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MOF@Ag/AAB/Au@Ag composite matrix full-dimensional divergence effect-based SERS paper sensor for rapid carbaryl

Yujie Pan1, Peini Zhao1, Weili Cai1

  • 1School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.

Food Chemistry
|January 21, 2025
PubMed
Summary

A novel SERS sensor on biodegradable paper detects carbaryl pesticide residues. This sensor offers rapid, accurate on-site screening of carbaryl in food, protecting ecosystems and human health.

Keywords:
3D platformFlexible paper chipFull-dimensional divergence enhancementMetal-organic frameworksSurface-enhanced Raman spectroscopy

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Area of Science:

  • Environmental Science
  • Analytical Chemistry
  • Materials Science

Background:

  • Carbaryl, a broad-spectrum carbamate fungicide, poses risks to ecosystems and human health due to excessive application.
  • Development of sensitive and selective detection methods is crucial for monitoring carbaryl contamination.

Purpose of the Study:

  • To construct a full-dimensional divergence effect Surface-Enhanced Raman Spectroscopy (SERS) sensor for rapid and accurate on-site detection of carbaryl.
  • To develop a cost-effective and environmentally friendly sensor using biodegradable materials.

Main Methods:

  • Fabrication of a SERS sensor on biodegradable paper chips using ZIF-8, a silver layer, artificial antibodies (AABs), and gold-silver core-shell nanoparticles (Au@Ag CSNPs).
  • In situ growth of ZIF-8 on carbon paper, followed by silver coating and AAB polymerization.
  • Decoration with Au@Ag CSNPs to create abundant "hot spots" for enhanced plasmon resonance.

Main Results:

  • The SERS sensor demonstrated superior plasmon resonance in gap and tip regions, enabling sensitive carbaryl detection.
  • Achieved a wide detection range of 0.01–20 μg·mL⁻¹ for carbaryl.
  • Obtained a low limit of detection of 5.72 × 10⁻³ μg·mL⁻¹.

Conclusions:

  • The proposed SERS sensor provides a rapid and accurate method for on-site screening and localization of carbaryl in food.
  • The sensor's design, utilizing multiple functional layers on a biodegradable substrate, offers a promising approach for pesticide residue analysis.