Effect of Hydroxyapatite Matrix on the Growth of Carbon Nanotubes via a CVD System

Abstract:

This paper reports the fabrication of carbon nanotubes (CNTs) /hydroxyapatite (HA) composites via in-situ process in a chemical vapor deposition (CVD) system and the effect of HA matrix on the growth of CNTs. When the HA matrix is fabricated by a chemical coprecipitation method, deficient HA (D-HA) crystals in nano size have been observed in these composites. There are about 20% weight percent of multi-walled CNTs with a mean diameter of 40~60 nm. When the matrix used as catalyst for CNTs growth without HA in the same way, no CNTs but solid carbon fibers in submicrometer scale have been produced in these composites. Only Fe and MgO crystals can be observed in these composites. When the HA matrix is fabricated by a physical mixing with the presence of D-HA crystals, hollow CNTs with the diameter of 180~210 nm are also produced in these composites. Fe and MgO besides P₂O₅, D-HA and C crystals can be observed in the composites.

• Periodical: Materials Science Forum (Volume 685)
• Pages: 335-339
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.685.335
• Online since: June 2011
• Authors: Xiao Ying Lu, Bao Hua Wu, Yu Jie Liu, Tian Qiu, Jie Weng
• Keywords: Carbon Nanotube (CN), Chemical Vapor Deposition (CVD), Composite, Hydroxyapatite (HAP)

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