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To establish a sustainable synthesis method for stable gold nanoparticles utilizing disulfide cross-linked alginate.

December 12, 2025MoleculesOpen Access

Reductive Synthesis of Stable, Polysaccharide in Situ-Modified Gold Nanoparticles Using Disulfide Cross-Linked Alginate

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Novel synthesis produces stable gold nanoparticles with polysaccharide modification, suggesting applications in biomedicine and catalysis.

To establish a sustainable synthesis method for stable gold nanoparticles utilizing disulfide cross-linked alginate.
Synthesis of gold nanoparticles using a disulfide-crosslinked derivative of alginic acid as reducing agent and stabilizer
Reaction with HAuCl4 in water at room temperature for 10 minutes
Characterization through electron microscopy and X-ray photoelectron spectroscopy
Gold nanoparticles exhibited a surface plasmon resonance peak at 539 nm
Stable colloidal suspension over 14 days
Electron microscopy revealed nanoparticles with a bimodal size distribution (10 nm and 75-100 nm)
Presence of metallic gold confirmed via X-ray photoelectron spectroscopy
Nanoparticles showed a high negative zeta-potential of -53.9 mV due to the polyanionic alginate shell

Parfenova et al. (2025) studied this question.

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Novel synthesis produces stable gold nanoparticles with polysaccharide modification, suggesting applications in biomedicine and catalysis.