American Journal of Applied Sciences

Eco-Friendly Synthesis of Fucoidan-Stabilized Gold Nanoparticles

Suwicha Soisuwan, Warangkana Warisnoicharoen, Kriengsak Lirdprapamongkol and Jisnuson Svasti

DOI : 10.3844/ajassp.2010.1038.1042

American Journal of Applied Sciences

Volume 7, Issue 8

Pages 1038-1042

Abstract

Problem statement: Metallic gold nanoparticles (AuNPs) are widely used in many applications including medical, pharmaceutical, diagnostics and sensors. The chemical synthesis of AuNPs normally requires synthetic materials which might cause the toxicological concerns. The use of naturally occurring materials like fucoidans for successful synthesis of AuNPs is of interests. Approach: Fucoidans as sulfated polysaccharides from marine algae Cladosiphon okamuranus (o-fucoidan) and Kjellamaniella crassifolia (t-fucoidan) were used for synthesis of AuNPs. The suitable condition for the synthesis was investigated to obtain the nanometric size of AuNPs. The synthesized AuNPs were characterized for the size, morphology and Surface Plasmon Resonance (SPR). Results: The fucoidan-stabilized AuNPs containing optimum weight ratio of gold atom to fucoidan yielded the spherical sizes with an average of 8-10 nm and the absorption maxima of SPR band around 527-530 nm. The AuNPs stabilized by o-fucoidan structured as linear polymer were more monodisperse than those stabilized by t-fucoidan structured as branched polymer. Conclusion: Fucoidan can be employed solely for AuNP synthesis and the sulfate constituent in fucoidan is important for gold reduction and stabilization. The simple yet eco-friendly synthesis of AuNPs stabilized by fucoidans would be attractive for application use of metallic nanoparticles.

Copyright

© 2010 Suwicha Soisuwan, Warangkana Warisnoicharoen, Kriengsak Lirdprapamongkol and Jisnuson Svasti. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.