Abstract
A novel surface plasmon resonance (SPR)-based fiber optic arsenic [As (III)] sensor is presented using core-shell nanostructure [abbreviated as () CS] synthesized using hydrolysis. Due to its extraordinary properties, such as very large surface area, great adsorption capabilities, and chemical reactivity, nanoparticles offer excellent sensitivity and selectivity for As (III), while shows great catalytic properties. To achieve the best sensing performance, the () CS is synthesized at different temperatures, and its morphological study is carried out using transmission electron microscopy. The performance of the probe fabricated over the silver-coated unclad core of the fiber with optimized fabrication temperature and attachment time of () CS is investigated for 0–100 μg/L concentration of As (III). The sensor possesses the limit of detection of 0.47 μg/L. Further, the roles of common interferands in sensor performance are investigated. The sensor possesses the advantages of real-time detection, capability of remote sensing, and online monitoring, which uphold its industrial application.
© 2018 Optical Society of America
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