title: Growth of carbon nanotubes on Si substrate using Fe catalyst produced by pulsed laser deposition.
abstract: We report the growth of carbon nanotubes on the size controlled iron catalytic nanoparticles. The nanotubes were grown by thermal chemical vapour deposition (CVD) in the temperature range 600-850 degrees C. The Fe films were deposited on silicon by pulsed laser deposition in vacuum. Atomic force microscopy measurements were performed on the catalytic nanoparticles. The topography of the catalytic nanoparticles shows the homogenous distribution of Fe catalyst. We observe the nanotubes are produced only at temperatures between 650 and 800 degrees C, and within this narrow temperature regime the yield of nanotubes reaches a maximum around 750 degrees C and then declines. Raman measurements illustrate a high G/D peak ratio indicating good nanotube quality. By further defining the size of the catalyst the diameter of these carbon nanotubes can be controlled.
authors.affiliation: School of Physics, Trinity College Dublin, Dublin 2, Ireland.
authors.forename: S
authors.initials: S
authors.lastname: Krishnamurthy
authors.forename: T
authors.initials: T
authors.lastname: Donnelly
authors.forename: N
authors.initials: N
authors.lastname: McEvoy
authors.forename: W
authors.initials: W
authors.lastname: Blau
authors.forename: J G
authors.initials: JG
authors.lastname: Lunney
authors.forename: A S
authors.initials: AS
authors.lastname: Teh
authors.forename: K B K T
authors.initials: KB
authors.lastname: Teo
authors.forename: W I
authors.initials: WI
authors.lastname: Milne
mesh_terms: D002384:Catalysis; D003460:Crystallization / Q000379:methods*; D007501:Iron / Q000737:chemistry*; D007834:Lasers; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D012825:Silicon / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances; D007501:Iron; D012825:Silicon