Synthesis of SiO 2 @Ag Nanocomposite for Investigating Metal-Enhanced Fluorescence and Surface-Enhanced Raman Spectroscopy

SiO @Ag nanocomposite (NC) has been synthesized by the chemical reduction and Stӧber method for Metal-enhanced fluorescence (MEF) of Rhodmine 6G (R6G) and Surface-enhanced Raman spectroscopy (SERS) of Malachite green (MG). As-synthesized SiO @Ag NC indicated SiO nanosphere (NS) and Ag nanoparticle (...

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Bibliographic Details
Published inJournal of fluorescence
Main Authors Thai, Dang Van, Pham, Van Ben, Sai, Cong Doanh, Nguyen, Thi Huong Giang, Tran, Trong Duc, Tran, Thi Ha, Nguyen, Tien-Thanh, Nguyen, Tien Dai, Bui, Hong Van
Format Journal Article
LanguageEnglish
Published Netherlands 27.01.2024
Subjects
SERS
Nanocomposite
Enhancement factor
Rhodamine 6G
SiO2@Ag
Malachite green
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Summary:SiO @Ag nanocomposite (NC) has been synthesized by the chemical reduction and Stӧber method for Metal-enhanced fluorescence (MEF) of Rhodmine 6G (R6G) and Surface-enhanced Raman spectroscopy (SERS) of Malachite green (MG). As-synthesized SiO @Ag NC indicated SiO nanosphere (NS) and Ag nanoparticle (NP) morphologies. The SiO @Ag NC was high quality with a well-defined crystallite phase with average sizes of 24 nm and 132 nm for Ag NP and SiO NC, respectively. By using SiO @Ag NC, the photoluminescence (PL) intensity of the R6G (at 59.17 ppm) was increased approximately 133 times. The SERS of the MG (at 1.0 ppm) with SiO @Ag NC as substrate clearly observed vibrational modes in MG dye at 798, 916, 1172, 1394, and 1616 cm . As a result, the SERS enhancement factor (EF ) at 1172 cm obtained 6.3 × 10 . This initial study points to the potential of SiO @Ag NC as a promising material for MEF and SERS substrates to detect dyes at low concentrations.
ISSN:1573-4994