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Centrifugation-based separation of triangular silver nanoplates from multi-shaped colloidal silver nanoparticles for fabrication of surface-enhanced Raman-scattering substrates
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Document Title
Centrifugation-based separation of triangular silver nanoplates from multi-shaped colloidal silver nanoparticles for fabrication of surface-enhanced Raman-scattering substrates
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 Thani12120 Thailand
Type
Article
Source Title
Ukrainian Journal of Physical Optics
ISSN
16091833
Year
2023
Volume
24
Issue
4
Page
4046-4059
Open Access
All Open Access Bronze
Publisher
Institute of Physical Optics
DOI
10.3116/16091833/24/4/04046/2023
Abstract
We synthesize and separate triangular silver nanoplates (TSNPs) from a mixture of colloidal silver nanoparticles of different shapes and sizes aiming at fabrication of substrates for a surface-enhanced Raman scattering (SERS). The TSNPs are successfully synthesized via a photochemical process involving Ag nanoseeds. This is confirmed by the UV-visible spectroscopy and transmission electron-microscopy analyses. Centrifugation-based separation techniques are employed to isolate the TSNPs and minimize the other nanoparticle morphologies thus resulting in a good SERS performance. The separated TSNPs manifest a remarkable sensitivity with the detection limit amounting to 10� M in the case of Rhodamine 6G molecules. A linear relationship between the Rhodamine 6G concentration and the Raman-peak intensity demonstrates a great potential of our SERS technique. Hence our study combines a successful synthesis and separation of the TSNPs with demonstration of their efficient SERS performance. The latter offers new possibilities for the ultrasensitive trace-level detection of substances. These findings contribute to the development of reliable SERS measurements and the advance in the field of nanomaterial-based sensing techniques. ? 2023 Institute of Physical Optics. All rights reserved.
License
Copyright
Publication Source
WOS