Brayner Roberta, Barberousse Hélène, Hemadi Miryana, Djedjat Chakib, Yéprémian Claude, Coradin Thibaud, Livage Jacques, Fiévet Fernand, Couté Alain
Interfaces, Traitements, Organisation et Dynamique des Systèmes (ITODYS), UMR-CNRS 7086, Université Paris 7-Denis Diderot, case 7090, 2 place Jussieu, 75251 Paris Cedex 05, France.
J Nanosci Nanotechnol. 2007 Aug;7(8):2696-708. doi: 10.1166/jnn.2007.600.
Common Anabaena, Calothrix, and Leptolyngbya cyanobacteria are shown to form Au, Ag, Pd, and Pt nanoparticles of well-controlled size. These nanoparticles are synthesized intra-cellularly, and naturally released in the culture medium, where they are stabilized by algal polysaccharides, allowing their easy recovery. The size of the recovered particles as well as the reaction yield is shown to depend on the cyanobacteria genus. Investigations of nanoparticle formation indicate that the intracellular nitrogenase enzyme is responsible for the metal reduction but that the cellular environment is involved in the colloid growth process.
常见的鱼腥藻、眉藻和鞘丝藻蓝细菌被证明能形成尺寸可控的金、银、钯和铂纳米颗粒。这些纳米颗粒在细胞内合成，并自然释放到培养基中，在那里它们被藻类多糖稳定，便于回收。回收颗粒的大小以及反应产率显示取决于蓝细菌的属。对纳米颗粒形成的研究表明，细胞内的固氮酶负责金属还原，但细胞环境参与了胶体生长过程。
