Engineering gold nanoparticles aggregation in acrylate hydrogel-photopolymers for SERS-based on-site highly sensitive dimethoate detection on olives

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dc.authorid0000-0002-3696-8465
dc.authorid0000-0002-8746-833X
dc.authorid0000-0001-6654-1043
dc.contributor.authorYilmaz, Deniz
dc.contributor.authorMiranda, Bruno
dc.contributor.authorNocerino, Valeria
dc.contributor.authorEsposito, Alessandro
dc.contributor.authorRea, Ilaria
dc.contributor.authorLonardo, Enza
dc.contributor.authorDe Luca, Anna Chiara
dc.date.accessioned2026-04-04T18:55:29Z
dc.date.available2026-04-04T18:55:29Z
dc.date.issued2025
dc.departmentİstanbul Bilgi Üniversitesi
dc.description.abstractHydrogel-based flexible plasmonic devices represent a cutting-edge technology for real-time monitoring of food safety, particularly for pesticide detection. This study presents a cost-effective, portable, and sensitive method to detect dimethoate (DMT), a hazardous organophosphorus pesticide, at concentrations below the maximum residue limit (MRL) of 0.01 ppm on olives. By integrating surface-enhanced Raman scattering (SERS) with gold nanoparticles (AuNPs) embedded in polyethylene glycol diacrylate (PEGDA) hydrogels, detection at parts-per-billion (ppb) levels is achieved. The hydrogel matrix enhances sensitivity and reproducibility by forming AuNP dimers, whose concentration increases with DMT levels, boosting signal output. The system uses UV polymerization of a pre-polymer solution, enabling direct application onto olive surfaces and achieving a detection limit of 3 ppb with a signal enhancement of similar to 10(6). Tests with fungicides (RidoMil, Glyphosate) confirmed excellent selectivity for DMT. Validated on-site with a portable Raman spectrometer, this method is adaptable for detecting sulfur-containing pesticides, offering a practical solution for food safety.
dc.description.sponsorshipNextGenerationEU Project PNRR-SEE LIFE-Strengthening the Italian Infrastructure of Euro-Bioimaging [CUPB53C22001810006, PNRR-SEE LIFE, IR00023-D.D. MUR 3264/21, M4C2 Inv 3.1]
dc.description.sponsorshipWe gratefully acknowledge the CNOS Micro and Nano-Fabrication Facility in Benevento for providing access to the portable Raman spec-trometer, which was instrumental in our research. We also extend our thanks to the Euro-Bioimaging facility at IEOMI-CNR for granting us access to the microscopes used for sample characterization. This work is partially supported by the NextGenerationEU Project PNRR-SEE LIFE -Strengthening the Italian Infrastructure of Euro-Bioimaging (IR00023-D.D. MUR 3264/21, M4C2 Inv 3.1, CUPB53C22001810006) .
dc.identifier.doi10.1016/j.foodchem.2025.145890
dc.identifier.doi10.1016/j.foodchem.2025.145890
dc.identifier.issn0308-8146
dc.identifier.issn1873-7072
dc.identifier.pmid40876172
dc.identifier.scopus2-s2.0-105015041530
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.foodchem.2025.145890
dc.identifier.urihttps://hdl.handle.net/11411/10444
dc.identifier.volume493
dc.identifier.wosWOS:001562090500002
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherElsevier Sci Ltd
dc.relation.ispartofFood Chemistry
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20260402
dc.snmzKA_Scopus_20260402
dc.subjectDimethoate
dc.subjectPesticide
dc.subjectOlive
dc.subjectSers
dc.subjectHydrogel
dc.subjectGold Nanoparticle
dc.subjectOptical Sensors
dc.titleEngineering gold nanoparticles aggregation in acrylate hydrogel-photopolymers for SERS-based on-site highly sensitive dimethoate detection on olives
dc.typeArticle

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