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Designing A Colorimetric Sensor Array Based on Gold, Silver and Gold-Silver Alloy Nanoparticles for Detection and Discrimination of Pesticides

Kalantari, Kimia | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54157 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Hormozinezhad, Mohammad Reza
  7. Abstract:
  8. Due to the widespread use of pesticides and their harmful effects on humans and wildlife, monitoring their residual amounts in crops is critically essential but still challenging regarding the development of high-throughput approaches. Herein, a colorimetric sensor array has been proposed for discrimination and identification of triazole fungicides using monometallic and bimetallic silver and gold nanoparticles. Aggregation-induced behavior of AgNPs, AuNPs and Au-AgNPs in the presence of four triazole fungicides produced a fingerprint response pattern for each analyte. Pattern recognition methods, including linear discriminant analysis (LDA) and hierarchical cluster analysis, have been employed for the differentiation of triazoles in the concentration range of 0.1-0.55 µg.mL-1. Besides, the sensor array demonstrates promising practicability to satisfactorily distinguished triazole in mixtures and complex media of wheat flour and cucumber samples. The proposed colorimetric sensor array might pave the way towards a low-cost and rapid, yet sensitive platform for high-throughput monitoring of residual amounts of pesticides for on-site applications
  9. Keywords:
  10. Colorimetric Sensor Array ; Gold Nanoparticle ; Silver Nanoparticles ; Triazole ; Alloy Nanoparticles ; Pesticide ; Agricultural Products ; Gold-Silver Alloy Nanoparticle

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