Research on the Catalyst Used for Vertical Aligned Carbon Nanotube Arrays Prepared by Catalytic Chemical Vapor Deposition

Abstract

Process control of the oriented growth of vertical aligned carbon nanotube arrays and preparation of various ordered structure of carbon nanotube films is the major challenge for practical application. In order to better understand the parameters governing the catalytic properties of the catalytic nanoparticles, this paper summarizes the advances in the catalyst used for vertical aligned carbon nanotube arrays prepared by catalytic chemical vapor deposition, and the process parameters were considered to be able to control the particles size, composition, structure of catalyst. And investigations into the effects of during time, temperature, atmosphere in pre-treatment process, and the transition layer on catalyst morphology evaluation were further found that the catalyst particles size, distribution and density can be transformed through the surface diffusion and inter-layer diffusion influenced by those process.