Graphene-Encapsulated Silver Nanoparticles for Plasmonic Vapor Sensing

Piszter, Gábor and Molnár, György and Pálinkás, András and Osváth, Zoltán (2022) Graphene-Encapsulated Silver Nanoparticles for Plasmonic Vapor Sensing. NANOMATERIALS, 12 (14). ISSN 2079-4991


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Graphene-covered silver nanoparticles were prepared directly on highly oriented pyrolytic graphite substrates and characterized by atomic force microscopy. UV-Vis reflectance spectroscopy was used to measure the shift in the local surface plasmon resonance (LSPR) upon exposure to acetone, ethanol, 2-propanol, toluene, and water vapor. The optical responses were found to be substance-specific, as also demonstrated by principal component analysis. Point defects were introduced in the structure of the graphene overlayer by O-2 plasma. The LSPR was affected by the plasma treatment, but it was completely recovered using subsequent annealing. It was found that the presence of defects increased the response for toluene and water while decreasing it for acetone.

Item Type: Article
Uncontrolled Keywords: SIZE; OPTICAL-PROPERTIES; Nanostructures; shape; GOLD NANOPARTICLES; Silver nanoparticles; Materials Science, Multidisciplinary; Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Graphene coating; LSPR-based sensing;
Subjects: T Technology / alkalmazott, műszaki tudományok > TK Electrical engineering. Electronics Nuclear engineering / elektrotechnika, elektronika, atomtechnika
Depositing User: MTMT SWORD
Date Deposited: 07 Sep 2022 14:43
Last Modified: 07 Sep 2022 14:43

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