title: Synthesis of gold nanoparticles: an ecofriendly approach using Hansenula anomala.
abstract: This work describes a bioassisted approach for the preparation of metal nanoparticles using yeast species Hansenula anomala. Gold nanoparticles were prepared using gold salt as the precursor, amine-terminated polyamidoamine dendrimer as the stabilizer, and the extracellular material from H. anomala as the bioreductant. It could also be demonstrated that, using our approach, small molecules such as cysteine can act as stabilizers as well. This synthetic approach offers a greener alternative route to the preparation of gold sols that are devoid of cellular and toxic chemical components. The ability of as-synthesized gold sol to function as biological ink for producing patterns for the analysis of fingerprints and to act as an antimicrobial reagent is evaluated. The generality of this toxin-free synthetic approach to other metals was assessed using palladium and silver.
authors.affiliation: Electrodics and Electrocatalysis Division, Central Electro-Chemical Research Institute, Council of Scientific and Industrial Research, Karaikudi 630006, India.
authors.forename: Sathish Kumar
authors.initials: SK
authors.lastname: K
authors.forename: Amutha
authors.initials: A
authors.lastname: R
authors.forename: Palaniappan
authors.initials: P
authors.lastname: Arumugam
authors.forename: Sheela
authors.initials: S
authors.lastname: Berchmans
mesh_terms: D000900:Anti-Bacterial Agents / Q000378:metabolism / Q000494:pharmacology; D001709:Biotechnology / Q000379:methods*; D006046:Gold / Q000378:metabolism* / Q000494:pharmacology; D053768:Metal Nanoparticles; D036103:Nanotechnology / Q000379:methods*; D010843:Pichia / Q000378:metabolism*
chemical_list: D000900:Anti-Bacterial Agents; D006046:Gold