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Title: Contribution of radicals and ions in catalyzed growth of single-walled carbon nanotubes from low-temperature plasmas

The growth kinetics of single-walled carbon nanotubes (SWCNTs) in a low-temperature, low-pressure reactive plasma is investigated using a multiscale numerical simulation, including the plasma sheath and surface diffusion modules. The plasma-related effects on the characteristics of SWCNT growth are studied. It is found that in the presence of reactive radicals in addition to energetic ions inside the plasma sheath area, the effective carbon flux, and the growth rate of SWCNT increase. It is shown that the concentration of atomic hydrogen and hydrocarbon radicals in the plasma plays an important role in the SWCNT growth. The effect of the effective carbon flux on the SWCNT growth rate is quantified. The dependence of the growth parameters on the substrate temperature is also investigated. The effects of the plasma sheath parameters on the growth parameters are different in low- and high-substrate temperature regimes. The optimum substrate temperature and applied DC bias are estimated to maximize the growth rate of the single-walled carbon nanotubes.
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [4] ;  [5] ;  [6] ;  [7] ;  [6]
  1. Physics Department, Faculty of Science, Sahand University of Technology, 51335-1996 Tabriz (Iran, Islamic Republic of)
  2. (Singapore)
  3. Plasma Sources and Applications Center, NIE, and Institute of Advanced Studies, Nanyang Technological University, 637616 Singapore (Singapore)
  4. Institute for Future Environments and School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000 (Australia)
  5. (PNCA), Manufacturing Flagship, CSIRO, P.O. Box 218, Lindfield, NSW 2070 (Australia)
  6. (Australia)
  7. (ISEM), University of Wollongong, NSW 2522 (Australia)
Publication Date:
OSTI Identifier:
22408031
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CARBON NANOTUBES; COMPUTERIZED SIMULATION; CONCENTRATION RATIO; CRYSTAL GROWTH; DIFFUSION; HYDROCARBONS; HYDROGEN; KINETICS; PLASMA SHEATH; PRESSURE RANGE KILO PA; SUBSTRATES; TAIL IONS; TEMPERATURE RANGE 0065-0273 K