Maryam E. Haghiri*, Nayereh Soltani, Elias Saion, Azra Izanloo, Ghazaleh Bahmanrokh and Mina Askari Pages 198 - 209 ( 12 )
Background: Development of novel materials represents a new and fast evolving application of research in physics and medicine. The area of nanomaterial research has presented interesting physical and chemical properties that cannot be obtained from their macroscopic counterparts.
Objective: This study has attempted to attain well-dispersed nanoparticles by variation of polymer concentration.
Methods: In order to obtain the calcium borate nanoparticles, polyvinyl pyrrolidone has been used as a capping agent and the preparation method was performed via simple co-precipitation technique followed by heating treatment. In absence of polymer, the heating process causes un-controlled growth of particles with more flocculation and the nanoplate-shaped particles with mean size of 16.0 ×30.0 nm was formed. The introduction of polymer concentration of 1 wt% was conducted to the formation of spherical shaped nanoparticles with sufficiently narrow size distribution and small average size of 5.5 nm and 13.0 nm for the initial precipitation and heating process, respectively. Moreover, the synthesized calcium borate nanoparticles showed good luminescence properties with a simple glow curve dominating at 150°C.
Results: This curve was utilized to derive trapping parameters including the activation energy, order of kinetic and frequency factor.
Conclusion: The well-dispersed calcium borate nanoparticles have been prepared successfully by introduction of sufficient concentration of polymer.
Calcium borate, nanoparticles, luminescence, polyvinyl pyrrolidone, polymer, co-precipitation.
Razavi Cancer Research Center, Razavi Hospital, Imamreza International University, Mashhad, Shahid Rajaee branch, Farhangian University, Isfahan, 81786-83441, Department of Physics, Faculty of Science, University Putra Malaysia, 43400UPM Serdang, Selangor, Razavi Cancer Research Center, Razavi Hospital, Imamreza International University, Mashhad, Department of Physics, Faculty of Science, University Putra Malaysia, 43400UPM Serdang, Selangor, Department of Physics, Faculty of Science, University Putra Malaysia, 43400UPM Serdang, Selangor