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

2018-12-01
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.

Citation Formats
A. Elcı, O. Demırtas, İ. M. Öztürk, A. Bek, and E. Nalbant Esentürk, “Synthesis of tin oxide-coated gold nanostars and evaluation of their surface-enhanced Raman scattering activities,” JOURNAL OF MATERIALS SCIENCE, vol. 53, pp. 16345–16356, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39325.