The carbon nanotubes (CNTs) can be classified as the 1-D crystals. The catalytic chemical vapor deposition (CCVD) and carbon arc plasma sublimation of graphite are at present the most explored ways of CNTs production on a large scale. Whether the products are single- or multi-walled carbon nanotubes (SWCNTs and MWCNTs, respectively) it depends on the selection of the catalyst and process conditions. In the case of the CCVD method the starting carbon bearing materials also play a crucial role for the final product. In fact, there is a large variety of liquids and gaseous hydrocarbons that can be used for efficient CNTs synthesis.

The objective of this work was the synthesis of the SWCNTs from ferrocene aliphatic alcohol solutions by the CCVD method. The influence of alkyl chain length on the SWCNTs synthesis was investigated. The alcohols were injected to the reactor, a quartz tube placed in a furnace, in the liquid phase or as an aerosol. The carrier gas was Ar. The feeding rate, digitally controlled, was varied between 0.1 and 3 ml s^-1. Also the temperature distribution along the furnace was the variable parameter.

The morphology of the obtained products were investigated by scanning and transmission electron microscopy (SEM and TEM, respectively). The quality of the CNTs were also analyzed by using the Raman spectroscopy.

An example of SEM image and Raman spectrum of SWCNT product obtained from pentanol are shown in figure below, left and right respectively.

Acknowledgment

This work was supported by the Ministry of Science and Education through the Department of Chemistry, Warsaw University under Grant No. N204 096 31/2160.

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