Journal
CHEMISTRY OF MATERIALS
Volume 29, Issue 22, Pages 9758-9766Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.7b03561
Keywords
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Funding
- National Natural Science Foundation of China [21401103, 21371095]
- National Basic Research Program of China (973 Program) [2015CB932200]
- Natural Science Foundation of Jiangsu Province [BM2012010, BE2015699, BL2014075]
- Qing Lan Project
- Synergetic Innovation Center for Organic Electronics and Information Displays
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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.
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