Surface-enhanced Raman scattering in ETPTA inverse photonic crystals with gold nanoparticles

  • Phys Chem Chem Phys. 2021 Sep 22;23(36):20275-20281. doi: 10.1039/d1cp02958d.
Matin Ashurov  1 ,  Bakhodur Abdusatorov  2 ,  Alexander Baranchikov  3 ,  Sergey Klimonsky  1  4
Affiliations
  • 1. Faculty of Materials Science, Lomonosov Moscow State University, Moscow, 119991, Russia.
  • 2. HSM Laboratory, Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Moscow, 121205, Russia.
  • 3. Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Moscow, 119991, Russia.
  • 4. Department of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia. [email protected].
PMID: 34486005 DOI: 10.1039/d1cp02958d
Abstract

We present a substrate design for surface-enhanced Raman scattering by decorating three-dimensional inverse photonic crystals with a small amount of Au nanoparticles. Photonic crystals with different positions of the photonic stop band were fabricated by inverting opal-type templates using photopolymerization of a trimethylolpropane ethoxylate triacrylate (ETPTA) photocurable resin. Then Au nanoparticles were embedded into inverse ETPTA films by multiple infiltration. Using the methylene blue dye as a test compound, we found that the enhancement factor of the Raman signal is strongly dependent on the spectral position of the photonic stop band, reaching a value of about 1-2 × 105 when it coincides with the laser wavelength. The detection limit for methylene blue in solution is of the order of 10-7 M.

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