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Published on: August 18, 2020
Multimodal Plasmonic Assay of Copper(II) Ion via Stimuli-Responsive State Transformation of Silver Molecular
Yang Chen1, Danyang Yin1, Yanyan Ma1
1State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210023, China.
Abstract:
Molecular nanoparticles (MNPs) have gained increased attention recently due to their unique structures and properties. However, their applications remain largely unexplored. Herein, we present an Ag MNPs-based multimodal plasmonic assay. This assay relied on changes in optical properties due to stimuli-responsive state trans-formation from MNPs to plasmonic nanoparticles (PNPs). As a proof-of-concept, naked-eye colorimetric assay, spectrophotometric assay and "turn-on" Raman assay of Cu(2+) were developed. The feasibility of this approach for real-world applications was demonstrated with the determination of Cu(2+) in human serum. This multimodal plasmonic assay exhibited several significant advantages, including selectivity, sensitivity, label-free nature, and multimodal capability. Because of these merits, Ag MNPs could be promising nanosensors for wide important applications such as diagnostics and environmental analysis.
