Functionalized core-shell Ag@TiO 2 nanoparticles for enhanced Raman spectroscopy: a sensitive detection method for Cu(ii) ions

This paper demonstrates the use of surface plasmon resonance of core-shell Ag@TiO2 particles in SHINERS experiments. A copper(ii) complex grafted onto Ag@TiO2 surface was probed by Raman spectroscopy using resonance excitation profiles vs. excitation wavelengths (514, 633 and 785 nm) to tune the Ram...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2019-02, Vol.21 (6), p.3066-3072
Main Authors: Forato, Florian, Talebzadeh, Somayeh, Rousseau, Nicolas, Mevellec, Jean-Yves, Bujoli, Bruno, Knight, D Andrew, Queffélec, Clémence, Humbert, Bernard
Format: Article
Language:English
Subjects:
Chemical Sciences
Material chemistry
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Summary:This paper demonstrates the use of surface plasmon resonance of core-shell Ag@TiO2 particles in SHINERS experiments. A copper(ii) complex grafted onto Ag@TiO2 surface was probed by Raman spectroscopy using resonance excitation profiles vs. excitation wavelengths (514, 633 and 785 nm) to tune the Raman signals. Enhancement factors of the SHINERS assembly have been estimated and compared to the SERS effect of unmodified silver NPs colloidal dispersions. Finally, the grafting of the copper(ii) complex onto Ag@TiO2 was advantageously compared to the grafting onto Ag@SiO2 shell.
ISSN:1463-9076
1463-9084
DOI:10.1039/C8CP07504B