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SYNTHESIS OF CARBON NANOTUBES BY SPRAY PYROLYSIS AND THEIR INVESTIGATION BY ELECTRON MICROSCOPY

Al. Darabont1,* , P. Nemes–Incze1, K. Kertész2, L. Tapasztó2, A. A. Koós2, Z. Osváth2, Zs. Sárközi1, Z. Vértesy2, Z. E. Horváth2, L. P. Biró1

Affiliation

  1. Faculty of Physics, Babe–Bolyai University
  2. MTA–MFA Research Institute for Technical Physics and Materials Science, Budapest, Hungary

Abstract

The present work is devoted to the synthesis of carbon nanotubes by spray pyrolysis method. This procedure is a version of CCVD method (Catalysed Chemical Vapour Deposition). Using a quartz reactor we have studied the influence of the history of the reactor wall surface, the lenght of the reactor and different aliphatic, saturated hydrocarbons as carbon sources on the quality and quantity of the final product. In order to study the influence of the reactor length on the quantity of the carbon nanotubes produced, we used two reactors of different lengths. The history of the reactor wall surface was determined by the purification process applied to the quartz reactor, which was realized with a mixture of hydrofluoric acid:nitric acid (1:1). This purification process changes the surface structure of the reactor wall, together with the catalyst, and determines the amount of the final product, which contains the carbon nanotubes. We have observed that part of the obtained carbon nanotubes have open endings. The samples obtained were purified and examined by TEM and STM..

Keywords

Carbon nanotubes, Pyrolysis, Electron microscopy.

Submitted at: Aug. 18, 2004
Accepted at: March 23, 2005

Citation

Al. Darabont, P. Nemes–Incze, K. Kertész, L. Tapasztó, A. A. Koós, Z. Osváth, Zs. Sárközi, Z. Vértesy, Z. E. Horváth, L. P. Biró, SYNTHESIS OF CARBON NANOTUBES BY SPRAY PYROLYSIS AND THEIR INVESTIGATION BY ELECTRON MICROSCOPY, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 2, pp. 631-636 (2005)