Special Section on Nanocarbon Photonics and Optoelectronics

Investigation of defectiveness of multiwalled carbon nanotubes produced with Fe–Co catalysts of different composition

[+] Author Affiliations
Sofya N. Bokova-Sirosh, Elena D. Obraztsova

A. M. Prokhorov General Physics Institute RAS, 38 Vavilov Street, Moscow 119991, Russia

National Research Nuclear University MEPhI, Kashirskoe shosse, 31, Moscow 115409, Russia

Vladimir L. Kuznetsov

Boreskov Institute of Catalysis SB RAS, Lavrentieva Avenue 5, Novosibirsk 630090, Russia

Novosibirsk State University, Pirogova Avenue 2, Novosibirsk 630090, Russia

National Tomsk State University, 36, Lenina Avenue, Tomsk 634050, Russia

Anatoly I. Romanenko

Nikolaev Institute of Inorganic Chemistry, SB RAS, Lavrentieva Avenue 3, Novosibirsk 630090, Russia

National Tomsk State University, 36, Lenina Avenue, Tomsk 634050, Russia

Mariya A. Kazakova, Dmitry V. Krasnikov

Boreskov Institute of Catalysis SB RAS, Lavrentieva Avenue 5, Novosibirsk 630090, Russia

Novosibirsk State University, Pirogova Avenue 2, Novosibirsk 630090, Russia

Evgeniy N. Tkachev

Nikolaev Institute of Inorganic Chemistry, SB RAS, Lavrentieva Avenue 3, Novosibirsk 630090, Russia

Yury I. Yuzyuk

Southern Federal University, Faculty of Physics, 5 Zorge Street, Rostov-on-Don 344090, Russia

J. Nanophoton. 10(1), 012526 (Mar 07, 2016). doi:10.1117/1.JNP.10.012526
History: Received October 15, 2015; Accepted February 11, 2016
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Abstract.  We have performed a study of CVD multiwalled carbon nanotubes (MWCNTs) produced with Fe–Co catalysts with a variable ratio of active metals. The Raman data were considered in combination with the temperature dependence of MWCNT conductivity. The data analysis is based on the point that the value of I2D/ID ratio correlates with the graphene fragment size. The fragments are considered as building blocks of MWCNTs. We showed that MWCNT defectiveness depends on the ratio of bimetallic active components in the Fe–Co catalyst. Thus, the ratio of I2D/ID increases and the D-mode intensity decreases while the Fe content in the catalyst increases. This also points to the reduction of defect number in the bigger graphene fragments. These results correlate with the data on conductivity temperature dependence. Namely, the increase of Fe content in the active component of the Fe–Co catalyst results in the increase of charge carrier concentration, which, in turn, indicates a decrease in MWCNT defectiveness.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Sofya N. Bokova-Sirosh ; Vladimir L. Kuznetsov ; Anatoly I. Romanenko ; Mariya A. Kazakova ; Dmitry V. Krasnikov, et al.
"Investigation of defectiveness of multiwalled carbon nanotubes produced with Fe–Co catalysts of different composition", J. Nanophoton. 10(1), 012526 (Mar 07, 2016). ; http://dx.doi.org/10.1117/1.JNP.10.012526


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