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Rh6G-HS based optofluidic laser sensor for selective detection of Cu2+ ions
IEEE Photonics Technology Letters ( IF 2.6 ) Pub Date : 2020-06-15 , DOI: 10.1109/lpt.2020.2993151
Li-Peng Sun , Zhen Sun , Zhenru Li , Yan Huang , Wenfu Lin , Runjia Liu , Wei Wang , Jie Li , Bai-Ou Guan

We experimentally demonstrated a chemical sensing system for Cu2+ detection based on an optofluidic laser. A Fabry–Perot cavity within a square quartz capillary fluidic channel was built to enable optofluidic lasing. Rh6G-HS (Rh6G, hydrazine hydrate, salicylaldehyde), a rhodamine derivative was used as the laser gain medium, and the switching mechanism of spirolactam (fluorescence: “off”) to ring-opened amide (fluorescence: “on”) was used to provide strong fluorescence emission with the addition of Cu2+ ions. As the Cu2+ ion concentration increased, the optofluidic laser slope efficiency was enhanced and the lasing threshold was reduced. Under optimized conditions, the chemosensor exhibited a detection limit of $300~\mu \text{M}$ and satisfactory selectivity toward Cu2+ ions over other metal ions. This method may provide a new way to detect metal ions and could be applied to new applications in environmental protection and biochemical research.

中文翻译:

基于 Rh6G-HS 的光流体激光传感器,用于选择性检测 Cu2+ 离子

我们通过实验证明了一种基于光流体激光器的用于 Cu 2+检测的化学传感系统。在方形石英毛细管流体通道内构建了一个法布里-珀罗腔,以实现光流体激光。Rh6G-HS(Rh6G,水合肼,水杨醛),一种罗丹明衍生物被用作激光增益介质,并使用螺内酰胺(荧光:“关”)到开环酰胺(荧光:“开”)的转换机制添加Cu 2+离子以提供强烈的荧光发射。随着Cu 2+离子浓度的增加,光流体激光斜率效率提高,激光阈值降低。在优化条件下,化学传感器的检测限为 $300~\mu \text{M}$ 对 Cu 2+离子的选择性优于其他金属离子。该方法可能为检测金属离子提供了一种新的方法,可应用于环境保护和生化研究中的新应用。
更新日期:2020-06-15
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