30^th World Nano Conference

In this study, solution precipitation processes were used in order to synthesize calcium phosphate powder crystallites with nano-macro and meso-scale order. Calcium phosphate [CaP] powders were precipitated by using free-like ions of Ca2+ and H3-xPO4 from aqueous solution of calcium hydroxide [Ca(OH)2] and phosphoric acid [H3PO4]. According to phase boundary in the CaO-P2O5 phase diagram the concentration of Ca2+ and H3-xPO4 was controlled to make from nano- to macro- scale uniform crystallites. This research goal has been to attain the gyroid geometry in CaP bone blocks. The gyroid gyometry was found in butterfly-inspired nanostructure of long-tailed hairstreak butterfly, which can sort light. The green hairstreak butterfly (Callophrys rubi) gets its blue-green hue from complex nanoscale structures on its wings. The structures, called gyroids, are repeating patterns of spiral-shaped curls. Light waves bouncing off the patterned surface interfere with one another, amplifying green colors while washing out other shades. We have prepared copolymer template having gyroid chain structure. A polystyrene-b-polyisoprene-b-polystyrene [SIS] copolymer was synthesized via anionic polymerization. In order to give the gyroid chain structure in CaP bone blocks, triblock copolymers with gyroid chains was prepared through copolymerization (PS-PI/PS) of styrene monomer and isoprene monomer, and used for obtaining gyroid template of CaP nano-crystallites. Isoprene copolymer [PI] in PS-PI/PS gyroid copolymer composites was dissolved in solution and then CaP was infiltrated to get biomimetic gyroid chains in bone. Bone is a metalbolic gyometry of CaP crystallites and pores, in which bone cell may like to live.