Electro-Optic Meta Tweezers for Precise Manipulation and Analysis of Underwater Sub-100 nm Nanoplastics

Nanoplastics (NPLs) are microscopic plastic particles smaller than 1000 nm that pose a significant environmental and health threat. They are frequently released when larger plastic debris pieces decompose, and they can be found everywhere, from marine ecosystems to the food we eat. Detecting NPLs (< 100 nm) is challenging due to the limitations of analytical tools. The ""Nanoplastics (NPLs)-AcquaSENS"" Project seeks to address these challenges by developing an innovative online Field-Flow Fractionation (FFF) coupled with electro-optic meta-sensors for the rapid, non-destructive, and in situ detection of NPLs in aquatic environments. This project will harness the power of advanced numerical simulations, cutting-edge nanolithography, and state-of-the-art instrumentation techniques to create a novel electro-optic meta tweezer. This device will enable the controlled trapping and precise manipulation of NPLs, pushing the boundaries of current detection capabilities. A key component of the project is the measurement of Surface-Enhanced Raman Scattering (SERS) signals from electro-optically trapped NPLs, which will allow for a detailed analysis of the microscopic physics governing these particles in real-world water bodies. The project will overcome diffraction and diffusion limits in NPL detection and have the lowest LoD to date. Additionally, the project will develop a comprehensive, high-resolution SERS spectral library of commonly found plastic materials in drinking waters to provide a standardised reference tool for researchers and practitioners. This SERS library will serve as a critical resource for the identification and characterization of NPLs. Integrating this advanced technology into routine drinking water monitoring protocols has the potential to significantly enhance water quality regulatory frameworks, providing a powerful tool for safeguarding public health. ""