Sonochemically synthesized Ag nanoparticles as a SERS active substrate and effect of surfactant

Nitzan Dar, Kuang Yu Chen, Yung Tang Nien, Nina Perkas, Aharon Gedanken, In Gann Chen

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Abstract Surface enhanced Raman scattering (SERS) enables the detection of substances at low concentrations using silver or gold nanostructure. The SERS technique has many applications, such as environmental detection and biosensing. Sonochemistry is an excellent and cheap deposition technique for coating substrates in a form of nanostructure at ambient temperature. It can also be utilized to prepare large SERS substrates. Here, we used the advantages of sonochemistry to deposit solid SERS substrates immobilized on GaN nanostructure. Morphology was studied by scanning electron microscopy. The elemental composition and the spatial distribution were examined by energy dispersive X-ray spectroscopy. The crystal structure and atomic presence was confirmed by X-ray diffraction. SERS substrates were examined with the analytes crystal violet (10 -5 M) and rhodamine 6G (10 -6 M), they showed prominent characteristic peaks. We discovered that the SERS intensity of poly-vinyl-pyrrolidinone aided sonochemical deposition of Ag nanoparticles was increased. The reason for the effect is morphological changes of the Ag nanoparticles. Smaller nanoparticles were fabricated, which increase their SERS intensity.

Original languageEnglish
Article number29481
Pages (from-to)219-224
Number of pages6
JournalApplied Surface Science
Volume331
DOIs
Publication statusPublished - 2015 Mar 15

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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