Abstract
Herein, we report an X-ray-induced hydrothermal process for synthesizing hydroxyapatite (HA) nanostructures at 25 °C and atmospheric pressure. Synchrotron white X-rays were used as light sources. We found that X-rays can facilitate photoinduced hydrothermal processes when irradiated in aqueous solutions containing Ca2+ and HPO42− precursors. At pH 7, a mixture of thin HA nanoplates and nanorods was formed, and as pH increased to 10, nanorods were mainly formed. HA nanostructures have poor crystallinity with high-density grain boundaries and domain size of approximately 55 Å because the reaction occurred at 25 °C. The elemental ratio of Ca and P atoms was estimated to be 64:36, which is close to the bulk values of 62.5% and 37.5%, respectively. We successfully demonstrated the feasibility of coating a porous HA film comprising nanorods onto Ti disks and Au/sapphire substrates using an X-ray-induced hydrothermal process.
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This work was supported by research funds from Chosun University (2020).
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Ham, D., Cha, S.Y., Lee, S.Y. et al. X-ray-induced hydrothermal process of hydroxyapatite nanostructures. J. Korean Phys. Soc. 80, 484–489 (2022). https://doi.org/10.1007/s40042-022-00449-3
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DOI: https://doi.org/10.1007/s40042-022-00449-3