Synthesis of Calcium-Phosphate-Based Nanoparticles as Biocompatible and Biofunctional Element Blocks
Calcium phosphate (CaP)-based nanoparticles containing functional substances such as DNA and Ag are biocompatible and biofunctional element blocks that are useful as agents for drug and gene delivery and as building blocks for higher-order biomaterials. Such CaP-based nanoparticles can be synthesized via precipitation from labile supersaturated CaP solutions supplemented with functional substances. In this chapter, conventional and laser-assisted precipitation processes for the synthesis of CaP-based nanoparticles are described with a focus on our recent studies. Both precipitation methods are simple (one-pot), rapid (nanoparticle formation occurs within a few tens of minutes), free of harmful additives, and capable of controlling the physicochemical and biological properties of the CaP-based nanoparticles. These characteristics represent advantages for future in vitro and in vivo applications of these precipitation processes and the resulting CaP-based nanoparticles.
KeywordsCalcium phosphate Precipitation Supersaturated solution Nanoparticle Laser
Our research was supported by JSPS KAKENHI grant numbers JP16H03831, JP26560250, and JP15F15030, Japan; the Magnetic Health Science Foundation, Japan; and the Amada Foundation, Japan. We would like to thank Dr. Quazi T. H. Shubhra, Ms. Hiroko Araki, Ms. Ikuko Sakamaki, Dr. Yoshiki Shimizu, Dr. Kenji Koga, Dr. Alexander Pyatenko, and Dr. Atsuo Ito from AIST, Dr. Hirofumi Miyaji and Dr. Naoto Koshizaki from Hokkaido University, and Dr. Hideo Tsurushima from the University of Tsukuba for their contributions to our research.
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