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<p>Green synthesis provides a sustainable route to metallic nanoparticles using phytochemicals as reducing and capping agents. In this study, silver nanoparticles (AgNPs) were synthesized in aqueous medium with leaf extracts of <i>Dipteryx alata</i> Vogel, a native Brazilian Cerrado species enriched in phenolic and antioxidant metabolites. UV monitored the formation of AgNPs–Vis spectroscopy, which demonstrated rapid nucleation, progressive growth, and a characteristic blue-shift of the surface plasmon resonance band for the 90/10 (AgNO<sub>3</sub>/extract) formulation, denoting the formation of smaller nanoparticles. SEM-FEG imaging confirmed predominantly spherical nanostructures with EDS verifying their Ag-based composition. Dynamic light scattering measurements yielded a multimodal size distribution dominated by nanometric populations (≈18&#xa0;nm), with secondary fractions attributable to limited aggregation and consistent with a moderate zeta potential (≈ − 12&#xa0;mV). Together, the complementary techniques demonstrate that <i>D. alata</i> metabolites facilitate nucleation, growth, and stabilization of AgNPs via a classical phytochemical-mediated mechanism. These findings underscore the bioprospecting potential of Cerrado plant species for eco-friendly nanomaterial deployment and strengthen <i>D. alata</i> as a viable platform for biosensing, catalytic, and antimicrobial applications.</p>

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Green synthesis of silver nanoparticles using Dipteryx alata, a native cerrado species: optical, morphological and colloidal characterization

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月21日

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  • L. H. S. Oliveira,
  • M. D. S. da Pinto,
  • M. G. dos Santos,
  • E. C. Lima

摘要

Green synthesis provides a sustainable route to metallic nanoparticles using phytochemicals as reducing and capping agents. In this study, silver nanoparticles (AgNPs) were synthesized in aqueous medium with leaf extracts of Dipteryx alata Vogel, a native Brazilian Cerrado species enriched in phenolic and antioxidant metabolites. UV monitored the formation of AgNPs–Vis spectroscopy, which demonstrated rapid nucleation, progressive growth, and a characteristic blue-shift of the surface plasmon resonance band for the 90/10 (AgNO3/extract) formulation, denoting the formation of smaller nanoparticles. SEM-FEG imaging confirmed predominantly spherical nanostructures with EDS verifying their Ag-based composition. Dynamic light scattering measurements yielded a multimodal size distribution dominated by nanometric populations (≈18 nm), with secondary fractions attributable to limited aggregation and consistent with a moderate zeta potential (≈ − 12 mV). Together, the complementary techniques demonstrate that D. alata metabolites facilitate nucleation, growth, and stabilization of AgNPs via a classical phytochemical-mediated mechanism. These findings underscore the bioprospecting potential of Cerrado plant species for eco-friendly nanomaterial deployment and strengthen D. alata as a viable platform for biosensing, catalytic, and antimicrobial applications.