Green synthesis of silver nanoparticles using Dipteryx alata, a native cerrado species: optical, morphological and colloidal characterizationL. H. S. Oliveira, M. D. S. da Pinto, M. G. dos Santos, and E. C. Lima Universidade Federal do Tocantins – UFT, Palmas, Brazil
E-mail: eltonlima@uft.edu.br Received: 27 January 2026 Accepted: 2 May 2026 Abstract: 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. Keywords: Green nanotechnology; Silver nanoparticles; Colloidal characterization; Phytochemical Full paper is available at www.springerlink.com. DOI: 10.1007/s11696-026-05009-8
Chemical Papers 80 (9) 10345–10353 (2026) |
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