| Summary: | The effects of temperature on carbon nanotubes (CNTs) by thermal chemical vapordeposition (TCVD) method were systematically studied. Natural hydrocarbon source; palm oil wasused as precursor and argon as carrier gas. Palm oil vaporized optimally at 450°C in ambientpressure. The synthesis temperature start at 650°C and were increased at rate of 50°C for series ofsamples until it reaches maximum temperature of 900°C. The samples were grown on nickel nitrate,which was coated on silicon substrate. The CNTs characteristics were studied using field emissionscanning electron microscopy (FESEM), Raman and infrared (IR) spectroscopy. The experimentalresults revealed that CNTs properties are highly dependent on temperature. It was found that withincreasing synthesis temperature, the CNTs diameter decreased initially and then increased afterpassing an optimum synthesis temperature of 750°C. The bamboo like structure were obviouslyfound at higher synthesis temperature 800°C-850°C while there were few CNTs seen at 900°C. © (2013) Trans Tech Publications, Switzerland.
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