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      An array of surface-enhanced Raman scattering substrates based on plasmonic lenses

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      Author
      Kahraman, M.
      Cakmakyapan, S.
      Özbay, Ekmel
      Culha, M.
      Date
      2012-10-01
      Source Title
      Annalen der Physik
      Print ISSN
      0003-3804
      Publisher
      Wiley
      Volume
      524
      Issue
      11
      Pages
      663 - 669
      Language
      English
      Type
      Article
      Item Usage Stats
      159
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      105
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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 focusing
      Ring-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
      Permalink
      http://hdl.handle.net/11693/21274
      Published Version (Please cite this version)
      http://dx.doi.org/10.1002/andp.201200126
      Collections
      • Department of Electrical and Electronics Engineering 3524
      • Department of Physics 2299
      • Nanotechnology Research Center (NANOTAM) 1006
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