Synthesis of tin oxide-coated gold nanostars and evaluation of their surface-enhanced Raman scattering activities


Elcı A., Demırtas O., Öztürk İ. M. , Bek A. , Esenturk E.

JOURNAL OF MATERIALS SCIENCE, vol.53, pp.16345-16356, 2018 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 53
  • Publication Date: 2018
  • Doi Number: 10.1007/s10853-018-2792-4
  • Title of Journal : JOURNAL OF MATERIALS SCIENCE
  • Page Numbers: pp.16345-16356

Abstract

Tin oxide-coated gold nanostar hybrid nanostructures are prepared by first synthesizing gold nanostars (ca. 400nm), then introducing Na2SnO3 precursor followed by its hydrolysis and formation of a tin oxide layer on nanoparticle surface. The synthesized hybrid structures have been characterized by combination of UV-Vis spectroscopy, transmission electron microscope (TEM), energy-dispersive X-ray studies, scanning electron microscope (SEM), X-Ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. The TEM and SEM analyses showed that gold nanostars have a coating with an approximate thickness of 15nm. The tin (IV) oxide coating on the gold nanostars was identified by XRD and XPS analyses and confirmed by FTIR spectroscopy. Surface-enhanced Raman scattering (SERS) spectroscopy was performed on tin oxide-coated and uncoated gold nanostars with crystal violet as a probe molecule. The SERS studies revealed field enhancement properties of Au nanostars, thus their strong SERS activity remained after tin oxide coating.