Silver nanoparticles with reduced graphene oxide for surface-enhanced vibrational spectroscopy of DNA constituents

Siim Heinsalu, Olena Fesenko, Aleksei Treshchalov, Serhii Kovalchuk, Andrii Yaremkevych, Vladyslav Kavelin*, Leonid Dolgov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Composite of silver nanoparticles with reduced graphene oxide flakes is proposed for surface enhanced vibrational spectroscopy, particularly for detection of adenine and thymine as constituents of deoxyribonucleic acid. Composite was formed by original method implying simultaneous reduction of silver ions and graphene oxide by discharge plasma at the gas–liquid interface. Combination of nanosized silver with reduced graphene oxide provided greater enhancement of Raman light scattering and infrared light absorption in comparison with separately used components. Addition of the composite to water solutions of adenine and thymine allowed detection of these analytes at micromolar concentrations. Composite of nano-silver with reduced graphene oxide can be prospective for surface enhanced spectroscopy as an alternative to the expensive lithographically prepared noble metal substrates.

Original languageEnglish
Pages (from-to)1075-1083
Number of pages9
JournalApplied Nanoscience (Switzerland)
Volume9
Issue number5
DOIs
Publication statusPublished - 2019 Jul 1

Keywords

  • Adenine
  • Discharge plasma
  • Reduced graphene oxide
  • Silver nanoparticles
  • Surface Enhanced InfraRed Absorption (SEIRA)
  • Surface Enhanced Raman Scattering (SERS)
  • Thymine

ASJC Scopus subject areas

  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Materials Science (miscellaneous)
  • Physical and Theoretical Chemistry
  • Cell Biology
  • Electrical and Electronic Engineering

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