Chitosan/Polyacrylic Acid Functionalized Side-Polish Polymer Optical Fiber-Based SPR Sensor for Cu2+ Ion Detection
A polymer optical fiber SPR sensor for detecting Cu2+ ion concentration in water is proposed. The sensor employs a simple side-polish structure and realizes the detection of Cu2+ ion concentration by employing the chitosan (CS)/polyacrylic acid (PAA) bilayer film on the gold film of the optical fiber surface. The structure of the fiber probe is optimized, and the sensing performances for the Cu2+ ion detection are analyzed experimentally. The experimental results demonstrate that the sensor exhibits a high sensitivity of 465.539 nm/ppm for the Cu2+ ion detection in the concentration range of 0–0.04 ppm. And it has a fast response speed and good selectivity for Cu2+ ions. The sensor has the advantages of simple structure and low cost, and has potential applications in the field of heavy metal detection.
Authors
- Shiyuan Ying
- Shijie Deng (ORCID: https://orcid.org/0000-0002-5468-8504)
- Zining Chen (ORCID: https://orcid.org/0009-0001-6257-2974)
- Chuanxin Teng (ORCID: https://orcid.org/0000-0001-5965-1498)
- Hanli Qiao (ORCID: https://orcid.org/0000-0002-2433-9741)
- Hongyun Xia (ORCID: https://orcid.org/0009-0007-6260-3666)
- Libo Yuan (ORCID: https://orcid.org/0000-0002-2425-4553)
- Yuting Zhang (ORCID: https://orcid.org/0009-0008-9308-6312)
- Yang Rong-ping
- Liying Shi
Institutions
- Geological Survey of Finland (FI)
- Jinggangshan University (CN)
- Guilin University of Electronic Technology (CN)
Publication Details
- Journal
- Photonics
- Published
- 2025-05-09
- DOI
- https://doi.org/10.3390/photonics12050461
- Citations
- 1
- Primary Topic
- Advanced Fiber Optic Sensors
- Type
- article
- Field-Weighted Citation Impact
- 0.73
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Guangxi Province
- Guilin University of Electronic Technology
- Division of Graduate Education