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稀土掺杂的上转换纳米粒子具有优越的物化性能,如光稳定性、连续发射能力以及锐利的多峰线发射,使其在生物医学领域具有广泛的应用前景.但是,传统上转换纳米粒子由于易发生表面猝灭效应,会大大降低量子产率,从而阻碍了其在生物医学领域的进一步发展.通过核壳结构的设计,不仅可以弥补传统上转换纳米粒子的固有缺陷,并且带来一系列革新的性能和广泛的应用.本文介绍了近几年研究较多的4种核-壳型上转换纳米粒子,分析总结它们的结构特点和研究现状,同时还调研了核壳结构在生物医学领域的最新研究进展,期望能够加深人们对这一领域的理解,为今后新型核壳结构的设计提供指导.
Rare-earth doped upconverting nanoparticles have excellent physicochemical properties, such as light stability, continuous emission ability and sharp multimodal emission, which make them widely used in the biomedical field.However, the conventional conversion of nanoparticles due to Easy to produce surface quenching, will greatly reduce the quantum yield, which hindered its further development in the field of biomedical.Core-shell structure design can not only make up for the inherent defects of the traditional conversion of nanoparticles, and bring a series of Innovative properties and a wide range of applications.In this paper, four kinds of core-shell upconverted nanoparticles with more research in recent years are introduced, their structural features and research status are analyzed and summarized, and the core-shell structure is also investigated in the field of biomedicine The latest research progress is expected to deepen people’s understanding of this area and provide guidance for the design of a new type of core-shell structure in the future.