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Paper-based SERS chips for the rapid detection of thiram
Wei Lin1, Zesong Liu1, Jingwen Zhang1
1MOE Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, China.
Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
|February 2, 2025
Summary
Researchers developed a simple method for aggregated silver nanoparticles (a-AgNPs). These nanoparticles enable a convenient paper-based sensor for detecting thiram using surface-enhanced Raman scattering (SERS).
Area of Science:
- Nanotechnology
- Analytical Chemistry
- Materials Science
Background:
- Developing sensitive and portable detection methods is crucial for various analytical applications.
- Silver nanoparticles offer unique optical properties due to localized surface plasmon resonance (LSPR).
- Surface-enhanced Raman scattering (SERS) is a powerful technique for trace molecule detection.
Purpose of the Study:
- To develop a simple, one-pot method for preparing positively charged aggregated silver nanoparticles (a-AgNPs).
- To fabricate paper-based SERS chips using the synthesized a-AgNPs.
- To demonstrate a convenient SERS sensor for detecting thiram.
Main Methods:
- A one-pot synthesis strategy was employed to create positively charged aggregated silver nanoparticles.
- The a-AgNPs were characterized for their optical properties, specifically LSPR absorption.
- Paper-based SERS chips were fabricated by filtering a-AgNPs onto a negatively charged membrane.
- A handheld Raman spectrometer (785 nm) was used for thiram detection.
Main Results:
- The synthesized a-AgNPs exhibited strong LSPR absorption tunable to common SERS laser wavelengths.
- The a-AgNPs were successfully integrated into paper-based SERS chips.
- A convenient SERS sensor was established for the detection of thiram.
Conclusions:
- The developed one-pot method provides a facile route to positively charged aggregated silver nanoparticles.
- The fabricated paper-based SERS chips are effective for sensitive thiram detection.
- This approach offers a promising platform for portable and convenient SERS sensing applications.
