20.500.12556/DiRROS-29577 Directed gold nanoparticle synthesis with plasma-activated water Plasma-activated water (PAW) enables surfactant-free synthesis of gold nanoparticles (AuNPs) at room temperature and acts as a reaction medium with tuneable reactive oxygen and nitrogen species (ROS and RNS), decoupled from the plasma discharge. Treating deionised water with an argon atmospheric-pressure plasma jet for 1–16 min increased H2O2 concentration from 0 to 8 mM, lowered pH from 7.0 to 3.5, and raised the oxidation–reduction potential from 0 to 400 mV, while maintaining negligible RNS levels. These changes directly influence Au3+ reduction and AuNP growth. At 1.00 mM [Au3+], increasing PAW activation time from 1 to 16 min shortened the reduction time tenfold and shifted the LSPR maximum from 610 to 538 nm, with particle size decreasing from 120 nm to about 80 nm. Using the most reactive PAW (16 min), decreasing [Au3+] from 1.00 to 0.10 mM reduced the mean AuNP size from 80 to 35 nm, yielding uniform, well-faceted nanoparticles. Weakly activated PAW (1–2 min) yields slower, partially incomplete reduction, broader size distributions, and more planar nanoparticles. These results establish PAW as a sustainable method for directed AuNP reduction kinetics, size, morphology, and optical response without external reducing or capping agents. gold nanoparticles plasma-activated water tunable synthesis surfactant-free synthesis zlati nanodelci true false true Elsevier Nizozemska Angleški jezik Slovenski jezik © 2026 The Authors. Neznano 2026-05-28 14:09:24 2026-05-28 14:09:25 2026-05-29 03:56:22 0000-00-00 00:00:00 2026 0 0 Nasl. z nasl. zaslona; Soavtorji: Damjan Vengust, Janez Zavašnik, James Walsh, Uroš Cvelbar, Martina Modic, Vasyl Shvalya; Opis vira z dne 21. 5. 2026; str. 1-19 Vol. , article no. 116254 [in press] 2026 0000-00-00 Zaloznikova Objavljeno apc 2026-02-13 2026-05-17 2026-05-18 620.3:533 1873-4197 10.1016/j.matdes.2026.116254 278942211 https://www.sciencedirect.com/science/article/pii/S0264127526008270?via%3Dihub 1 12f12e9f-5a8e-11f1-8e51-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=44384 RAZ_Strbac_Jelena_2026.pdf RAZ_Strbac_Jelena_2026.pdf 1 371B3DCC0557BF174D35BC2FCA80AF6C 7ec6ced11c945b901b4f900518cd4dae38f0e08b388305a66acd9e92772eca28 65265867-5a8e-11f1-8e51-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=44385 Institut Jožef Stefan 0 0 0