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

Date

2018-12-01

Author

Elcı, Aylin
Demırtas, Ozge
Öztürk, İbrahim Murat
Bek, Alpan
Nalbant Esentürk, Emren

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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.

Subject Keywords

Shell structure nanoparticles, Metal nanoparticles, Catalytic-activity, Plasmon resonance, Spectroscopy, Dynamics, Nanorods, Growth, Films

URI

https://hdl.handle.net/11511/39325

Collections

Department of Physics, Article