• Dr. Tapan Dash
• T. Dash, R. K. Sahu
• V. Mukherjee
• S. K. Pradhan
• 4T. K. Rout, 3B.B. Palei, 3A.K. Sahu, 2S. K. Biswal, 3S.K. Biswal, 5B. B. Nayak

We developed a low-cost approach to prepare high-quality multi-walled carbon nano tubes (MWCNTs) using direct current (dc) arc discharge in Ar atmosphere. Multiwall carbon nano material (MWNT)/tubes were synthesized by arc plasma melting of graphite samples followed by in situ cooling has been carried out by employing a special 50 kW dc arc reactor. Graphite material was also chosen for preparing both electrode and crucible because of high temperature involved in carrying plasma melting experiments of samples. Carbon nano tubes of various forms have been found to grow in various plasma treated samples. A bunch of whisker structure (containing nano tubes) was formed on the electrode tip and bottom and wall of the crucible. Evaluation of properties of nano tubes has been identified by XRD, TEM and micro Raman studies. Electrical conductivity value (measured by four probe method) of arc plasma treated graphite samples has been found to increase in comparison to untreated graphite. This achievement is the consequence of formation of nano tubes in the plasma treated graphite samples. This process is quite favorable for the formation of nano tubes due to the easier condensation of carbon vapor quickly in the arc region. Fine MWCNTs with random orientation are obtained.

carbon nano tubes; arc plasma; electrical conductivity; microstructure

"Synthesis of multi walled carbon nano tubes by arc plasma discharge method and their characterizations", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 12, page no.182-190, December-2018, Available :http://www.jetir.org/papers/JETIR1812928.pdf

"Synthesis of multi walled carbon nano tubes by arc plasma discharge method and their characterizations", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 12, page no. pp182-190, December-2018, Available at : http://www.jetir.org/papers/JETIR1812928.pdf