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

Abstract

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

Citation Formats

Marvi, Z., Plasma Sources and Applications Center, NIE, and Institute of Advanced Studies, Nanyang Technological University, 637616 Singapore, Xu, S., Foroutan, G., Ostrikov, K., Plasma Nanoscience Center Australia, Plasma Nanoscience, School of Physics, University of Sydney, Sydney, NSW 2006, Institute for Superconducting and Electronic Materials, and School of Physics and Advanced Materials, University of Technology Sydney, Sydney, NSW 2006. Contribution of radicals and ions in catalyzed growth of single-walled carbon nanotubes from low-temperature plasmas. United States: N. p., 2015. Web. doi:10.1063/1.4905522.
Marvi, Z., Plasma Sources and Applications Center, NIE, and Institute of Advanced Studies, Nanyang Technological University, 637616 Singapore, Xu, S., Foroutan, G., Ostrikov, K., Plasma Nanoscience Center Australia, Plasma Nanoscience, School of Physics, University of Sydney, Sydney, NSW 2006, Institute for Superconducting and Electronic Materials, & School of Physics and Advanced Materials, University of Technology Sydney, Sydney, NSW 2006. Contribution of radicals and ions in catalyzed growth of single-walled carbon nanotubes from low-temperature plasmas. United States. doi:10.1063/1.4905522.
Marvi, Z., Plasma Sources and Applications Center, NIE, and Institute of Advanced Studies, Nanyang Technological University, 637616 Singapore, Xu, S., Foroutan, G., Ostrikov, K., Plasma Nanoscience Center Australia, Plasma Nanoscience, School of Physics, University of Sydney, Sydney, NSW 2006, Institute for Superconducting and Electronic Materials, and School of Physics and Advanced Materials, University of Technology Sydney, Sydney, NSW 2006. Thu . "Contribution of radicals and ions in catalyzed growth of single-walled carbon nanotubes from low-temperature plasmas". United States. doi:10.1063/1.4905522.
@article{osti_22408031,
title = {Contribution of radicals and ions in catalyzed growth of single-walled carbon nanotubes from low-temperature plasmas},
author = {Marvi, Z. and Plasma Sources and Applications Center, NIE, and Institute of Advanced Studies, Nanyang Technological University, 637616 Singapore and Xu, S. and Foroutan, G. and Ostrikov, K. and Plasma Nanoscience Center Australia and Plasma Nanoscience, School of Physics, University of Sydney, Sydney, NSW 2006 and Institute for Superconducting and Electronic Materials and School of Physics and Advanced Materials, University of Technology Sydney, Sydney, NSW 2006},
abstractNote = {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.},
doi = {10.1063/1.4905522},
journal = {Physics of Plasmas},
number = 1,
volume = 22,
place = {United States},
year = {Thu Jan 15 00:00:00 EST 2015},
month = {Thu Jan 15 00:00:00 EST 2015}
}