Plasmonic SERS active nanostructured Ag-SiO2 at optimum volume ratio synthesized via sol-gel technique

Document Type

Article

Publication Date

4-1-2021

Abstract

Plasmonic nanostructured silver silica at an optimum volume ratio of silver silica and constant concentration of silver nanoparticles (AgNPs) was successfully synthesized by the sol-gel technique for surface-enhanced Raman scattering (SERS) application. Transmission electron microscopy (TEM) images confirm that the optimum ratio of the nanostructures consists of SiO2 particles partially penetrated and embedded by the Ag NPs with a mean particle size of 35 nm, which are homogeneous and spherical in shape. UV?vis spectroscopy of the optimum ratio shows that the intensity of the Ag?SiO2NCs peak is greatly reduced with a clear and sharp absorption peak. 4Aminobenzenethiol (4-ABT) as the probe molecule greatly enhances the SERS signal. The results from different pH values confirm that the substrate is stable and gives the strongest SERS enhancements in a highly alkaline environment.

Keywords

Sol-gel, SERS, Silver silica, Nanostructure, 4-Aminobenzenethiol

Publication Title

Physica B: Condensed Matter

Divisions

CHEMISTRY,advanced,nanotechnology

Funders

NANOCAT RU Grant 2019,NANOCAT RU2020

Volume

606

Publisher

Elsevier

Publisher Location

RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS

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