Atomically Layered\nBronze Nanoalloy Featuring Perpetual\nAureolin Fluorescence Adept Microplastic Identification Less than\n1 μm in Water

Nanoalloys have always been fascinating to the scientific\ncommunity\nbecause of their promising physical and chemical properties. Focusing\non the long-lasting properties of nanoalloys, we report the synthesis\nof a 2D layered bronze nanoalloy (LBNA) at room-temperature. The hybrid\nmethodology implied is dependent upon hetero and homocatenation of\nCu and Sn metal ions, utilizing orthoestering capabilities from trimethyl\northoformate (TMOF). The developed nanostructure inherits a mesmeric\nbronze color when seen under ambient light, and possesses a bright\naureolin fluorescence under UV-illumination. The capability of synthesized\nbronze nanoalloy has been explored for time-dependent identification\nof <1 μm melamine based microplastic in drinking water and\nseawater. Increasing microplastic pollutants have caused various health\nissues, and environmental concerns have inspired this study. Both\nwaste and reactive microplastics have surpassed permissible estimates.\nIn aqueous conditions, the LBNA nanomaterial has shown a highly specific\nresponse toward melamine-based microplastic detection, which results\nin a change of emission toward blue color. The interaction mechanism\nstrongly comprehends LBNA having rational bonding with melamine adducts\nin both drinking and seawater. The linearity response of LBNA has\nshown a record low period with an <i>R</i><sup>2</sup> of\n0.9516 and an LOD of 0.03 PPM in drinking water. This size-specific\nmelamine identification will enhance water quality and management.