Three Generations of Surface Nanocomposites Based on Hexagonally Ordered Gold Nanoparticle Layers and Their Application for Surface-Enhanced Raman Spectroscopy

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dc.contributor.authorZangana, Shereencs
dc.contributor.authorLednický, Tomášcs
dc.contributor.authorBonyár, Attilacs
dc.coverage.issue4cs
dc.coverage.volume11cs
dc.date.issued2023-04-01cs
dc.description.abstractThe fabrication technology of surface nanocomposites based on hexagonally ordered gold nanoparticle (AuNP) layers (quasi-arrays) and their possible application as surface-enhanced Raman spectroscopy (SERS) substrates are presented in this paper. The nanoparticle layers are prepared using a nanotextured template formed by porous anodic alumina (PAA) and combined with gold thin-film deposition and subsequent solid-state dewetting. Three types of hexagonal arrangements were prepared with different D/D-0 values (where D is the interparticle gap, and D-0 is the diameter of the ellipsoidal particles) on a large surface area (similar to cm(2) range), namely, 0.65 +/- 0.12, 0.33 +/- 0.10 and 0.21 +/- 0.09. The transfer of the particle arrangements to transparent substrates was optimized through three generations, and the advantages and disadvantages of each transfer technology are discussed in detail. Such densely packed nanoparticle arrangements with high hot-spot density and tunable interparticle gaps are very beneficial for SERS applications, as demonstrated with two practical examples. The substrate-based enhancement factor of the nanocomposites was determined experimentally using a DNA monolayer and was found to be between 4 x 10(4) and 2 x 10(6) for the different particle arrangements. We also determined the sensing characteristics of a small dye molecule, rhodamine 6G (R6G). By optimizing the experimental conditions (e.g., optimizing the laser power and the refractive index of the measurement medium with an ethylene-glycol/water mixture), concentrations as low as 10(-16) M could be detected at 633 nm excitation.en
dc.formattextcs
dc.format.extent1-14cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationChemosensors. 2023, vol. 11, issue 4, p. 1-14.en
dc.identifier.doi10.3390/chemosensors11040235cs
dc.identifier.issn2227-9040cs
dc.identifier.orcid0000-0003-0564-1862cs
dc.identifier.other184132cs
dc.identifier.urihttp://hdl.handle.net/11012/213689
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofChemosensorscs
dc.relation.urihttps://www.mdpi.com/2227-9040/11/4/235cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2227-9040/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectAuNPsen
dc.subjectnanocompositeen
dc.subjectSERSen
dc.subjectDNAen
dc.subjectR6Gen
dc.titleThree Generations of Surface Nanocomposites Based on Hexagonally Ordered Gold Nanoparticle Layers and Their Application for Surface-Enhanced Raman Spectroscopyen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-184132en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:50:15en
sync.item.modts2025.01.17 16:44:08en
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Chytré nanonástrojecs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Sdílená laboratoř RP1cs
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