The effects of Mg doping on the magnetic and AC self-heating temperature rising characteristics of γ-Fe2O3 superparamagnetic nanoparticles (SPNPs) were investigated for hyperthermia applications in biomedicine. The doping concentration of nonmagnetic Mg2+ cation was systematically controlled from 0 to 0.15 at. % in Mgx-γFe2O3 SPNPs during chemically and thermally modified one-pot thermal decomposition synthesis under bubbling O2/Ar gas mixture. It was empirically observed that the saturation magnetization (Ms) and the out-of-phase magnetic susceptibility ( χm″) of Mgx-γFe2O3 SPNPs were increased by increasing the Mg2+ cation doping concentration from 0.05 to 0.13 at. %. Correspondingly, the AC magnetically induced self-heating temperature (Tac,max) in solid state and the intrinsic loss power in water were increased up to 184 °C and 14.2 nH m2 kg−1 (Mgx-γFe2O3, x = 0.13), respectively, at the biologically and physiologically safe range of AC magnetic field (Happl × fappl = 1.2 × 109 A m−1 s−1). All the che...

中文翻译：

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Mg浅掺杂对γ-Fe2O3超顺磁性纳米粒子交流磁自热特性的影响，用于高效热疗

研究了 Mg 掺杂对 γ-Fe2O3 超顺磁性纳米粒子 (SPNPs) 磁性和交流自热升温特性的影响，用于生物医学中的热疗应用。非磁性 Mg2+ 阳离子的掺杂浓度系统地控制在 0 到 0.15 at。% 在 Mgx-γFe2O3 SPNPs 中，在 O2/Ar 气体混合物鼓泡下进行化学和热改性一锅热分解合成。根据经验观察到，通过将 Mg2+ 阳离子掺杂浓度从 0.05 at 增加到 0.13 at，Mgx-γFe2O3 SPNPs 的饱和磁化强度 (Ms) 和异相磁化率 (χm") 增加。%。相应地，固态交流磁感应自热温度 (Tac,max) 和在水中的固有损耗功率增加到 184 °C 和 14。2 nH m2 kg−1 (Mgx-γFe2O3, x = 0.13)，分别在交流磁场的生物和生理安全范围内 (Happl × fappl = 1.2 × 109 A m−1 s−1)。所有的切...