A nanoimprinted plasmonic substrate for both local preconcentration and SERS detection

Ding Zheng Lin, Tien Li Chang, Jen You Chu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we present a novel plasmonic substrate for both local preconcentration and surface enhanced Raman scattering (SERS) detection. The plasmonic substrate is fabricated by nanoimprint process and then overlaid a thin silver film to adjust the surface plasmon resonance wavelength. Both photothermal conversion and SERS-active wavelength are designed for He-Ne Laser. The measurement process includes three steps. First of all, local concentration is performed by laser induced heating on the plasmonic substrate (over 100°C) to create a small bubble in high power mode (10mW). Then turn off the laser, the target analyte (Rhodamine 6G solution) will concentrate to the center as the bubble disappeared. Finally, the SERS spectra are taken in low power mode (1mW). The intensity of SERS signal at the concentrated region is an order of magnitude larger than the untreated region. The repeatability of this preconcentration process makes it a good candidate to amplify small SERS signals especially for trace detections.

Original languageEnglish
Title of host publicationPlasmonics
Subtitle of host publicationMetallic Nanostructures and Their Optical Properties VIII
Volume7757
DOIs
Publication statusPublished - 2010 Dec 1
Externally publishedYes
EventPlasmonics: Metallic Nanostructures and Their Optical Properties VIII - San Diego, CA, United States
Duration: 2010 Aug 12010 Aug 5

Other

OtherPlasmonics: Metallic Nanostructures and Their Optical Properties VIII
CountryUnited States
CitySan Diego, CA
Period10/8/110/8/5

Keywords

  • Bubble
  • Concentration
  • Nanoimprint
  • Photothermal
  • Surface enhanced Raman scattering (SERS)

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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  • Cite this

    Lin, D. Z., Chang, T. L., & Chu, J. Y. (2010). A nanoimprinted plasmonic substrate for both local preconcentration and SERS detection. In Plasmonics: Metallic Nanostructures and Their Optical Properties VIII (Vol. 7757). [77572D] https://doi.org/10.1117/12.860572