Condensed Matter

Journal of Experimental and Theoretical Physics Letters

, Volume 74, Issue 6, pp 309-311

First online:

Raman scattering enhancement using crystallographic surface of a colloidal crystal

  • S. V. GaponenkoAffiliated withInstitute of Molecular and Atomic Physics, National Academy of Sciences of Belarus
  • , A. A. GaidukAffiliated withInstitute of Molecular and Atomic Physics, National Academy of Sciences of Belarus
  • , O. S. KulakovichAffiliated withInstitute of Molecular and Atomic Physics, National Academy of Sciences of Belarus
  • , S. A. MaskevichAffiliated withKupala State University
  • , N. D. StrekalAffiliated withKupala State University
  • , O. A. ProkhorovAffiliated withInstitute for Powder Metallurgy
  • , V. M. ShelekhinaAffiliated withInstitute for Powder Metallurgy

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Abstract

Deposition of coinage metals on a crystallographic surface of a colloidal crystal is proposed with the aim of fabricating metal surfaces with a regular relief on a scale of 200–300 nm to get strong surface-enhanced Raman scattering (SERS). The approach is implemented through thin gold-film deposition on a surface of a crystal consisting of silica globules. Mitoxantrone molecules, a DNA intercalator, were used to prove high SERS efficiency of the structures proposed. As compared to other SERS-active substrates, metal-dielectric colloidal crystal structures possess well-defined surface parameters (globule diameter and film thickness), high stability and reproducibility. These advantages are important for systematic analysis of SERS mechanisms in mesoscopic structures and its application in single-molecule detection.

PACS numbers

81.16.−c; 33.20.Fb 82.70.Dd