期刊:IEEE Sensors Journal [Institute of Electrical and Electronics Engineers] 日期:2023-08-01卷期号:23 (15): 16585-16592被引量:1
标识
DOI:10.1109/jsen.2023.3285222
摘要
In this article, an optical microfiber coupler (OMC) ultrasensitive fiber optic sensor based on $\alpha $ -Fe 2 O 3 @MoS 2 functionalization is proposed for ultralow concentration specificity detection of cadmium ions (Cd 2+ . First, the optimal diameter and optimal spectrum of OMC were explored experimentally. Second, the functional group functionalization method is used to closely integrate the α-Fe 2 O 3 @MoS 2 with the OMC cone. Finally, the fiber optic sensor was designed to achieve ultralow trace detection of the Cd $^{{2}+}$ . The results show that in the range of 0– $1 \mu \text{M}$ , the maximum detection sensitivity of Cd $^{{2}+}$ is 9758.92 nm/ $\mu \text{M}$ , the linearity is good, about 0.976, and the minimum detection concentration is $0.0001 \mu \text{M}$ (about 0.0182 ppb). At the same time, the sensor also has good performance in terms of responsiveness, selectivity, reversibility, and stability. It has potential applications in the detection of Cd $^{{2}+}$ in different solution environments.