Edge-engineered self-assembled hierarchical plasmonic SERS templates

Nikolaos Pliatsikas*, Kalfagiannis Nikolaos*, John Arvanitidis, Dimitrios Christofilos, Demosthenes C. Koutsogeorgis, Antonia Kagkoura, Khellil Sefiane, Vasileios Koutsos, Panagiotis Patsalas

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Surface enhanced Raman scattering (SERS) has emerged as a reliable and ultra-sensitive sensing technique used in analytical diagnostics, forensics, and biomedical applications. Although SERS may be sensitive enough to
detect single molecules, such extreme performance is achieved with sophisticated and complex nanostructure designs that are hard to implement on an industrial scale. This work presents an understanding of the plasmonic
and wetting phenomena taking place on Ag nanoparticles (supported on Si) produced by laser annealing and dewetting of sputtered ultra-thin layers enabling the fast (<3 min), scalable and cost-effective production of
SERS templates with a hierarchical plasmonic structure. In particular, the produced SERS templates incorporate micron-scale accumulation spots of the Rhodamine 6 G test molecules, superimposed over nano-scale hot spots,
where electric near field enhancement occurs due to plasmon resonances. This combination increases drastically the SERS signal, making it suitable for fast chemical diagnostics.
Original languageEnglish
Article number100186
Number of pages7
JournalApplied Surface Science Advances
Early online date20 Oct 2021
Publication statusPublished - 1 Dec 2021

Keywords / Materials (for Non-textual outputs)

  • Surface enhanced Raman scattering (SERS)
  • Plasmonic nanostructures
  • Self-assembled nanostructures
  • Laser annealing
  • wettability


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