Surface enhanced Raman scattering of crystal violet

Robin Jones, Tim Batten, Brian Smith, Alejandro V. Silhanek, Daniel Wolverson, Ventsislav Valev

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

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Abstract

Despite the ubiquity of Raman spectroscopy, fluorescence, poor signal strength and photobleaching pose a significant challenge to researchers in the biomedical field. Here, we demonstrate a 17-fold signal enhancement in Raman spectra of crystal violet via surface-enhanced Raman scattering (SERS). The SERS substrate was fabricated by electron beam lithography (EBL); the nanostructured surface was an array of G-shaped elements made of Au on SiO2/Si. In addition to the SERS spectra, finite-difference time-domain simulations were performed to illustrate the distribution of electric-field hot-spots on the SERS substrate. The electric-field hot-spots were prominent at the vertices and edges of the nanostructured G-shaped motifs. The results presented here demonstrate that EBL is a high-end choice for SERS substrate fabrication that opens the way for more complex Raman spectroscopies, for instance involving nonlinear optics or chiral analytes.
Original languageEnglish
Title of host publicationProceedings of SPIE
Subtitle of host publicationNonlinear Optics and Applications XII
Chapter11770
Number of pages7
Volume11770
EditionMay
DOIs
Publication statusPublished - 18 Apr 2021

Keywords

  • Surface enhanced Raman scattering
  • crystal violet
  • finite-difference time-domain simulation
  • electron beam lithography

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