Towards pure near-infrared to near-infrared upconversion of multifunctional GdF(3):Yb(3+),Tm(3+) nanoparticles.
Towards pure near-infrared to near-infrared upconversion of multifunctional GdF(3):Yb(3+),Tm(3+) nanoparticles.
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DOI：
10.1364/oe.18.006123
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发表时间：
2010-03
期刊：
影响因子：
3.8
通讯作者：
H. Wong;H. L. Chan;J. Hao
中科院分区：
文献类型：
--
作者：
H. Wong;H. L. Chan;J. Hao
首次报道了在980 nm激发下，含23% Yb（3+）和1% Tm（3+）的GdF(3)基质中近纯近红外到近红外（NIR-to-NIR）的上转换。807 nm处的发射强度与478 nm处的发射强度之比可达105，并保留了807 nm处的发射强度。此外，980和807 nm处的激发和发射远离可见光区。这些都有利于更深的组织穿透和减少自身荧光。拉曼光谱测量结果表明，GdF(3)宿主极有可能发射近红外辐射。结果表明，所制备的多功能纳米颗粒在生物成像和生物分离方面具有广阔的应用前景。
Nearly pure near-infrared to near-infrared (NIR-to-NIR) upconversion in GdF(3) host with 23% Yb(3+) and 1% Tm(3+) under 980 nm excitation is firstly reported. The ratio of the intensity of the emission at 807 nm to that at 478 nm can reach to 105, and the intensity of the emission at 807 nm is preserved. Moreover, the excitation and the emission at 980 and 807 nm are away from the visible region. These are beneficial to deeper tissue penetration and reduced autofluorescence. Raman spectroscopy measurements suggest the high probability of NIR emission in GdF(3) host. Our results indicate that the reported multifunctional nanoparticles are promising in bio-imaging and bio-separation.