Silver Nanoparticles-based Optoelectronic Tongue for Detection and Classification of Asinphosmethyl and Thiometon Pesticides
Paper ID : 1176-ICNS
Marjan Koushkestani1, Samira Abbasi-Moayed1, Forough Ghasemi *2, Mohammad Reza Hormozi Nezhad3
1Chemistry Department, Sharif University of Technology, Tehran, 11155-9516, Iran
2Department of Nanotechnology, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research, Education, and Extension Organization (AREEO), Karaj, 3135933151, Iran
3Department of Chemistry, Sharif University of Technology, Tehran 11155-9516, Iran‎
There is a growing interest in developing high-performance sensors monitoring pesticides, due to their broad usage and their adverse effects on humans and wildlife. This paper presents a simple, sensitive and reliable strategy based colorimetric sensor array for simultaneous identification of Azinphosmethyl (APM) and Thiometon (TM) pesticides using silver nanoparticles (AgNPs) with a different surface coating including citrate capped AgNPs and NaBH4 capped AgNPs. These pesticides induce the aggregation of AgNPs which served as the colorimetric response. As a result of aggregation, the color and UV-Vis spectra of AgNPs changed differentially, leading to distinct response patterns for AM and TM. The aggregation induced spectral changes of AgNPs in the presence of these two OPs which are used all together in one fruit has been analyzed with linear discriminant analysis (LDA) as a supervised pattern recognition methods. Finally the applicability of the proposed sensor array will be evaluated by identifying the target pesticides in real samples.
“Sensor array”, “Silver nanoparticles”, “Organophosphate pesticides”
Status : Abstract Accepted (Poster Presentation)