Hydroxyapatite (HAp) is a biocompatibility material. We have successfully obtained the nano-particles of hydroxyapatite by the underwater laser ablation. A sintered HAp ceramics target was made of commercially available HAp powder and it was placed in the purified water. The focused KrF excimer laser outputs were irradiated on the target surface at the fluence from 7 J/cm2 to 23 J/cm2 at the repetition rate of 100 Hz. We found that the amount of the particles increased in proportional to the laser fluence. However, the rate of content of sub-micron particles was became larger at the lower laser fluence. The particles made by 7J/cm2 laser ablation were dispersing in the water for 12 hours after stopping the laser irradiation.
Nano-particles of hydroxyapatite formed by underwater laser ablation method
Masahito Katto, Yasuhiro Kuroe, Masanori Kaku, Shoichi Kubodera, Atsushi Yokotani, Hiroaki Katayama, Takeyoshi Nakayama; October 14–18, 2018. "Nano-particles of hydroxyapatite formed by underwater laser ablation method." Proceedings of the International Congress on Applications of Lasers & Electro-Optics. ICALEO® 2008: 27th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Orlando, FL, USA. (pp. M203). ASME. https://doi.org/10.2351/1.5061361
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