生物相容性发光Ce3+敏化SrF2:Tb3+用于防伪和法医指纹检测

IF 3.5 Q2 CHEMISTRY, ANALYTICAL
Dhanapriya Devi Yengkhom, Henasurkishore Oinam, Silvia Thongbram, Rajkumar Sunil Singh, Naorem Shanta Singh and Ningombam Yaiphaba
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引用次数: 0

摘要

采用水热法制备了Ce3+敏化Tb3+活化SrF2纳米荧光粉(NPs)。利用x射线衍射的晶体学表征证实了所有样品都形成了具有空间群Fmm的立方SrF2。FESEM图像显示球形颗粒。表面功能化使得NPs在水中具有分散性。SrF2:5% Tb3+, 5% Ce3+在541 nm处的强绿色发光比SrF2:5% Tb3+提高了50倍。观察到Ce3+和Tb3+之间通过多极相互作用的共振能量转移。计算了能量传递效率和频谱重叠积分。SrF2:5% Tb3+, 5% Ce3+的绝对量子产率为~ 12%。NPs对HeLa细胞系具有良好的生物相容性,细胞存活率达70%。SrF2:5% Tb3+, 5% Ce3+纳米荧光粉的细胞间摄取是公平的,并且观察到其防伪和法医指纹应用的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Biocompatible luminescent Ce3+-sensitized SrF2:Tb3+ for anticounterfeiting and forensic fingerprint detection

Biocompatible luminescent Ce3+-sensitized SrF2:Tb3+ for anticounterfeiting and forensic fingerprint detection

Ce3+-sensitized Tb3+-activated SrF2 nanophosphors (NPs) were synthesized using the hydrothermal method. Crystallographic characterization using X-ray diffraction confirms the formation of cubic SrF2 with space group Fmm for all samples. The FESEM image indicates spherical-shaped particles. Surface functionalization renders that the NPs are dispersible in water. The strong green emission of SrF2:5% Tb3+, 5% Ce3+ at 541 nm increases by 50-fold than that of SrF2:5% Tb3+. The resonance energy transfer between Ce3+ and Tb3+via multipolar interactions is observed. The energy transfer efficiency and spectral overlap integral are calculated. The absolute quantum yield of SrF2:5% Tb3+, 5% Ce3+ is observed to be ∼12%. The NPs show excellent biocompatibility towards the HeLa cell line with 70% cell viability. Intercellular uptake of the SrF2:5% Tb3+, 5% Ce3+ nanophosphor is fair, and its potential for anti-counterfeiting and forensic fingerprint applications is observed.

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