| Title: | Directed gold nanoparticle synthesis with plasma-activated water |
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| Authors: | ID Štrbac, Jelena, Institut "Jožef Stefan" (Author)
ID Vengust, Damjan, Institut "Jožef Stefan" (Author)
ID Zavašnik, Janez, Institut "Jožef Stefan" (Author)
ID Walsh, James L., Institut "Jožef Stefan" (Author)
ID Cvelbar, Uroš, Institut "Jožef Stefan" (Author)
ID Modic, Martina, Institut "Jožef Stefan" (Author)
ID Shvalya, Vasyl, Institut "Jožef Stefan" (Author) |
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| Files: |  URL - Source URL, visit https://www.sciencedirect.com/science/article/pii/S0264127526008270?via%3Dihub
 PDF - Presentation file, download (9,50 MB)
MD5: 371B3DCC0557BF174D35BC2FCA80AF6C
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  IJS - Jožef Stefan Institute
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| Abstract: | 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. |
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| Keywords: | gold nanoparticles, plasma-activated water, tunable synthesis, surfactant-free synthesis |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 13.02.2026 |
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| Article acceptance date: | 17.05.2026 |
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| Publication date: | 18.05.2026 |
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| Publisher: | Elsevier |
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| Year of publishing: | 2026 |
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| Number of pages: | str. 1-19 |
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| Numbering: | Vol. , article no. 116254 |
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| Source: | Nizozemska |
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| PID: | 20.500.12556/DiRROS-29577  |
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| UDC: | 620.3:533 |
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| ISSN on article: | 1873-4197 |
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| DOI: | 10.1016/j.matdes.2026.116254 |
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| COBISS.SI-ID: | 278942211 |
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| Copyright: | © 2026 The Authors. |
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| Note: | Nasl. z nasl. zaslona;
Soavtorji: Damjan Vengust, Janez Zavašnik, James Walsh, Uroš Cvelbar, Martina Modic, Vasyl Shvalya;
Opis vira z dne 21. 5. 2026;
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| Publication date in DiRROS: | 28.05.2026 |
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| Views: | 80 |
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| Downloads: | 70 |
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