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Langmuir 2006, 22, 2780-2787
Morphology of Gold Nanoparticles Synthesized by Filamentous Cyanobacteria from Gold(I)-Thiosulfate and Gold(III)-Chloride Complexes Maggy F. Lengke,* Michael E. Fleet, and Gordon Southam Department of Earth Sciences, UniVersity of Western Ontario, London, Ontario N6A 5B7, Canada ReceiVed September 29, 2005. In Final Form: January 8, 2006 Plectonema boryanum UTEX 485, a filamentous cyanobacterium, has been reacted with aqueous Au(S2O3)23- and AuCl4- solutions (∼400-550 mg/L Au) at 25-100 °C for up to 1 month and at 200 °C for 1 day. The interaction of cyanobacteria with aqueous Au(S2O3)23- promoted the precipitation of cubic (100) gold nanoparticles (
