“…Simulated body fluid (SBF), a solution with similar inorganic ion concentrations to those of human plasma, and 1.5SBF, a solution with ion concentrations that are 1.5-fold higher than those of SBF, have been used in the biomimetic deposition of HAp on various material surfaces under mild conditions [5][6][7]. Acidic functional groups such as carboxylate groups displayed on substrate surfaces are known to effectively induce the heterogeneous nucleation of HAp in SBFs [8].…”