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

被引：23
|
作者：
Bokova-Sirosh, Sofya N. [1 ,2 ]
Kuznetsov, Vladimir L. [3 ,4 ,6 ]
Romanenko, Anatoly I. [5 ,6 ]
Kazakova, Mariya A. [3 ,4 ]
Krasnikov, Dmitry V. [3 ,4 ]
Tkachev, Evgeniy N. [5 ]
Yuzyuk, Yury I. [7 ]
Obraztsova, Elena D. [1 ,2 ]
机构：
[1] AM Prokhorov Gen Phys Inst RAS, 38 Vavilov St, Moscow 119991, Russia
[2] Natl Res Nucl Univ MEPhI, 31 Kashirskoe Shosse, Moscow 115409, Russia
[3] Boreskov Inst Catalysis SB RAS, Lavrentieva Ave 5, Novosibirsk 630090, Russia
[4] Novosibirsk State Univ, Pirogova Ave 2, Novosibirsk 630090, Russia
[5] SB RAS, Nikolaev Inst Inorgan Chem, Lavrentieva Ave 3, Novosibirsk 630090, Russia
[6] Natl Tomsk State Univ, 36 Lenina Ave, Tomsk 634050, Russia
[7] Southern Fed Univ, Fac Phys, 5 Zorge St, Rostov Na Donu 344090, Russia
来源：
JOURNAL OF NANOPHOTONICS | 2016年 / 10卷 / 01期
基金：
俄罗斯基础研究基金会;
关键词：
multiwalled carbon nanotubes; Raman spectroscopy; temperature dependence of conductivity; Fe-Co catalysts with variable ratio of active metals; RAMAN-SPECTRA; CONDUCTIVITY; GRAPHENE; DIAMOND;
D O I：
10.1117/1.JNP.10.012526
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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 I-2D/I-D 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 I-2D/I-D 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. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
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页数：10
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