Synthesis of dye-loaded NaYF4:Yb, Er superparticles for tunable upconversion emissions

Synthesis of dye-loaded NaYF4:Yb, Er superparticles for tunable upconversion emissions
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用于可调上转换发射的负载染料的 NaYF4:Yb、Er 超粒子的合成

DOI:
10.1049/mnl.2014.0471
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发表时间:
2015-03
影响因子:
1.3
通讯作者:
Li, Zhengquan
Li, Zhengquan
中科院分区:
材料科学4区
文献类型:
--
作者:
Bao, Longyi;Qiao, Ru;Zhang, Yong;Li, Zhengquan

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用乳液法制备了由NaYF4:Yb,Er纳米晶组成的球形超微粒。在每个超粒子中,许多单独的上转换纳米晶体凝聚在一起,并且由于初级纳米晶体的堆积而同时产生许多小空位。通过在组装过程中将荧光染料加载到这些超粒子的空位内,可以微调这些超粒子的上转换荧光。通过在这些超粒子中负载适量的染料,也可以实现几乎单波段的红色上转换发射。
Spherical superparticles consisting of small NaYF4:Yb, Er nanocrystals are developed with an emulsion method. Within each superparticle, many individual upconversion nanocrystals are condensed together and lots of small vacancies are simultaneously produced because of the packing of primary nanocrystals. Through the loading fluorescent dyes inside the vacancies of these superparticles during assembly, one can fine-tune the upconversion fluorescence of these superparticles. Nearly single-band red upconversion emission can also be achieved by loading suitable amounts of dyes in these superparticles.
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