Size Dependence of Nanoparticle-SERS Enhancement from Silver Film over Nanosphere (AgFON) Substrate

W.-C. Lin, L.-S. Liao, Y.-H. Chen, H.-C. Chang, Din-ping Tsai, H.-P. Chiang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

77 Citations (Scopus)

Abstract

The dependence of nanoparticle size on surface-enhanced Raman scattering (SERS) from silver film over nanospheres substrate is studied. For a range of nanosphere sizes from 430 to 1,500 nm, optimum SERS signal is obtained with a nanosphere size of 1,000 nm at an excitation wavelength of 532 nm. We have clarified the physical origin of this optimization in an unambiguious way as due to resonant plasmonic excitations from 3D finite-difference time-domain simulations, as well as with the assistance of UV-visible reflectance spectrum. © Springer Science+Business Media, LLC.2010.
Original languageEnglish
Pages (from-to)201-206
Number of pages6
JournalPlasmonics
Volume6
Issue number2
DOIs
Publication statusPublished - 1 Jun 2011
Externally publishedYes

Keywords

  • Enhanced factor (EF)
  • Finite-difference time-domain (FDTD)
  • Nanosphere lithography (NSL)
  • Silver film over nanospheres (AgFON)
  • Surface-enhanced Raman scattering (SERS)

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Biochemistry

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