High temperature growth of single-walled carbon nanotubes with a narrow chirality distribution by tip-growth mode

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

  • Qingdao University of Science and Technology
  • Shandong University of Science and Technology
  • Huaihai Institute of Technology
  • Jiangsu University of Science and Technology
  • RAS - General Physics Institute

Kuvaus

An MgO supported Co catalyst prepared by atomic layer deposition was applied for the growth of single-walled carbon nanotubes (SWNTs). Different from other catalysts, which generally nucleate SWNTs by base-growth mode, the Co-MgO catalyst uniquely generates SWNTs by tip-growth mode, indicating a weak metal-support interaction. During chemical vapor deposition process, the lift-off of Co nanoparticles from support inhibits the aggregation of Co nanoparticles and favors the synthesis of small-diameter SWNTs with a narrow chirality distribution, even at a high reaction temperature. Particularly, product grown at 800 °C maintains a preferential synthesis of small-diameter (6, 5) SWNTs. The enrichment of (6, 5) SWNT arises from the combination of SWNT-catalyst interface thermodynamics with growth kinetic. The growth dynamics of SWNTs was further investigated by in situ Raman spectroscopy, which revealed that SWNTs with smaller diameters appeared prior to the growth of large-diameter counterparts.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut344-350
Sivumäärä7
JulkaisuChemical Engineering Journal
Vuosikerta341
TilaJulkaistu - 1 kesäkuuta 2018
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 18917012