Nie Jianmin, Li Yang, Liu Shanshan, Chen Qiuqun, Xu Qi, Qiu Jianrong
State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Technology, South China University of Technology, Guangzhou, 510640, China.
Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou, 510640, China.
Sci Rep. 2017 Sep 29;7(1):12392. doi: 10.1038/s41598-017-12591-1.
Construction of an active composite as a biomarker with deeper tissue penetration and higher signal-to-noise ratio (SNR) is of great importance for the application in bioimaging. Here, we report a strategy for tuning the emission bandwidth and intensity via crystal field control in long persistent phosphors (LPPs). Ni-doped ZnSnGaO phosphors, with a tunable emission band peaking from 1270 to 1430 nm in the second near-infrared (NIR) window, have been successfully prepared. Such featured materials have the advantages of low absorption and scattering as well as more efficient tissue penetration. The emission spectra can be controlled by tailoring the local crystal field around the activator precisely via substitution of Zn and Sn for Ga. Moreover, with high resolution and weak light disturbance, these developed multi-band afterglow phosphors exhibit great application potential in advanced optical imaging.
构建一种具有更深组织穿透能力和更高信噪比（SNR）的活性复合材料作为生物标志物，对于生物成像应用具有重要意义。在此，我们报告了一种通过控制长余辉磷光体（LPP）中的晶体场来调节发射带宽和强度的策略。已成功制备出镍掺杂的ZnSnGaO磷光体，其可调发射带在第二个近红外（NIR）窗口中从1270至1430 nm处达到峰值。此类特色材料具有低吸收和散射以及更高效的组织穿透优势。通过用Zn和Sn替代Ga精确调整激活剂周围的局部晶体场，可以控制发射光谱。此外，这些开发的多波段余辉磷光体具有高分辨率和弱光干扰，在先进光学成像中展现出巨大的应用潜力。
