大动态范围的双模式pH传感器通过染料合的离子液体光流体纤维激光器
Zhi Li1, Dongyang Li1, Mengda Zhang1
1Department of Physics, Yunnan University, Kunming 650091, China. zyx74635@163.com.
The Analyst
|September 5, 2023
概括
我们开发了一种新的光纤流体激光器 (FOFL),使用罗达胺B合离子液体,用于高度敏感的pH感应. 这种基于激光的传感器提供了一种双感应机制,与传统光方法相比,其灵敏度显著提高.
科学领域:
- 光流体学是一种光流体学.
- 激光技术 激光技术 激光技术
- 化学传感器 化学传感器
背景情况:
- 光纤流体激光器 (FOFL) 为传感应用提供了独特的优势.
- 离子液体提供可调节的光学特性和稳定性作为增强介质.
- 罗达胺B (RhB) 是一种众所周知的光染料,具有pH值依赖的特性.
研究的目的:
- 开发一种高度灵敏的pH传感器,使用具有离子液体增益介质的FOFL.
- 为了研究FOFL系统在响应不同pH值时的双重传感能力.
- 为了将FOFL传感器的灵敏度和性能与传统的光方法进行比较.
主要方法:
- 使用Rhodamine B-doped BmimPF6离子液作为增益介质制造FOFL.
- 描述FOFL的激光性能,包括值和发射频谱.
- 系统评估FOFL传感器对不同pH值 (4.28-11.17) 的反应.
- 对波长转移和强度变化的分析,以确定pH值.
主要成果:
- 该FOFL显示了0.61μJmm-1.1的低激光值.
- 在pH范围为4.28-6.37,在激光发射波长中观察到单调的蓝色转移,灵敏度为5.02nm/pH单位.
- 在性条件下 (pH 7.20-11.17),激光强度显著下降,蓝色移动为3.03nm/pH单位.
- 与光传感器相比,FOFL传感器在波长变化中的灵敏度高出4倍,在强度变化中的灵敏度高出3倍.
结论:
- 开发的FOFL系统为pH检测提供了一个新的双传感范式.
- 离子液体增益介质可以实现大动态范围和高灵敏度的pH传感.
- 这种方法显著提高了pH测量的可靠性和区分能力.
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