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Sökning: (WFRF:(Kan D)) > (2005-2009)

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  • Kim, Do Kyung, et al. (författare)
  • Monodispersed Fe-Pt nanoparticles for biomedical applications
  • 2005
  • Ingår i: Journal of Applied Physics. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 97:10, s. 10Q918-
  • Tidskriftsartikel (refereegranskat)abstract
    • Monodispersed Fe-Pt nanoparticles are promising candidates for biomedical applications with an average particle diameter of 6.9 nm Fe48Pt52, 3.3 nm Fe52Pt48, and 4.2 nm Fe70Pt30. They are prepared by simultaneous chemical reduction of Pt(acac)(2) and thermal decomposition of Fe(CO)(5) in the presence of surfactant as an anti-oxidation reagent and amine as a stabilizer. The blocking temperatures, T-b, of 9 K for Fe70Pt30, 11 K for Fe52Pt48 and 14.4 K for Fe48Pt52 and the mean diameter of the spherical magnetic particles were estimated from the calculated volume to be 3.6, 3.1, and 3.8 nm. The cytotoxicity of unmodified Fe-Pt nanoparticles was performed in brain endothelial cells. Fe48Pt52 nanoparticles were not found to have any significant toxicity on bEnd3 cells during a 24 h period.
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  • Yang, Kan, et al. (författare)
  • Effects of Calcium Codoping on Charge Traps in LSO:Ce Crystals
  • 2009
  • Ingår i: IEEE Transactions on Nuclear Science. - 0018-9499 .- 1558-1578. ; 56:5, s. 2960-2965
  • Tidskriftsartikel (refereegranskat)abstract
    • Experimental studies of Lu2SiO5 : Ce (LSO:Ce) crystals codoped with various concentrations of Ca (0, 0.1, 0.2, 0.3, and 0.4 at% in the melt) are presented. The scintillation and optical properties including photoluminescence decay, emission, excitation, absorption, afterglow and thermoluminescence properties are investigated as a function of Ca concentration. Experimental data show Ca codoping significantly reduces the trapped charge population in the crystal matrix. Hence, the scintillation decay time of LSO:Ce is shortened and the afterglow is suppressed. Thermoluminescence studies show a strong correlation between the integrated thermoluminescence intensity and the Ca concentration.
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