Zinc Oxide Nanorods Enhance SERS Detection in Environmental Contaminants

Strategic Insights -

Researchers have developed a novel platform for detecting environmental contaminants using zinc oxide nanorods decorated with silver nanoparticles on a Whatman no 1 paper substrate. The functionalized substrate demonstrated superior Surface-Enhanced Raman Scattering (SERS) performance compared to substrates with only silver nanoparticles. The enhanced detection was attributed to the large surface area of zinc oxide nanorods, which facilitated target molecule adsorption and increased interactions with incident light.

Key Takeaways:

  • The zinc oxide nanorod/silver nanoparticle functionalized paper substrate showed superior SERS performance for detecting rhodamine 6G (R6G) dye and the thiabendazole (TBZ) pesticide, with enhancement factors of 2.1 x 10 and 9.8 x 10, respectively.
  • The limits of detection (LOD) for R6G and TBZ were approximately 4.3 x 10 and 5.0 x 10 mol/L, respectively.
  • The substrate demonstrated long-term stability and selectivity for detecting pesticide mixtures, reinforcing its potential for environmental monitoring.
  • The use of zinc oxide nanorods enabled the integration of various nanomaterials, expanding the substrate's potential for applications beyond environmental monitoring.
  • The research has been peer-reviewed and published in ACS Applied Nano Materials.

Statistics:

  • Enhancement factors (EF) for R6G detection: 2.1 x 10 (zinc oxide nanorod/silver nanoparticle substrate) vs. 9.3 x 10 (silver nanoparticle substrate)
  • Limits of detection (LOD) for R6G: approximately 4.3 x 10 mol/L (zinc oxide nanorod/silver nanoparticle substrate)
  • Enhancement factors (EF) for TBZ detection: 9.8 x 10 (zinc oxide nanorod/silver nanoparticle substrate) vs. 2.0 x 10 (silver nanoparticle substrate)
  • Limits of detection (LOD) for TBZ: approximately 5.0 x 10 mol/L (zinc oxide nanorod/silver nanoparticle substrate)

Sources:

  • CENIMAT Reports Findings in Nanorods (ZnO Nanorod/Ag Nanoparticle Functionalized Paper Substrate for Sensitive SERS Detection of Environmental Contaminants). Nanotechnology Weekly. June 9, 2025; p 277.
  • ZnO Nanorod/Ag Nanoparticle Functionalized Paper Substrate for Sensitive SERS Detection of Environmental Contaminants. ACS Applied Nano Materials, 2025;8(20):10434-10447.