首页> 外文期刊>Scientific reports. >Investigation on the structure and upconversion fluorescence of Yb3+/Ho3+ co-doped fluorapatite crystals for potential biomedical applications
【24h】

Investigation on the structure and upconversion fluorescence of Yb3+/Ho3+ co-doped fluorapatite crystals for potential biomedical applications

机译:Yb 3 + / Ho 3 + 共掺杂氟磷灰石晶体的结构和上转换荧光的研究潜在的生物医学应用

获取原文
           

摘要

Rare-earth Yb3+ and Ho3+ co-doped fluorapatite (FA:Yb3+/Ho3+) crystals were prepared by hydrothermal synthesis, and their structure, upconversion properties, cell proliferation and imaging were investigated. The synthesized crystals, with a size of 16 by 286?nm, have a hexagonal crystal structure of classic FA and a Ca/Yb/Ho molar ratio of 100/16/2.1. Several reasonable Yb3+/Ho3+ -embedding lattice models along the fluorine channel of the FA crystal cell are proposed for the first time, such as models for (Ca7YbHo?)(PO4)6F2 and (Ca6YbHoNa2)(PO4)6F2. The activated FA:Yb3+/Ho3+ crystals were found to exhibit distinct upconversion fluorescence. The 543- and 654-nm signals in the emission spectra could be assigned, respectively, to the 5F4 (5S2) - 5I8 and 5F5 - 5I8 transitions of holmium via 980-nm near-infrared excitation and the energy transfer of ytterbium. After the surfaces were grafted with hydrophilic dextran, the crystals displayed clear fluorescent cell imaging. Thus, the prepared novel FA:Yb3+/Ho3+ upconversion fluorescent crystals have potential applications in the biomedical field.
机译:稀土Yb 3 + 和Ho 3 + 共掺杂氟磷灰石(FA:Yb 3 + / Ho 3 + )晶体通过水热合成制备,并对其结构,上转换特性,细胞增殖和成像进行了研究。合成的晶体尺寸为16×286?nm,具有经典FA的六方晶体结构,Ca / Yb / Ho摩尔比为100/16 / 2.1。首次提出了沿FA晶体晶胞氟通道的几个合理的Yb 3 + / Ho 3 + 嵌入晶格模型,例如(Ca < sub> 7 YbHo?)(PO 4 6 F 2 和(Ca 6 YbHoNa 2 )(PO 4 6 F 2 。发现活化的FA:Yb 3 + / Ho 3 + 晶体具有明显的上转换荧光。可以分别将发射光谱中的543和654 nm信号分配给 5 F 4 ( 5 S 2 )- 5 I 8 和 5 F 5 - 5 I 8 跃迁通过980 nm近红外激发和的能量转移。用亲水性葡聚糖接枝表面后,晶体显示清晰的荧光细胞成像。因此,制备的新型FA:Yb 3 + / Ho 3 + 上转换荧光晶体在生物医学领域具有潜在的应用前景。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号