Investigation of Nonlinear Optical Properties of AgNPs Synthesized Using Cyclea peltata Leaf Extract Post OVAT Optimization

This paper focuses on the use of Cyclea peltata leaf extract for green synthesis of silver nanoparticles (CPL-AgNPs) post-optimization by one variable at a time (OVAT) approach for nonlinear optics application. The leaf extract of Cyclea peltata (10% w/v) and AgNO3 (1 mM) was used for the synthesis of silver nanoparticles (CPL-AgNPs). Reactions conditions like CPL extract concentration, salt concentration, temperature, pH, RPM, and time for synthesis were optimized by using OVAT approach. A UV-visible spectroscopic investigation confirmed the biosynthesis of CPL-AgNPs at 420 nm. Field emission scanning electron microscope (FESEM) confirmed the spherical monodispersed nanoparticles in the range of 30–50 nm and EDAX confirmed the purity of the sample. FTIR confirmed the capping of nanoparticles by plant phytochemicals. The synthesized CPL-AgNPs were evaluated for nonlinear optical properties using the Z-scan technique at 532 nm with a CW laser. Strong nonlinear absorption by the nanoparticles in the range of 2.85 × 10−2 cm/W was observed. Moreover, CPL-AgNPs display superior optical limitations.