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Controlled Synthesis, Evolution Mechanisms, and Luminescent Properties of ScFx:Ln (x = 2.76, 3) Nanocrystals
Chemistry of Materials ( IF 7.2 ) Pub Date : 2017-11-15 00:00:00 , DOI: 10.1021/acs.chemmater.7b03561
Juan Xie 1 , Xiaoji Xie 2 , Chao Mi 3 , Ziyu Gao 2 , Yue Pan 2, 4 , Quli Fan 1 , Haiquan Su 4 , Dayong Jin 3 , Ling Huang 2 , Wei Huang 1, 2
Affiliation  

Kinetic or thermodynamic control has been employed to guide the selective synthesis of conventional organic compounds, and it should be a powerful tool as well for accessing unusual inorganic nanocrystals, particularly when a series of members with similar chemical compositions and phase structures exist. Indeed, a comprehensive mapping of the energy barrier distribution of each nanocrystal in a predefined reaction system will enable not only the precise synthesis of nanocrystals with expected sizes, morphologies, phase structures, and ultimately functionalities, but also disclosure of the evolution details of nanocrystals from one structure to another. Using ScFx:Ln (x = 2.76, 3) series as a proof-of-concept, we have successfully mapped out the energy barriers that correspond to each of the ScFx:Ln nanocrystals, unraveled suitable temperatures for each type of nanocrystal formation, recorded their phase transition procedures, and also discovered the relationships of the products at each reaction stage. To testify how this approach allows one to tailor the structure-related optical properties, different lanthanide-doped ScFx nanocrystals were synthesized and a wide-range of luminescence fine-tuning was achieved, which not only showcases high quality of the nanocrystals, but also provides more candidates for various luminescence applications, especially when single-particle upconversion emission is required.

中文翻译:

ScF x:Ln(x = 2.76,3)纳米晶体的受控合成,演化机理和发光性质

动力学或热力学控制已被用来指导常规有机化合物的选择性合成,并且它还应该是获得非常规无机纳米晶体的有力工具,特别是当存在具有相似化学组成和相结构的一系列成员时。实际上,在预定义的反应系统中对每个纳米晶体的能垒分布进行全面映射,不仅可以精确合成具有预期尺寸,形态,相结构和最终功能的纳米晶体,而且还可以揭示纳米晶体的演化细节。一个结构到另一个。使用ScF x:Ln(x= 2.76,3)系列作为概念验证,我们已经成功绘制出了与每个ScF x:Ln纳米晶体相对应的能垒,并为每种类型的纳米晶体形成了合适的温度,并记录了它们的相变过程,并且还发现了每个反应阶段产物的关系。为了证明这种方法如何允许定制与结构相关的光学特性,合成了掺杂镧系元素的ScF x纳米晶体,并实现了宽范围的发光微调,这不仅展示了纳米晶体的高质量,而且还展示了纳米晶体的高品质。为各种发光应用提供了更多的候选对象,尤其是在需要单粒子上转换发射时。
更新日期:2017-11-16
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