Effect of Reaction Temperature on Carbon Yield and Morphology of CNTs on Copper Loaded Nickel Nanoparticles

Abstract

This investigation was attempted to introduce carbon nanotubes (CNTs) onto surface of copper powders in order to improve heat transfer performance of copper matrix for engineering application of electrical packaging materials. The Ni/MgO catalyst was formed on the copper powders surface by means of codeposition method. CVD technique was executed to fabricate uniform CNTs on copper powders and effect of reaction temperature on the morphology of CNTs was surveyed. The results showed that CNTs products on the copper powder surface were distributed uniformly even if reaction temperature was different. The diameter dimension of CNTs was within the scope of 3060 nm. Growth behaviors of CNTs by CVD method were considered to be "tip-growth" mechanism. Raman spectra of CNTs proved that intensity ratio of D-band to G-band (I D / I G) increased as deposition reaction temperature increased, which implied that order degree of graphitic structure in synthesized CNTs improved.