This analysis demonstrates strong sensitivity for cadmium ions detection using gold/graphene oxide, indicating effective monitoring potential.
This study explores the integration of graphene oxide (GO) into a gold surface to form a gold/graphene oxide (Au/GO) bilayer as the sensing interface in the surface plasmon resonance (SPR) sensor for cadmium ions (Cd²⁺) detection in aqueous solutions. The sensor displays a solid reaction within a wide concentration range of 0-1000 ppm, making it suited for environmental and industrial monitoring. The sensor exhibits a sensitivity of 0.04° ppm-1, a low limit of detection (LOD) of 0.77 ppm, and a high binding affinity constant of 0.637 ppm-1, indicating strong interaction between Cd²⁺ ions and the Au/GO interface. Additional performance metrics, including detection accuracy (DA) and a signal-to-noise ratio (SNR) were also investigated. These results highlight the potential of the Au/GO-based SPR platform as a promising tool for real-time, label-free monitoring of cadmium contamination in environmental samples.
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Anuar et al. (2025) studied this question.
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