Direct synthesis of multi-walled and single-walled carbon nanotubes by spray-pyrolysis

L. P. Biró, Z. E. Horváth, A. A. Koós, Z. Osváth, Z. Vértesy, Al Darabont, K. Kertész, C. Neamţu, Zs Sárközi, L. Tapasztó

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Abstract

In the present paper we report the simultaneous synthesis of single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) by spray-pyrolysis, a type of chemical vapour deposition (CVD) method. The technical characteristics of the home-made experimental set-up are given. The synthesis involves the spray-pyrolysis of ferrocene (Fe(C5H 5)2) in benzene (C6H6) solution in Ar atmosphere. The effects of the following characteristic parameters of the spray-pyrolysis process were studied: the temperature in the reaction tube, the ferrocene concentration, and the flow-rate of the ferrocene-benzene solution. The obtained samples (carbonaceous material deposited on the walls of the reaction tube) were analysed by Transmission Electron Microscopy (TEM) and Scanning Tunneling Microscopy (STM). From the obtained TEM and STM images we concluded that the best values of the studied parameters, regarding both the quality and quantity of the as grown carbon nanotubes, are: (i) ferrocene concentration - 3 g ferrocene in 50 ml benzene; (ii) flow-rate of the ferrocene-benzene solution- 1 ml/min; (iii) reaction tube temperature in the 875-925 °C range.

Original languageEnglish
Pages (from-to)661-666
Number of pages6
JournalJournal of Optoelectronics and Advanced Materials
Volume5
Issue number3
Publication statusPublished - Sep 2003

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Keywords

  • Carbon nanotubes
  • Ferrocene catalyst
  • STM
  • Spray-pyrolysis
  • TEM

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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