Green synthesis of carbon dots-functionalized silver nanoparticles for SERS-based detection of thiram fungicide.
- Resource Type
- Article
- Authors
- Gokulakrishnan, J.; Koppole, Kamakshi; Rugmini, R.; Sekhar, K. C.
- Source
- Applied Physics A: Materials Science & Processing. Nov2023, Vol. 129 Issue 11, p1-10. 10p.
- Subject
- *SILVER nanoparticles
*SERS spectroscopy
*FUNGICIDES
*RAMAN spectroscopy
*ULTRAVIOLET-visible spectroscopy
*STABILIZING agents
- Language
- ISSN
- 0947-8396
This study reports the reduction of AgNO3 using green-synthesized carbon dots (CDs) derived from the leaf extract of Datura metel without the aid of any chemical-reducing agent. The CDs act as both reducing and stabilizing agent to synthesize CDs-functionalized silver nanoparticles (Ag/CDs) and are employed for surface-enhanced Raman spectroscopy (SERS)-based detection of thiram fungicide. The formation of Ag/CDs is confirmed with UV–Vis absorption spectroscopy and Raman spectroscopy. The synthesized Ag/CDs exhibit high stability and the fabricated SERS substrate exhibited a detection range of 10–3 to 10–8 M with a corresponding correlation coefficient of 0.98. The obtained minimum detection limit of thiram is 10–8 M with an enhancement factor of 1.3 × 105 which is much lower than the maximum allowed residual limit of 7 ppm. This study emphasizes the green route to synthesize CDs-functionalized stable AgNPs for the SERS-based detection of thiram fungicide and explained the sensing mechanism. [ABSTRACT FROM AUTHOR]