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Chen, F., Zhu, Y.J., Zhang, K.H., Wu, J., Wang, K.W., Tang, Q.L. and Mo, X.M. (2011) Europium-doped amorphous calcium phosphate porous nanospheres: preparation and application as luminescent drug carriers. Nanoscale Research Letters, 6, 67. doi:10.1186/1556-276X-6-67

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• TITLE: Effect of incubation in simulated body fluid on dielectric and photoluminescence properties of nano-hydroxyapatite ceramic doped with strontium ions

  AUTHORS: Megha P. Mahabole, Manjushree M. Bahir, Namdev V. Kalyankar, Rajendra S. Khairnar

  KEYWORDS: Hydroxyapatite; Dielectric Properties;Luminescence; Impedance; Biomedical Applications

  JOURNAL NAME: Journal of Biomedical Science and Engineering, Vol.5 No.7, July 3, 2012

  ABSTRACT: This paper reports the dielectric and photoluminescence measurements of ossiointegrated strontium doped hydroxyapatite bioceramic. The study on invitro bioactivity of Sr-HAp is carried out by using modified simulated body fluid. Dielectric properties of these ossiointegrated samples are studied in the frequency range 10 Hz to 1 MHz at room temperature. Dielectric constant is found to be decreasing with increase in incubation period and frequency of applied ac field. Higher the period of incubation and applied ac frequency, higher is the dielectric loss. AC conductivity shows frequency independent behaviour for all samples in lower frequency region and then increases linearly with increase in frequency. Sample incubated for longer duration shows higher conductivity. The optical properties of incubated Sr-HAp samples are also investigated with photoluminescence (PL) technique. The PL study shows the blue emission at around 476 nm when excited at 409 nm. The PL in tensity increases with increase in incubation duration and Sr-substitution.