This document discusses the synthesis and characterization of polymers based sensors. It describes: 1) The synthesis of silver nanoparticles conjugated with P(S-VP) polymers using a two-phase system involving methanol, toluene, P(S-VP) solution, AgNO3 solution, and NaBH4 solution. 2) Characterization of the P(S-VP)-conjugated AgNPs using techniques such as UV-visible spectroscopy, atomic force microscopy, zeta sizer, zeta potential, and FTIR. 3) The ability of these nanoparticles to encapsulate and detect pesticides like cartap in water and blood plasma samples, and how temperature, salt concentration, and pH affect the

1. Polymers Based Sensors
Presented By:
Adnan Murad Bhayo
Group Presentation on a topic,

3. • The synthesis of P(S-VP)-AgNPs was accomplished by using a two-phase system consisting of methanol and
toluene. The concentrations of solution of P(S-VP), AgNO3 and NaBH4 were 0.1, 1.0 and 4.0 mM respectively.
• The solutions were mixed in a volume ratio of 1:30:0.1. P(S-VP) solution was added into a stirred aqueous
solution of AgNO3.
• After 15 min, NaBH4 was added into the reaction mixture and stirred for 30 min. Appearance of yellow color was an
indication of the formation of silver nanoparticles (AgNPs)
Synthesis of Nanoparticles

4. UV-visible spectrum of P(S-VP)-conjugated AgNPs
Ag+ + BH4
− + H2O → Ag0 +B(OH)3

5. when cartap is present in the solution, it tends to be attracted towards positive charges on the P2VP block
inside core of micelles because of its resonating structure
Cartap Resonating Structure P2VP
Encapsulation of Cartap (Pesticide)

6. Atomic Force Microscopy (AFM)

7. Zeta Sizer

8. Zeta Potential

9. FTIR

11. Structures of Pesticides

13. Interference

14. Cartap Detection in Water

15. Cartap Detection in Blood Plasma

16. UV-visible spectrum of P(S-VP)-conjugated AgNPs after incubation of P(S-VP)-conjugated AgNPs at 64 °C for
10 minutes (B.P. of methanol)
Temperature Effect

17. Salt Effect

18. pH Effect