Work

SERS in opal-type stripe patterned structures with metal coating

Year: 2025

Type: article

Abstract: Bilayer opal-type stripes periodically arranged on the same substrate were self-assembled using the vertical deposition of SiO2 spheres with the intermittent motion of the meniscus. It has been shown that each such stripe with a gold or silver coating can be considered as an independent element for surface enhanced Raman scattering (SERS). Monolayer or bilayer stripes of such type are not inferior to thick opal films with noble metal coating. The stripe patterned structures are easy to manufacture, exhibit good homogeneity and may be promising for automating multiple SERS tests. The structures with gold coating also demonstrate high resistance to environmental influences. To understand the prospects for further improvement of their properties, the obtained experimental data were compared with computer simulation of the enhancement of the electromagnetic field around the contact points of the spheres.

Source: Photonics and Nanostructures - Fundamentals and Applications

DOI: 10.1016/j.photonics.2025.101384