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.
JOURNAL OF MATERIALS SCIENCE

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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, pp. 16345–16356, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39325.