Up-Conversion Luminescence of NaYF4:Yb3+/Er3+ Nanoparticles Embedded into PVP Nanotubes with Controllable Diameters

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• 作者：Peng Zou ; Xia Hong ; Yadan Ding ; Zhenyi Zhang ; Xueying Chu ; Talgar Shaymurat ; Changlu Shao ; Yichun Liu
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：March 8, 2012
• 年：2012
• 卷：116
• 期：9
• 页码：5787-5791
• 全文大小：337K
• 年卷期：v.116,no.9(March 8, 2012)
• ISSN：1932-7455

文摘

NaYF₄:Yb³⁺/Er³⁺/polyvinylpyrrolidone (PVP) up-conversion (UC) luminescent nanotubes were synthesized by the electrospinning technique. The diameters of the nanotubes were controllable by changing the electrospinning voltages. The structure and the optical properties were studied by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), photoluminescence (PL) spectra, and fluorescence microscope. The NaYF₄:Yb³⁺/Er³⁺/PVP nanocomposites simultaneously possessed UC luminescent property, active surfaces and tubular structure. PVP molecules were found to have an important influence on the UC luminescence of NaYF₄:Yb³⁺/Er³⁺/PVP nanotubes. Compared with those in pure NaYF₄:Yb³⁺/Er³⁺ nanoparticles, the relative intensities of violet, blue, and green to red emissions were increased in NaYF₄:Yb³⁺/Er³⁺/PVP nanotubes. It is owing to the existence of PVP molecules, which might produce the passivation on NaYF₄:Yb³⁺/Er³⁺ nanoparticles and reduce the nonradiative relaxation of Er³⁺ ion. The luminescent nanotubes with desirable UC properties are expected to be applied in biomedicine.