Mn Blended Hydroxyapatite Nanoceramic: Bioactivity, Dielectric and Luminescence Studies

Abstract: In this study, in-vitro bioactivity of manganese blended hydroxyapatite (Mn-HAp) pellets is carried out using simulated body fluid (SBF) solution. The incubated Mn-HAp samples are characterized by XRD, FTIR and SEM/EDAX. Dielectric and photoluminescence properties of Mn-HAp samples are studied as a function of incubation period in SBF. XRD profiles show that hexagonal apatite structure remains intact after partial replacement of calcium ions by manganese ions and even after incubation. The change in absorption due to phosphate group, depicted in FTIR spectra, for incubated samples confirms growth of apatite on Mn-HAp surface. SEM/ EDAX studies suggest that Mn-HAp surface promotes the growth of apatite without changing its structure due to apatite nucleation and growth on the surface of Mn-HAp. The value of dielectric constant of Mn-HAp increases after incubation. Increase in period of immersion in m-SBF leads to decrease in dielectric constant of manganese exchanged hydroxyapatite. The photoluminescence (PL) study reveals that the Mn-HAp can be used stable and efficient blue luminescent material.