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首页> 外文期刊>Physical chemistry chemical physics: PCCP >Pure and almost pure NIR emission of Tm and Tm,Yb-CeO2 under UV, X-ray and NIR up-conversion excitation: key roles of level selective antenna sensitization and charge-compensation
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Pure and almost pure NIR emission of Tm and Tm,Yb-CeO2 under UV, X-ray and NIR up-conversion excitation: key roles of level selective antenna sensitization and charge-compensation

机译：Tm和Tm，Yb-CeO2在UV，X射线和NIR上转换激发下的纯近乎纯净的NIR发射：电平选择天线敏化和电荷补偿的关键作用

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摘要

Herein, we report on the pure and almost pure near-infrared (NIR) emission at around 807 nm observed for Tm(Yb) (co)-doped CeO2 nanoparticles (NPs) under UV, X-ray and NIR up-conversion excitation. The optical responses are attributed to the low-lying charge-transfer of CeO2 that acts as a selective antenna sensitizer of the Tm H-3(4) emission and Yb doping that lowers the local symmetry at Tm sites and introduces additional phonon modes. Selective antenna sensitization is also observed for Er/Ho (Yb) (co)-doped CeO2 NPs. To the best of our knowledge, this is a first study which correlates the down-and up-conversion emission properties of lanthanide(s)-(co) dopants with the CeO2 structure highlighting also the outstanding potential of these NPs in high-penetration tissue imaging and therapy.
机译：本文中，我们报道了在UV，X射线和NIR上转换激发下，Tm（Yb）（co）掺杂的CeO2纳米粒子（NPs）在807 nm附近观察到的纯净和近乎纯净的近红外（NIR）发射。光学响应归因于CeO2的低电荷转移，它作为Tm H-3（4）发射的选择性天线敏化剂和Yb掺杂降低了Tm位置的局部对称性并引入了其他声子模式。还观察到掺Er / Ho（Yb）（co）的CeO2 NP的选择性天线敏化。据我们所知，这是第一项研究，将镧系元素-（共）掺杂剂的上下转换发射特性与CeO2结构相关联，突显了这些NP在高渗透组织中的巨大潜力成像和治疗。

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