期刊
ACS NANO
卷 3, 期 11, 页码 3804-3808出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn9012093
关键词
microwave-assisted synthesis; upconversion, nanocrystals; colloids; La Mer mechanism
类别
资金
- Deutsche Forschungsgerneinschaft DFG [NA373/7-1]
- University of East Anglia (UEA)
Upconverting nanocrystals have a tremendous potential for applications in fields such as bioanalysis, medical therapy, or display technologies. However, a prerequisite for many applications is the availability of small, monodisperse, and highly luminescent nanocrystals. Here we show, that a microwave-assisted synthesis approach allows for the synthesis of such monodisperse and luminescent upconverting nanocrystals within 5 min in a closed reaction vessel, Even though the same reactants and solvents as with classical conductive heating reactions were used, microwave-assisted synthesis resulted in differently sized and shaped particles and provided superior reaction control. The nucleation and growth mechanism follows a La Met scheme and can be controlled extremely accurately. It is expected that the fundamental principles of this synthesis approach can be applied to many other types of nanocrystals as well.
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