Lengke Maggy F, Fleet Michael E, Southam Gordon
Department of Earth Sciences, University of Western Ontario, London, Ontario N6A 5B7, Canada.
Langmuir. 2006 Mar 14;22(6):2780-7. doi: 10.1021/la052652c.
Plectonema boryanum UTEX 485, a filamentous cyanobacterium, has been reacted with aqueous Au(S(2)O(3))(2)(3)(-) and AuCl(4)(-) solutions ( approximately 400-550 mg/L Au) at 25-100 degrees C for up to 1 month and at 200 degrees C for 1 day. The interaction of cyanobacteria with aqueous Au(S(2)O(3))(2)(3)(-) promoted the precipitation of cubic (100) gold nanoparticles (<10-25 nm) at membrane vesicles and admixed with gold sulfide within cells and encrusted on the cyanobacteria, whereas reaction with AuCl(4)(-) resulted in the precipitation of octahedral (111) gold platelets ( approximately 1-10 microm) in solutions and nanoparticles of gold (<10 nm) within bacterial cells. Functional groups imaged by negative ion TOF-SIMS on (111) faces of the octahedral platelets were predominantly Cl and CN, with smaller amounts of C(2)H and CNO.
颤藻（Plectonema boryanum UTEX 485），一种丝状蓝细菌，已与浓度约为400 - 550 mg/L金的硫代硫酸金（Au(S₂O₃)₂³⁻）和氯金酸（AuCl₄⁻）水溶液在25 - 100℃下反应长达1个月，以及在200℃下反应1天。蓝细菌与硫代硫酸金（Au(S₂O₃)₂³⁻）水溶液的相互作用促使立方（100）金纳米颗粒（<10 - 25 nm）在膜泡处沉淀，并与细胞内的硫化金混合且包裹在蓝细菌表面，而与氯金酸（AuCl₄⁻）反应则导致八面体（111）金片（约1 - 10微米）在溶液中沉淀以及细菌细胞内出现金纳米颗粒（<10 nm）。通过负离子飞行时间二次离子质谱（negative ion TOF-SIMS）成像的八面体金片（111）面上的官能团主要是Cl和CN，还有少量的C₂H和CNO。
