Applied Physics Letters · 2007 · 61 citations · 20 references
NanosheetEngineeringLattice-oriented GrowthControlled Step/terrace StructureCrystal Growth TechnologyChemistryStep-templated GrowthSingle-walled Carbon NanotubesNanoscale ChemistryCarbon-based MaterialNanostructure SynthesisCarbon NanotubesMaterials ScienceNanotechnologyNanomanufacturingNanostructuringGrowth MechanismOne-dimensional MaterialNanomaterialsApplied PhysicsNanofabricationNanotubesNanostructures
The authors study the growth mechanism of single-walled carbon nanotubes (SWNTs) horizontally aligned on A-plane single crystal sapphire (112¯0) by making the controlled step/terrace structure. SWNT growth direction was sensitive to the surface geometry of the sapphire, and there was competition between two growth modes, lattice-oriented growth and step-templated growth. On the substrate with single-atomic steps, SWNTs aligned parallel to the [11¯00] direction as dominated by the lattice-oriented growth mode, while SWNTs aligned along the step edges when the double-atomic or higher steps were formed. Our findings have potential for the fabrication of designed architecture of SWNTs by combining these two growth modes.
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