What does this research mean for the field?

Silver nanoparticles synthesized using Paullinia cupana extract act as multifunctional materials that exhibit diffusion-influenced electrochemical behavior toward deltamethrin and exert concentration-dependent, species-specific effects on seed germination. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

Synthesize silver nanoparticles using Paullinia cupana extract to evaluate their electrochemical behavior toward commercial deltamethrin formulations and measure their biological effects on seed germination.

September 2, 2026Discover Chemistry.Open Access

Green synthesized silver nanoparticles mediated by Paullinia cupana extract exhibit electrochemical behavior toward a commercial deltamethrin formulation and concentration related effects on seed germination

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Authors

JEJardel Ramos da EncarnaçãoUniversidade Federal do Amazonas SFSulcimilena mady floresUniversidade Federal do Amazonas ESEverton Martins da SilvaUniversidade Federal do Amazonas

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Implication

Laboratory study demonstrates electrochemical detection of deltamethrin and dose-dependent phytotoxicity in crop seeds using green silver nanoparticles, suggesting potential multifunctional...

Key Points

Synthesize silver nanoparticles using Paullinia cupana extract to evaluate their electrochemical behavior toward commercial deltamethrin formulations and measure their biological effects on seed germination.
Synthesized silver nanoparticles (AgNPs) via green reduction using aqueous Paullinia cupana extract and immobilized them onto carbon matrices through in situ and ex situ pathways.
Characterized structural and colloidal properties using UV–Vis, XRD, FTIR, TGA, SEM/EDS, TEM, BET, dynamic light scattering, and zeta-potential analysis.
Conducted electrochemical tests with the commercial insecticide Decis 25 EC and assessed germination and root development parameters in gherkin and coriander seeds.
Aqueous AgNP dispersions exhibited a characteristic surface plasmon resonance at 418–420 nm, a mean hydrodynamic diameter of 429.5 ± 14.0 nm, a polydispersity index of 0.229 ± 0.010, and a zeta potential of −10.93 ± 1.56 mV.
Carbon-immobilized AgNPs displayed irreversible cathodic processes in the presence of deltamethrin, exhibiting scan-rate dependencies characteristic of diffusion-influenced electrochemical behavior.
Lower AgNP concentrations preserved germination metrics in both gherkin and coriander, whereas higher concentrations exerted pronounced inhibitory effects, specifically stunting root elongation.

Cite This Study

Encarnação et al. (2026) studied this question.

synapsesocial.com/papers/6a97e29ec562ede874ec6d47 https://doi.org/10.1007/s44371-026-00946-5

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Implication

Laboratory study demonstrates electrochemical detection of deltamethrin and dose-dependent phytotoxicity in crop seeds using green silver nanoparticles, suggesting potential multifunctional...