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Self‐Assembly of Dandelion‐Like Hydroxyapatite Nanostructures Via Hydrothermal Method
Author(s) -
Lak Aidin,
Mazloumi Mahyar,
Mohajerani Matin,
Kajbafvala Amir,
Zanganeh Saeid,
Arami Hamed,
Sadrnezhaad S. K.
Publication year - 2008
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02600.x
Subject(s) - dandelion , nanostructure , nanorod , transmission electron microscopy , scanning electron microscope , materials science , ethylenediaminetetraacetic acid , hydrothermal circulation , chemical engineering , nanoparticle , thermal stability , nanotechnology , fourier transform infrared spectroscopy , hydrothermal synthesis , composite material , metallurgy , medicine , alternative medicine , pathology , traditional chinese medicine , chelation , engineering
Self‐assembled dandelion‐like hydroxyapatite (HAp) nanostructures were successfully synthesized via a mild template‐free hydrothermal process, using ethylenediaminetetraacetic acid (EDTA) as the surfactant. The obtained dandelion‐like HAp nanostructures were between 5 and 8 μm in diameter and were composed of radially oriented nanorods with an average diameter of about 200 nm. The X‐ray diffraction analysis and Fourier transform infrared spectroscopy were used to characterize the crystalline phase and purity of the synthesized nanostructures. The Brunauer–Emmett–Teller surface area of the dandelion‐like nanostructures was measured to be about 39 m 2 /g. The results of thermal analysis revealed that dandelion‐like HAp nanostructures have appropriate thermal stability up to 1200°C. Scanning electron microscopy and transmission electron microscopy analyses showed that EDTA plays an important role in obtaining the dandelion‐like morphology, because without it, only monodispersed HAp nanoparticles with an average diameter of about 125 nm were formed. The mechanism for the formation of dandelion‐like HAp nanostructures was suggested based on the radial self‐assembly of Ca‐EDTA molecular complexes.