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- Title
Graphene-Encapsulated Silver Nanoparticles for Plasmonic Vapor Sensing.
- Authors
Piszter, Gábor; Molnár, György; Pálinkás, András; Osváth, Zoltán
- Abstract
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 O2 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.
- Subjects
PYROLYTIC graphite; SILVER nanoparticles; SURFACE plasmon resonance; ATOMIC force microscopy; PLASMONICS; PRINCIPAL components analysis
- Publication
Nanomaterials (2079-4991), 2022, Vol 12, Issue 14, pN.PAG
- ISSN
2079-4991
- Publication type
Article
- DOI
10.3390/nano12142473