20.500.12556/RUL-169468 Addressing SERS challenges of nanoplastics with vertical plasmonic substrates Nanoplastics, an increasingly concerning environmental pollutant, are extremely difficult to detect using conventional analytical techniques. Many methods fail in this regard, but surface-enhanced Raman scattering (SERS) offers a promising solution by utilising specialised nanostructures that amplify signals. In this study, we build upon previous nanoparticle-based advancements by introducing grating-like 2D carbon nanowalls with controlled spacing. When coated with a thin gold layer, this network of vertically aligned nanowalls demonstrates high SERS signal enhancement and stability, with measured values fluctuating only within a few per cent (RSD ⁓ 5%). This performance surpasses that of randomly assembled nanoparticle substrates reported in the state-of-the-art and other 3D substrates tested in this study, such as branched carbon nanotubes and vertically aligned carbon nanocones. Our primary objective was to demonstrate that the detection case “particle between the walls:” generates a signal up to an order of magnitude higher than the detection “on top of the ridges”. These results emphasise the importance of near-field enhancements when the investigated particles are in the proximity of hot junctions with confined electric fields. Finally, the vertical nanostructures that allow the trapping of particles between the walls reveal great promise for identifying ultra-small nanoplastics (100 nm and below) using SERS. nanoplastics surface enhanced Raman scattering SERS vertical nanostructures plasmonics nanowalls 2D nanowalls nanoplastika true false true Angleški jezik Slovenski jezik Članek v reviji 2025-05-29 12:15:24 2025-05-29 12:15:52 2025-05-30 04:20:09 0000-00-00 00:00:00 2025 0 0 8 str. Vol. 69, art. 106780 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.1/.2 2468-0230 10.1016/j.surfin.2025.106780 236978691 1-s2.0-S2468023025010375-main.pdf 1-s2.0-S2468023025010375-main.pdf 1 7F8DD1E92206BA518F5F27EF4E3D6945 52f9dd0e1ae0f67f4a7b7de943c7d0ef197223102d744057aebb868d57daf4cc e428fb1a-3c74-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=210869 https://www.sciencedirect.com/science/article/pii/S2468023025010375 0 9b2a0631-3c74-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=210868 Fakulteta za matematiko in fiziko 0 0 0