了解LiLuF4:Tm3+,Yb3的温度计行为
Mirijam Lederer1, Maximilian Stremel2, Ian Pompermayer Machado1
1NanoSensing Group, Department of Chemistry, Ghent University Krijgslaan 289-S3 9000 Ghent Belgium anna.kaczmarek@ugent.be.
概括
(Tm3+), (Yb3+) 上转换系统可以作为一个宽范围的博尔兹曼温度计,但性能取决于样品晶度和宿主材料的声子能量. 具有低声子能量的无联体微晶样品是最优的.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 频谱学是一种光谱学.
背景情况:
- Er3+,Yb3+系统是一个成熟的发光温度计.
- Tm3+和Yb3+系统为近红外温度测量提供了潜力,但人们对其理解较少.
- 了解Tm3+,Yb3+温度计对于医学,纳米电子和工业的应用至关重要.
研究的目的:
- 为了研究发光波兹曼温度计的Tm3+,Yb3+上转换系统.
- 阐明样本形态 (微晶与纳米晶) 和表面连接体对温度计性能的影响.
- 为优化基于Tm3+,Yb3+的温度计制定准则.
主要方法:
- 在Tm3+,Yb3+中利用了温度依赖的多声波放松,Yb3+被添加了LiLuF4.
- 分析了微型和纳米晶体样本.
- 采用实验研究与动力模型相结合.
主要成果:
- Tm3+,Yb3+可以在低主机切断声能量 (∼500 cm-1) 的无合体,微晶样本中充当广泛的博尔兹曼温度计.
- 具有高振动能量的纳米晶体样本和表面连接物对温度计性能产生负面影响.
- Tm3+,Yb3+系统的性能对主体材料和样本结构高度敏感.
结论:
- 优化Tm3+,Yb3+发光温度计需要仔细选择具有低声子能量的无联体微晶宿主.
- Tm3+, Yb3+系统显示出承诺,但需要特定的条件来超越像Er3+, Yb3+这样的既定系统.
- 本研究为开发和应用基于Tm3+,Yb3+的上转换温度计提供了明确的指导方针.
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