通过Sm3+和Co2+离子兴奋剂控制BiFeO3纳米粒子中的物理性质
Kyrillos Papadopoulos1,2, Eirini Myrovali1,2, Astita Dubey3
1School of Physics, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
Nanotechnology
|September 25, 2023
概括
杂的比斯木铁纳米颗粒显示出对磁性高热治疗癌症的前景. 化纳米颗粒在射频下表现出优异的加热效率,达到治疗温度.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 生物医学工程 生物医学工程
背景情况:
- 双铁 (BiFeO3) 纳米粒子 (NP) 在磁性高温症 (MH) 方面得到了探索.
- 兴奋剂旨在增强MH应用的物理性质.
- 了解剂对晶体结构和热行为的影响至关重要.
研究的目的:
- 调查Sm3+和Co2+兴奋剂对BiFeO3纳米粒子特性的影响.
- 为了评估在射频 (RF) 范围内的杂BiFeO3NP的磁性高温性能.
- 评估这些杂纳米粒子适用于生物医学应用,特别是癌症治疗的适用性.
主要方法:
- 合成高度结晶的BiFeO3,Sm-doped BiFeO3 (Sm-BFO) 和Co-doped BiFeO3 (Co-BFO) 的纳米粒子.
- 分析热行为,包括结晶和库里过渡温度.
- 使用FT-IR和拉曼光谱法进行振动分析,以确认晶体相和结构变化.
- 在不同的射频频率 (375kHz和765kHz) 和磁场强度 (30mT) 上评估磁性超热性能.
主要成果:
- 兴奋剂影响了结晶温度,并降低了BiFeO3.3的库里过渡温度.
- FT-IR和拉曼光谱证实了R3c阶段,并表明Sm-BFO和Co-BFONP中的结构扭曲.
- 兴奋剂导致局部两极分化增加并增强可见光吸收.
- 同BFONP在30mT/765kHz时表现出最高的磁性超热性能,达到治疗温度.
- 所有样本的加热效率随频率的增加而增加.
结论:
- Sm3+ 和 Co2+ 兴奋剂改变了 BiFeO3 纳米粒子的物理性质.
- 联合剂的BiFeO3纳米颗粒显示出作为用于癌症治疗的磁性高热剂的显著潜力.
- 在高射频频率的增强性能使得这些杂NP适合生物医学应用.
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