An array of surface-enhanced Raman scattering substrates based on plasmonic lenses
Author
Kahraman, M.
Cakmakyapan, S.
Özbay, Ekmel
Culha, M.
Date
2012-10-01Source Title
Annalen der Physik
Print ISSN
0003-3804
Publisher
Wiley
Volume
524
Issue
11
Pages
663 - 669
Language
English
Type
ArticleItem Usage Stats
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Abstract
An array of ring-shaped holes is prepared from silver thin films using electron beam lithography. The optimal conditions for high performance as a surface-enhanced Raman scattering (SERS) substrate are investigated. Either the diameter of the hole (0.5, 1.0, 2.0, 3.0 and 4.0 μm) or the slit width (200, 300, 400, 500 and 600 nm) is varied. 4-Aminothiophenol (ATP) adsorbed on the structures as a self-assembled monolayer (SAM) is used as probe to evaluate the SERS performance of the generated structures. It is found that there is an optimal configuration for ring-shaped holes with a 3.0-μm diameter and 200-nm slit width. The SERS activity on this optimal lens configuration is found to be 13 times greater than that of the activity on the silver thin film. An array of these structures at this optimal configuration can easily be constructed and used in a range of SERS-based sensing applications. An array of ring-shaped holes is prepared from silver thin films using electron beam lithography. The optimal conditions for high performance as a surface-enhanced Raman scattering (SERS) substrate are investigated. It is found that there is an optimal configuration for ring-shaped holes with a 3.0-μm diameter and 200-nm slit with. The SERS activity on this optimal lens configuration is found to be 13 times greater than that of the activity on the silver thin film.
Keywords
Plasmon focusingRing-shaped holes
SERS
Substrate
4-aminothiophenol
Optimal conditions
Optimal configurations
Plasmonic lens
Ring-shaped holes
Sensing applications
Silver thin films
Slit width
Surface enhanced Raman scattering (SERS)
Electron beam lithography
Film preparation
Optimization
Plasmons
Raman scattering
Self assembled monolayers
Silver
Surface scattering
Thin films
Substrates