Block-copolymer-assisted synthesis of hydroxyapatite nanoparticles with high surface area and uniform size
| Autor: | Yu-Tzu Huang, Masataka Imura, Yoshihiro Nemoto, Chao-Hung Cheng and Yusuke Yamauchi |
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| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Science and Technology of Advanced Materials, Vol 12, Iss 4, p 045005 (2011) |
| Druh dokumentu: | article |
| ISSN: | 1468-6996 1878-5514 |
| Popis: | We report the synthesis of hydroxyapatite nanoparticles (HANPs) by the coprecipitation method using calcium D-gluconate and potassium hydrogen phosphate as the sources of calcium and phosphate ions, respectively, and the triblock copolymer F127 as a stabilizer. The HANPs were characterized using scanning electron microscopy, x-ray diffraction, and nitrogen adsorption/desorption isotherms. Removal of F127 by solvent extraction or calcination alters the structure of HANPs. The solvent-extracted HANPs were single crystals with their lang001rang axis oriented along the rod axis of the HANP, whereas the calcined HANPs contained two crystal phases that resulted in a spherical morphology. The calcined HANPs had much higher surface area (127 m2 g−1) than the solvent-extracted HANPs (44 m2 g−1). |
| Databáze: | Directory of Open Access Journals |
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