Ultra-sensitive, on-site pesticide detection for environmental and food safety monitoring using flexible cellulose nano fiber/Au nanorod@Ag SERS sensor

This paper introduces a highly absorbent and sensitive cellulose nanofiber (CNF)/gold nanorod (GNR)@Ag surface-enhanced Raman scattering (SERS) sensor, fabricated using the vacuum filtration method. By optimizing the Ag thickness in the GNR@Ag core–shell structures and integrating them with CNFs, optimal SERS hotspots were identified using the Raman probe molecule 4-aminothiophenol (4-ATP). To concentrate pesticides extracted from fruit and vegetable surfaces, we utilized the evaporation enrichment effect using hydrophilic CNF and hole-punched hydrophobic polydimethylsiloxane (PDMS). This design leverages the hydrophilic substrate and localized evaporation to create a microfluidic flow that concentrates…

• MO
  Ministry of Trade, Industry and Energy
• KI
  Korea Institute for Advancement of Technology

  Award: P0017307
• NR
  National Research Foundation of Korea

  Award: 2018R1A5A7023490
• AI
  Alberta Innovates

  Award: 222301376
• NS
  Natural Sciences and Engineering Research Council of Canada

  Award: RGPIN-03943-2020