材料科学
油胺
发光
纳米颗粒
大气温度范围
热分解
铕
分析化学(期刊)
激发
单晶
光电子学
纳米技术
核磁共振
热力学
工程类
化学
有机化学
物理
电气工程
色谱法
作者
Yue Pan,Xiaoji Xie,Qianwen Huang,Chao Gao,Yangbo Wang,Lingxiao Wang,Bingxiao Yang,Haiquan Su,Ling Huang,Wei Huang
标识
DOI:10.1002/adma.201705256
摘要
Luminescent nanothermometers have shown competitive superiority for contactless and noninvasive temperature probing especially at the nanoscale. Herein, we report the inherently Eu2+ /Eu3+ codoped Sc2 O3 nanoparticles synthesized via a one-step and controllable thermolysis reaction where Eu3+ is in-situ reduced to Eu2+ by oleylamine. The stable luminescence emission of Eu3+ as internal standard and the sensitive response of Eu2+ emission to temperature as probe comprise a perfect ratiometric nanothermometer with wide-range temperature probing (77-267 K), high repeatability (>99.94%), and high relative sensitivity (3.06% K-1 at 267 K). The in situ reduction of Eu3+ to Eu2+ ensures both uniform distribution in the crystal lattice and simultaneous response upon light excitation of Eu2+ /Eu3+ . To widen this concept, Tb3+ is codoped as additional internal reference for tunable temperature probing range.
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