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  • Nano Express
  • Open Access

Single step process for the synthesis of carbon nanotubes and metal/alloy-filled multiwalled carbon nanotubes

  • 1,
  • 1 and
  • 1Email author
Nanoscale Research Letters20072:75

  • Received: 13 September 2006
  • Accepted: 1 December 2006
  • Published:


A single-step approach for the synthesis of multi-walled nanotubes (MWNT) filled with nanowires of Ni/ternary Zr based hydrogen storage alloy has been illustrated. We also demonstrate the generation of CO-free hydrogen by methane decomposition over alloy hydride catalyst. The present work also highlights the formation of single-walled nanotubes (SWNT) and MWNTs at varying process conditions. These carbon nanostructures have been characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), high resolution TEM (HRTEM), Energy dispersive X-ray analysis (EDX) and Raman spectroscopy. This new approach overcomes the existing multi-step process limitation, with possible impact on the development of future fuel cell, nano-battery and hydrogen sensor technologies.


  • Carbon nanotubes
  • Nanowires
  • Encapsulation
  • Hydrogen production
  • Alloys
  • Chemical vapour deposition




We gratefully acknowledge financial support received from DRDO, RCI, NMRL and MHRD, Govt. of India for the present work.

Authors’ Affiliations

Department of Physics, Alternative Energy Technology Laboratory, Indian Institute of Technology Madras, Chennai, Tamilnadu, 600036, India


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