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
Divisions
CHEMISTRY,advanced,nanotechnology
Funders
NANOCAT RU Grant 2019,NANOCAT RU2020
Publication Title
Physica B: Condensed Matter
Volume
606
Publisher
Elsevier
Publisher Location
RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS