Compressed energy transfer distance for remarkable enhancement of the luminescence of Nd3+-sensitized upconversion nanoparticles
Compressed energy transfer distance for remarkable enhancement of the luminescence of Nd3+-sensitized upconversion nanoparticles
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压缩能量传输距离显着增强 Nd3 敏化上转换纳米颗粒的发光
DOI：
10.1039/c8tc00936h
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发表时间：
2018-06
影响因子：
6.4
通讯作者：
Qu Junle
中科院分区：
文献类型：
--
作者：
Wang Dan;Xue Bin;Song Jun;Qu Junle
本研究报道了Nd 3+敏化的上转换纳米颗粒（UCNPs）在类纳米结构中通过压缩能量传递距离而显著增强的上转换发光（UCL）。该结构由Nd敏化剂层（NaYF 4：Nd）和活化剂层（NaYF 4：Yb/Er）组成，其被惰性NaYF 4内核和惰性NaYF 4外壳包裹。通过引入惰性核和调节核尺寸，将Nd敏化层和激活层压缩在二维平面内，不仅缩短了Nd敏化层与激活层之间的距离，促进了能量从敏化层到激活层的传递，而且基于δ-掺杂，有效地增加了Yb 3+到Ho 3+的能量传递。此外，外部惰性壳层保护内层免受表面相关淬火。与经典的核-壳纳米结构相比，我们的压缩纳米结构在808 nm激发下表现出显着的上转换发光增强（高达19.6倍）。此外，这种策略也适用于其他激活剂（Er 3+，Tm 3+），也显示出明显的UCL增强。我们开发的纳米结构改善了Nd 3+敏化的UCNPs的UCL，这为需要10800 nm激发的各种应用提供了机会，例如光动力学治疗。
This study reports the significant enhancement of upconversion luminescence (UCL) of Nd3+-sensitized upconversion nanoparticles (UCNPs) in a sandwich-like nanostructure by compressing the energy transfer distance. The architecture consists of a Nd sensitizer layer (NaYF4:Nd) and an activator layer (NaYF4:Yb/Er) that were enveloped with an inert NaYF4 inner core and inert NaYF4 outer shell. By introducing the inert core and modulating the core size, the Nd sensitizer layer and the activator layer were compressed in a 2D plane, which not only promotes the energy transfer from the Nd sensitizer layer to the activators by shortening their distance, but also effectively increases the energy transfer from Yb3+ to Ho3+ based on δ-doping. Furthermore, the outside inert shell shielded the inside layers from surface-related quenching. Compared with the classical core–shell nanostructure, our compressed nanostructures exhibit remarkably large upconversion luminescence enhancement (up to 19.6-fold) upon 808 nm excitation. Furthermore, this strategy was also applied to other activators (Er3+, Tm3+), which also displayed distinct UCL enhancement. Our developed nanostructure improved the UCL of Nd3+-sensitized UCNPs, which provides opportunities for diverse applications requiring ∼800 nm excitation, such as photodynamic therapy.
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影响因子：
16.6
作者：
Wang, Feng;Wang, Juan;Liu, Xiaogang
通讯作者：
Liu, Xiaogang
DOI：
10.1364/josab.8.001391
发表时间：
1991-07-01
影响因子：
1.9
作者：
CAIRD, JA;RAMPONI, AJ;STAVER, PR
通讯作者：
STAVER, PR
影响因子：
--
作者：
Jing Zuo;Dapeng Sun;Langping Tu;Yanni Wu;Yinghui Cao;B. Xue;Youlin Zhang;Yulei Chang;Xiaomin Liu-Xi
通讯作者：
Jing Zuo;Dapeng Sun;Langping Tu;Yanni Wu;Yinghui Cao;B. Xue;Youlin Zhang;Yulei Chang;Xiaomin Liu-Xi
影响因子：
29.4
作者：
Y. Zhong;Gan Tian;Zhanjun Gu;Yijun Yang;Lin Gu;Yuliang Zhao;Ying Ma;J. Yao
通讯作者：
Y. Zhong;Gan Tian;Zhanjun Gu;Yijun Yang;Lin Gu;Yuliang Zhao;Ying Ma;J. Yao
使用 915 nm 激光激发 Tm3 /Er3 /Ho3 掺杂 NaYbF4 上转换纳米颗粒进行体外和更深体内生物成像，无需过热照射
影响因子：
17.1
作者：
Zhan, Qiuqiang;Qian, Jun;Andersson-Engels, Stefan
通讯作者：
Andersson-Engels, Stefan