GdF3 hollow spheres: self-assembly and multiple emission spanning the UV to NIR regions under 980 nm excitation,Inorganic Chemistry Frontiers

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GdF3 hollow spheres: self-assembly and multiple emission spanning the UV to NIR regions under 980 nm excitation
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2020-02-19 , DOI: 10.1039/d0qi00084a
Xiaoyun Yuan _{1,

2,

3,

4,

5} , Lantian Zhang _{1,

2,

3,

4,

5} , Baojun Chen _{1,

2,

3,

4,

5} , Jinjiao Zhu _{1,

2,

3,

4,

5} , Xuechun Pan _{1,

2,

3,

4,

5} , Zhenlan Fang _{1,

2,

3,

4,

5} , Qiang Ju _{1,

2,

3,

4,

5} , Wei Huang _{1,

2,

3,

4,

5}

Affiliation

Materials with a hollow structure have drawn a lot of attentions due to their potential applications in controlled drug delivery and catalysis. When these hollow materials are integrated with upconversion nanocrystals, it is possible to modulate the release of loaded drugs with ultraviolet emission and to further trace the particles by near-infrared emission. However, reports of upconversion particles with intrinsic pores are scarce. In this work, monodispersed submicrometer GdF₃:Er,Yb hollow spheres have been synthesized via an effective one-pot hydrothermal route. These hollow spheres show an average diameter of ∼260 nm, and a shell thickness of about 90 nm. The surface of the hollow spheres is composed of small nanoparticles with a size of 16 nm. By modulating the amount of chelator, a formation mechanism for the hollow spheres has been proposed. Under excitation at 980 nm, these hollow spheres exhibit unique strong upconversion emissions spanning from the UV to the NIR, indicating that these hollow spheres hold promise for encapsulating drugs with controlled release and bioimaging in the NIR tissue transparent window.

中文翻译：

GdF3空心球：在980 nm激发下跨越UV到NIR区域的自组装和多次发射

具有中空结构的材料由于其在受控药物递送和催化中的潜在应用而引起了很多关注。当这些中空材料与上转换纳米晶体整合在一起时，可以通过紫外线发射来调节负载药物的释放，并通过近红外发射来进一步追踪颗粒。然而，关于具有固有孔的上转换颗粒的报道很少。在这项工作中，单分散的亚微米GdF ₃：Er，Yb空心球已经通过有效的一锅热液路线。这些空心球的平均直径约为260 nm，壳厚度约为90 nm。空心球的表面由大小为16 nm的小纳米颗粒组成。通过调节螯合剂的量，已经提出了空心球的形成机理。在980 nm激发下，这些空心球展现出从UV到NIR的独特强上转换发射，表明这些空心球有望将控释和生物成像的药物封装在NIR组织透明窗口中。

更新日期：2020-02-19

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