Work

Starch-silver hybrid nanoparticles: A novel antimicrobial agent

Year: 2025

Type: article

Abstract: Starch-silver hybrid nanoparticles were synthesized by a method combining nanoprecipitation and autoclaving. Starch nanoparticles (SNPs) were used as matrix and stabilising agent for the silver nanoparticles (AgNPs) by using native starches from different botanical sources. The hybrid Ag-SNPs were characterized in terms of size, charge, morphology and molecular structure. Quantitative analysis of Ag was also carried out. Spherical SNPs were obtained with all starches with sizes ranging from 82 to 90 nm and neutral charge (zeta potentials around −1 mV). HR-TEM micrographs demonstrated the presence of AgNPs of 5–10 nm. FTIR showed AgNPs encapsulation within the SNPs. The antimicrobial activity of the formulations was demonstrated against Escherichia coli and Staphylococcus aureus both in solid medium by the diffusion method and in microdilution method. Slightly higher antibacterial activity against E. coli was observed. Hybrid amaranth Ag-SNPs with 0.0005 M and 0.001 M of AgNO 3 showed log reductions of 4.21 and 4.35 respectively for S. aureus and bactericide effect against E.coli . Therefore, these hybrid NPs can be considered as sustainable promising nanomaterial with antimicrobial activity.

Source: Colloids and Surfaces A Physicochemical and Engineering Aspects

DOI: 10.1016/j.colsurfa.2025.136797

Authors: Diana Morán, Gracia López-Carballo, Rafael Gavara, Gemma Gutiérrez, María Matos

Institutions: Universidad de Oviedo, Instituto de Agroquímica y Tecnología de Alimentos

Language: English

Topic: Nanoparticles: synthesis and applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Good health and well-being

Open Access status: hybrid

Estimated APC paid: $3,200