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The Morphological Evolution of Self-Assembled Silver Nanoparticles under Photoirradiation and Their SERS Performance
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Document Title
The Morphological Evolution of Self-Assembled Silver Nanoparticles under Photoirradiation and Their SERS Performance
Author
Phetsahai A. Eiamchai P. Thamaphat K. Limsuwan P.
Affiliations
Green Synthesis and Application Laboratory Applied Science and Engineering for Social Solution Research Unit Department of Physics Faculty of Science King Mongkut抯 University of Technology Thonburi Bangkok 10140 Thailand; Opto-Electrochemical Sensing Research Team National Electronics and Computer Technology Center (NECTEC) National Science and Technology Development Agency (NSTDA) Pathum Thani 12120 Thailand
Type
Article
Source Title
Processes
ISSN
22279717
Year
2023
Volume
11
Issue
7
Open Access
All Open Access Gold
Publisher
Multidisciplinary Digital Publishing Institute (MDPI)
DOI
10.3390/pr11072207
Abstract
In this study we conducted a one-step photochemical synthesis to produce silver nanoparticles (AgNPs) with irregular morphology. The synthesis process involved the photoconversion of Ag nanoseeds into self-assembled Ag nanostructures of various morphologies using a high-pressure sodium lamp with a wavelength of 589 nm corresponding to an energy of 2.1 eV. During the synthesis the color of the colloidal Ag nanoseeds gradually changed as the irradiation time increased transitioning from yellow to brown juniper green basil green ocean green aegean blue and finally to true blue. We characterized the morphological evolution of the resulting AgNPs as well as their optical properties and aggregation behavior using transmission electron microscopy UV-vis spectroscopy and dynamic light scattering. Furthermore we evaluated the impact of the self-assembled morphology of the AgNPs on their surface-enhanced Raman scattering efficiency using R6G as the target analyte. The results revealed that the colloidal AgNPs synthesized under a visible light irradiation time of 1 h consisted of circular nanoplates hexagonal nanoplates trapezoid nanoplates and triangular nanoplates. These colloidal AgNPs exhibited excellent SERS activity when used as an SERS-active substrate in the form of an aqueous solution enabling the detection of low concentrations of R6G down to 10?12 M. ? 2023 by the authors.
Industrial Classification
Knowledge Taxonomy Level 1
Knowledge Taxonomy Level 2
Knowledge Taxonomy Level 3
License
CC BY
Rights
Authors
Publication Source
WOS