title: Investigating the outskirts of Fe and Co catalyst particles in alumina-supported catalytic CVD carbon nanotube growth.
abstract: Using thermal CVD, the synthesis of multi-walled carbon nanotubes exhibiting roots anchored directly onto alpha-alumina supports, rather than the catalyst particle, is reported. At such roots, the alignment of the graphitic planes with the support lattice fringes depends on the support crystal structure and orientation. Surface defects may alter the reactivity of the surface or control the anchoring of supported atoms or nanoparticles. We argue this surface defect is provided by the catalyst particle's edge interaction with the support, in other words its circumference. The development of oxide-based catalysts is attractive in that they potentially provide an appropriate solution to directly integrate the synthesis of carbon nanotubes and graphene into silicon-based technology.
authors.affiliation: IFW Dresden, D-01171 Dresden, Germany. m.ruemmeli@ifw-dresden.de
authors.forename: Mark H
authors.initials: MH
authors.lastname: Rümmeli
authors.forename: Franziska
authors.initials: F
authors.lastname: Schäffel
authors.forename: Alicja
authors.initials: A
authors.lastname: Bachmatiuk
authors.forename: David
authors.initials: D
authors.lastname: Adebimpe
authors.forename: Geoff
authors.initials: G
authors.lastname: Trotter
authors.forename: Felix
authors.initials: F
authors.lastname: Börrnert
authors.forename: Andrew
authors.initials: A
authors.lastname: Scott
authors.forename: Emica
authors.initials: E
authors.lastname: Coric
authors.forename: Maria
authors.initials: M
authors.lastname: Sparing
authors.forename: Bernd
authors.initials: B
authors.lastname: Rellinghaus
authors.forename: Paul G
authors.initials: PG
authors.lastname: McCormick
authors.forename: Gianaurelio
authors.initials: G
authors.lastname: Cuniberti
authors.forename: Martin
authors.initials: M
authors.lastname: Knupfer
authors.forename: Ludwig
authors.initials: L
authors.lastname: Schultz
authors.forename: Bernd
authors.initials: B
authors.lastname: Büchner
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D014835:Volatilization
chemical_list: D037742:Nanotubes, Carbon; D010087:Oxides; D003035:Cobalt; D007501:Iron; D000537:Aluminum Oxide