Color-tunable up-conversion emission of luminescent-plasmonic, core/shell nanomaterials - KY3F10:Yb3+,Tm3+ /SiO2-NH2/Au
Color-tunable up-conversion emission of luminescent-plasmonic, core/shell nanomaterials - KY3F10:Yb3+,Tm3+ /SiO2-NH2/Au
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DOI：
10.1016/j.jlumin.2017.02.032
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发表时间：
2017-06-01
影响因子：
3.6
通讯作者：
Runowski, Marcin
中科院分区：
文献类型：
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作者：
Runowski, Marcin
成功制备了KY 3F 10：Yb 3+，Tm 3 + /SiO2-NH 2/Au多功能发光等离子体纳米材料。在水热条件下合成的镧系元素掺杂的氟化物纳米颗粒（NPs）表现出明亮的蓝色上转换发光（λ（ex）= 980 nm）。这种镧系元素纳米晶体（20-40 nm）用胺改性的二氧化硅壳包覆，形成核/壳纳米结构。它们的表面进一步均匀地覆盖有超小的金纳米颗粒（4-7 nm）。由于等离子体和发光相之间的相互作用，所制备的发光-等离子体核/壳纳米材料表现出可调谐的上转换发射。Tm 3+离子的发射受到表面Au NPs的影响，其在可见光范围（450-650 nm）内表现出强的等离子体吸收。随着表面Au纳米粒子数量的增加，Tm 3+发射带的比例发生了显著变化。NIR带（H-3（4）-> H-3（6））未改变，而可见光范围内的带的比率和相对强度（（1）G（4）-> H-3（6）和（1）G（4）-> F-3（4））改变。这导致了发射光谱形状的显著变化，并影响了发射的颜色，调谐，它从明亮的蓝色到蓝紫色。采用透射电子显微镜（TEM）、能量色散X射线分析（EDX）、粉末X射线衍射（XRD）、紫外-可见吸收光谱和荧光光谱（激发/发射光谱和荧光衰减曲线）对产物进行了表征。(C)2017 Elsevier B. V.版权所有。
Multifunctional luminescent-plasmonic KY3F10:Yb3+,Tm3+ /SiO2-NH2/Au nanomaterials were successfully obtained. The lanthanide-doped fluoride nanoparticles (NPs), synthesized under hydrothermal conditions exhibited bright blue up-conversion luminescence (lambda(ex)= 980 nm). Such lanthanide nano crystals (20-40 nm) were coated with amine modified silica shell, forming core/shell nanostructures. Their surface was further uniformly covered with ultra-small gold NPs (4-7 nm). The as -prepared luminescent-plasmonic core/shell nanomaterials exhibited tunable up -conversion emission, due to the interactions between plasmonic and luminescent phases. The emission of Tm3+ ion was affected by the surface Au NPs, which exhibited strong plasmonic absorption in the visible range (450-650 nm). The increasing amount of the surface Au NPs, led to the significant alterations in a ratio of the Tm3+ emission bands. The NIR band (H-3(4) -> H-3(6)) was unchanged, whereas the ratio and relative intensity of the bands in a visible range ((1)G(4) -> H-3(6) and (1)G(4) -> F-3(4)) was altered. This led to the significant change of the emission spectra shape and influenced color of emission, tuning, it from bright blue to blue-violet. The products obtained were characterized by transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX), powder X-ray diffraction (XRD), UV-vis absorption spectroscopy and luminescence spectroscopy (excitation/emission spectra and luminescence decay curves). (C) 2017 Elsevier B.V. All rights reserved.