Selective synthesis of double helices of carbon nanotube bundles grown on treated metallic substrates

Felipe Cervantes-Sodi, Agustín Íñiguez-Rábago, Samuel Rosas-Meléndez, Mónica Ballesteros-Villarreal, Juan J. Vilatela, Lucio G. Reyes-Gutiérrez, Eduardo Palacios, Mauricio Terrones, José A. Jiménez-Rodríguez

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Double-helix microstructures consisting of two parallel strands of hundreds of multi-walled carbon nanotubes (MWCNTs) have been synthesized by chemical vapour deposition of ferrocene/toluene vapours on metal substrates. Growth of coiled carbon nanostructures with site selectivity is achieved by varying the duration of thermochemical pretreatment to deposit a layer of SiOx on the metallic substrate. Production of multibranched structures of MWCNTs converging in SiOx microstructure is also reported. In the abstract figure, panel (a) shows a coloured micrograph of a typical double-helix coiled microstructure of MWCNTs grown on SiOx covered steel substrate. Green and blue show each of the two individual strands of MWCNTs. Panel (b) is an amplification of a SiOx microparticle (white) on the tip of the double-stranded coil (green and blue). The microparticle guides the collective growth of hundreds of MWCNTs to form the coiled structure.

Original languageEnglish (US)
Pages (from-to)2382-2385
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Issue number12
StatePublished - Dec 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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