Vega Reyes, Tatiana P.

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    Surface Enhanced Raman Scattering (SERS) for the detection of traces of glyphosate
    (2024-07-09) Vega Reyes, Tatiana P.; Hernández Rivera, Samuel P.; College of Arts and Sciences - Sciences; Torres Candelaria, Jessica; Mina Camilde, Nairmen; Department of Chemistry; Morales Payan, Pablo
    Since the Second World War, herbicides have played a fundamental role in agriculture, helping to control unwanted plant growth in crops. Their correct use is paramount, as misapplication can significantly impact plant health and the environment. Phytotoxicity, adverse effects on plant growth and metabolism due to chemical exposure, is a recognized concern. Herbicides, constituting over 75% of all agricultural pesticides in the United States, pose risks to human health, wildlife, and the environment, necessitating stringent regulation by the EPA. While sensitive, traditional detection methods such as HPLC and GC involve time-consuming sample preparation. Surface Enhanced Raman Scattering (SERS) emerges as a promising alternative to established methods of analyzing herbicides. SERS leverages surface plasmons, dramatically enhancing Raman emission. The resonance between the metal nanostructure and the excitation laser wavelength is crucial, with silver (Ag) and gold (Au) being the most used metals. SERS offers signal enhancements of up to 10^12 compared to traditional Raman techniques, potentially revolutionizing herbicide detection and contributing to enhanced agricultural and environmental safety. This study introduces a novel approach to detecting glyphosate herbicides using Ag and Au colloids under varying concentrations. Active SERS substrates on stainless steel were created using a chemical printer, yielding promising results for herbicide detection. This research not only presents a rapid and efficient solution for herbicide detection in various crops but also offers significant advancements in the field, making a unique contribution to the scientific community.