon nanotubes (SWNTs) using carbon monoxide (CO) as the carbon source at ambient pressure. The FeCu catalyst system facilitates the growth of small-diameter SWNTs with a narrow diameter distribution. UV-vis-NIR optical absorption spectra and photoluminescence excitation (PLE) mapping were used to evaluate the relative quantities of the different (n,m) species. We have also demonstrated that the addition of Cu to the Fe catalyst can also cause a remarkable increase in the yield of SWNTs. Finally, a growth mechanism for the FeCu-catalyzed synthesis of SWNTs has been proposed.
authors.affiliation: Department of Biotechnology and Chemical Technology, School of Science and Technology, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland. maoshuai.he@hut.fi
authors.forename: Maoshuai
authors.initials: M
authors.lastname: He
authors.forename: Alexander I
authors.initials: AI
authors.lastname: Chernov
authors.forename: Pavel V
authors.initials: PV
authors.lastname: Fedotov
authors.forename: Elena D
authors.initials: ED
authors.lastname: Obraztsova
authors.forename: Jani
authors.initials: J
authors.lastname: Sainio
authors.forename: Emma
authors.initials: E
authors.lastname: Rikkinen
authors.forename: Hua
authors.initials: H
authors.lastname: Jiang
authors.forename: Zhen
authors.initials: Z
authors.lastname: Zhu
authors.forename: Ying
authors.initials: Y
authors.lastname: Tian
authors.forename: Esko I
authors.initials: EI
authors.lastname: Kauppinen
authors.forename: Marita
authors.initials: M
authors.lastname: Niemelä
authors.forename: A Outi I
authors.initials: AO
authors.lastname: Krause
mesh_terms: D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D037742:Nanotubes, Carbon; D013056:Spectrophotometry, Ultraviolet; D019265:Spectroscopy, Near-Infrared; D014961:X-Ray Diffraction
chemical_list: D037742:Nanotubes, Carbon; D003300:Copper; D007501:Iron