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Redispersible and stable amorphous calcium phosphate nanoparticles functionalized by an organic bisphosphate

Rong-Hui Lai ,  Ping-Jiang Dong ,  Yong-Li Wang ,  Jian-Bin Luo

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Citation:  Rong-Hui Lai, Ping-Jiang Dong, Yong-Li Wang, Jian-Bin Luo. Redispersible and stable amorphous calcium phosphate nanoparticles functionalized by an organic bisphosphate[J]. Chinese Chemical Letters, 2014, 25(2): 295-298. shu

Redispersible and stable amorphous calcium phosphate nanoparticles functionalized by an organic bisphosphate

    • 通讯作者: Jian-Bin Luo,
  • 基金项目:

    We acknowledge the financial supports from the Natural Science Foundation of China (No. 50973069) (No. 50973069)

    the project of Postgraduate Degree Construction, Southwest University for Nationalities (No. 2013XWD-S0703). (No. 2013XWD-S0703)

摘要: Althoughmuch effort has been focused on the preparation of stable amorphous calciumphosphate (ACP) nanoparticles in aqueous solution, the redispersibility and long-term stability of ACP nanoparticles in aqueous solution remains an unresolved problem. In this work, stable colloidal ACPs were prepared by using an organic bisphosphonate (BP) as a sterically hindered agent in aqueous solution. The harvested calcium phosphate nanoparticles were characterized by inductively coupled plasma atomic emission spectrometry (ICP-AES), Fourier transform infrared (FTIR), X-ray diffraction (XRD), dynamic light scattering (DLS) and transmission electron microscopy (TEM). ICP-AES, FTIR and XRD results suggested the particles were ACP. DLS and TEM results indicated that the size of the ACP nanoparticles were in the range of 60 nm with a spherical morphology. The resulting calciumphosphate nanoparticles retained its amorphous nature in aqueous solution for at least 6 months at room temperature due to the stabilizing effect of the organic bisphosphonate. Moreover, the surface of the ACP nanoparticles adsorbed with the organic bisphosphate used showed good redispersibility and high colloid stability both in organic and aqueous solutions.

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  • 收稿日期:  2013-09-23
  • 网络出版日期:  2013-10-25
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