XPS and IR study of dicalcium phosphate dihydrate nucleation on titanium surfaces

The nucleation and growth of dicalcium phosphate dihydrate (DCPD, CaHPO4.2H20) on titanium powder at 37°C and pH 5.5 has been investigated using the constant composition crystal growth method. The interaction between calcium phosphate nuclei and the oxidized titanium layer was characterized by XPS and IR analyses. At the earliest stage of contact with the supersaturated solution, the oxidized titanium surface exhibited an increase of the...