Design of Colorimetric Sensor Array Using Silver and Gold Nanoparticles for Detection and Discrimination of Triazole Pesticides
Paper ID : 1189-ICNS
Kimia Kalantari *1, Mohammad Reza Hormozi Nezhad2, Nafiseh Fahimikashani3
1Department of chemistry, Sharif University Of Technology, Tehran, Iran
2Department of Chemistry, Sharif University of Technology, Tehran 11155-9516, Iran‎
3Department of Chemistry, Sharif University of Technology, Tehran, Iran
There is a growing interest in developing high performance sensors monitoring triazole pesticides. Triazole fungicides have been widely used to control fungal diseases on fruits, vegetables, grain crops. Consequently, triazole residues may enter into the food chain through water and soil, causing adverse effects on humans and wildlife. Triazoles are categorized as toxic substances which is attributed to their ability to inhibit enzymes involved in the biosynthesis of steroid hormones. In the present study, a colorimetric sensor array consisting of citrate-capped gold nanoparticle and silver nanoparticle has been proposed for the detection and discrimination of three triazole fungicides namely prothioconazole, propiconazole and tebuconazole based on aggregation of these plasmonic nanoparticles. Aggregation of AuNPs and AgNPs in presence of triazole fungicides at different acidic and basic conditions can be used as highly sensitive naked-eye colorimetric assay for quantifying these fungicides in real applications. The aggregation-induced spectral changes of AuNPs upon OP addition has been analyzed with pattern recognition techniques, linear discriminant analysis (LDA).
colorimetric sensor array; Gold Nanoparticle; Silver nanoparticle; pesticide
Status : Abstract Accepted (Poster Presentation)