title: Effect of functionalized carbon nanotubes on the synthesis of hydroxyapatite nanoparticles.
abstract: The purpose of this study was to investigate the effect of the functionalized carbon nanotubes (CNT) on the nucleation of the HA nanoparticles. In this work, solutions of calcium nitrate tetra hydrate and diamonium hydrogen phosphate in water were used as Ca, P precursors. The former solution was added to an aqueous suspension of MWNTs-COOH. Different CNT functionalization percentage ratios of 1%, 2%, 3%, 4% and 5% were examined. X-ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FT-IR) experiments confirmed that the resulting powders were composed of hydroxyapatite. The Scanning Electron Microscopy (SEM) images illustrated a short distance effect of CNTs on the formation of the HA nanoparticles. In addition, a more detailed observation performed by Transmission Electron Microscopy (TEM) depicted the flake-like morphology of the nanoparticles. Based on the results of this research, the crystallinity decreased due to the CNT addition to the synthesis media. The sample containing a CNT functionality percentage of 5% revealed a preferred crystalline orientation compared with the samples composed of less CNT functionality percentage of 1%, 2%, 3% and 4%.
authors.affiliation: Faculty of Biomaterial Science, Department of Biomedical Engineering, Islamic Azad University, Science and Research Branch, Ponak, Tehran, PO Box 14176766981, Iran.
authors.forename: Tahmineh
authors.initials: T
authors.lastname: Forati
authors.forename: Aliasghar
authors.initials: A
authors.lastname: Behnamghader
authors.forename: Alimorad
authors.initials: A
authors.lastname: Rashidi
authors.forename: Afsaneh
authors.initials: A
authors.lastname: Gozalian
authors.forename: Dionysia
authors.initials: D
authors.lastname: Ntentopolou
authors.forename: Mahnaz
authors.initials: M
authors.lastname: Namvarasl
authors.forename: Leila
authors.initials: L
authors.lastname: Moradi
mesh_terms: D003460:Crystallization; D017886:Durapatite / Q000737:chemistry*; D008854:Microscopy, Electron; D053758:Nanoparticles / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry; D014961:X-Ray Diffraction
chemical_list: D037742:Nanotubes, Carbon; D017886:Durapatite