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ELIÁŠ, M. KLOC, P. JAŠEK, O. MAZÁNKOVÁ, V. TRUNEC, D. HRDÝ, R. ZAJÍČKOVÁ, L.
Original Title
Atmospheric pressure barrier discharge at high temperature: Diagnostics and carbon nanotubes deposition
Type
journal article in Web of Science
Language
English
Original Abstract
Atmospheric pressure dielectric barrier discharge (DBD) in Ar/H2 gas feed with C2H2 or CH4 admixture was studied at room and high temperature of 680 C by plasma diagnostics (electrical measurements, fast camera imaging, and optical emission spectroscopy). It was shown that filamentary DBD in pure Ar or Ar/H2 can be converted into homogeneous discharge by an acetylene admixture. Fast intensified charge-coupled device (ICCD) camera proved that this homogeneous discharge is an atmospheric pressure glow discharge (APGD) at room temperature whereas at high temperature the discharge mode switches at every half-period between APGD and atmospheric pressure Townsend discharge. The high temperature discharges (610–710 C) in Ar/ H2/C2H2 and Ar/H2/CH4 were also investigated with respect to a surface bound deposition of carbon nanotubes using 5 nm thick iron layer as a catalyst. CNTs were deposited without any dedicated catalyst pretreatment phase. The quality of CNTs, namely, their density, vertical alignment, and width of the diameter distribution, was better for the C2H2 gas feed and higher temperatures.
Keywords
Barrier discharge, carbon nanotubes, high temperature surface, plasma diagnostics
Authors
ELIÁŠ, M.; KLOC, P.; JAŠEK, O.; MAZÁNKOVÁ, V.; TRUNEC, D.; HRDÝ, R.; ZAJÍČKOVÁ, L.
RIV year
2015
Released
9. 3. 2015
Publisher
AIP Publishing
ISBN
0021-8979
Periodical
Journal of Aplied Physics
Year of study
117
Number
10
State
United States of America
Pages from
103301-1
Pages to
103301-10
Pages count
URL
http://dx.doi.org/10.1063/1.4914062