The UV-Vis spectrum (Figure ) displayed absorbance peaks at λmax 352 nm, indicative of CuNPs, which aligns with the findings reported by Wu et al. . In their investigation on the green synthesis of copper nanoparticles using Cissus vitiginea, they observed a broadened SPR peak at λmax 340 nm in the UV-Vis spectrum, confirming the synthesis of polydispersed nanosized particles, a characteristic feature of copper nanoparticles. Similarly, Caroling et al. ,