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Field-enhancement calculations in plasmonic tagged nanoplastics improved by machine learning
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Researchers used computer modeling and machine learning to predict how tiny metal particles attached to nanoplastics enhance light signals, a method used to detect plastic particles. The combined approach let them test many combinations of plastic and metal particle sizes and materials faster than standard calculations, aiming to help improve detection techniques.
Great scientific interest has recently been directed towards the development of sensitive methods for the detection, monitoring, and characterization of nano-plastics dispersed in the environment. A promising approach to increase sensitivity is based on the use of SERS (Surface-Enhanced Raman Scattering) producing strong, easily recognized signals that allow sensitive and quantitative detection of nano-plastics thanks to the induced electromagnetic field enhancement. Computational approaches capable of simulating such enhanced optical response appear crucial for the development of SERS detection methods. Here, we model a system of plasmonic tagged nanoplastic particles using a rigorous electromagnetic description combined with neural networks to speed up the calculations and explore the field-enhancement response in a wider range of plastics and metal nano-particle size and compositions. Our results show that this combined approach may serve as a rapid tool to explore the parameter space and optimize SERS detection.
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