Multifunctional bionanocomposites for trace detection of water contaminants

M) in spiked water sample from the Aveiro lagoon. Noteworthy, we associate the improved performance of these substrates to the role of κ-carrageenan, which facilitates the assembly of Ag NPs, creating localized regions of high electromagnetic field intensity, preserving the SERS activity even after eighteen months of storage. The impact of temperature on the SERS signal was evaluated, revealing that the bionanocomposites maintain their activity after experiencing a temperature cycle. These findings indicate that these new SERS substrates are promising for practical sensing applications, particularly for on-site detection of water contaminants in remote regions.