Control of growth orientation for carbon nanotubes

Applied Physics Letters

Volumn 82, Issue 3, 2003, Pages 448-450

  Lee, Ki Hong ^a   Cho, Jeong Min ^a   Sigmund, Wolfgang ^a  

^a UNIVERSITY OF FLORIDA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CATALYSTS; CHEMICAL VAPOR DEPOSITION; FERROMAGNETISM; FIELD EFFECT TRANSISTORS; IRON; MAGNETIC FIELD EFFECTS; SILICON COMPOUNDS;

NANOPARTICLES;

CARBON NANOTUBES;

EID: 0037455371     PISSN: 00036951     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.1535269     Document Type: Article

References (12)

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10. 5 was added to 6.0 g of TOPO at 330 °C under argon atmosphere, and then aged for 30 min at the same temperature. The reaction mixture was added to excess ethanol and centrifuged several times. Transmission electron microscopy showed iron nanoparticles with diameters from 10 to 20 nm.
11. Iron nanoparticles have a strong tendency to' agglomerate because of their magnetic characteristics and high specific surface energy. Therefore, the slurry is ultrasonicated before dipping the substrates.
12. A quartz tube that is 1.5 in. in diameter and 48 in. in length was used for the CVD furnace. The substrate temperature was increased by 6 °C/min up to the growth temperature in argon atmosphere with a flowing speed of 600 sccm, On reaching growth temperature, the furnace temperature was held constant for 10 min, then annealed in hydrogen (50 sccm) and argon (1000 sccm) before growth of the CNTs. After growing the CNTs, the furnace was cooled to room temperature in argon (600 sccm).