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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
Metadata
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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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
Journal
JOURNAL OF MATERIALS SCIENCE
DOI
https://doi.org/10.1007/s10853-018-2792-4
Collections
Department of Physics, Article