4.5 Article

Block-copolymer-assisted synthesis of hydroxyapatite nanoparticles with high surface area and uniform size

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TAYLOR & FRANCIS LTD
DOI: 10.1088/1468-6996/12/4/045005

关键词

triblock copolymer F127; hydroxyapatite; nanoparticles; formation; coprecipitation method; calcium D-gluconate; potassium hydrogen phosphate

资金

  1. National Science Council of Taiwan [NSC 97-2221-E-033-016, 98-2221-E-033-005]

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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 < 001 > 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 (127m(2) g(-1)) than the solvent-extracted HANPs (44m(2) g(-1)).

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