Darrin Fresh Water Institute, Rensselaer Polytechnic Institute, 110 8th Street, Troy, New York 12180.
Department of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, New York 12180.
Biointerphases. 2020 Jul 24;15(4):041006. doi: 10.1116/6.0000199.
Shewanella oneidensis MR-1 is a dissimilatory metal-reducing bacterium capable of reducing various metal and sulfur compounds and precipitating them in nanoparticulate form. Here, we report the synthesis of molybdenum disulfide nanomaterials at the site of S. oneidensis biofilms grown in the presence of molybdenum trioxide and sodium thiosulfate. Samples from the growth medium were imaged using scanning electron microscopy and characterized using transmission electron microscopy, energy-dispersive x-ray spectroscopy, absorbance spectroscopy, and x-ray diffraction. These methods revealed the presence of molybdenum disulfide nanoparticle aggregates 50-300 nm in diameter with both hexagonal and rhombohedral polytypes. As a biosynthesis method for molybdenum sulfide, the use of S. oneidensis offers the advantage of significantly reduced heat and chemical solvent input compared to conventional methods of synthesizing molybdenum disulfide nanoparticles.
希瓦氏菌属 MR-1 是一种异化金属还原菌，能够还原各种金属和硫化合物，并将它们以纳米颗粒的形式沉淀出来。在这里，我们报告了在三氧化钼和硫代硫酸钠存在的条件下生长的希瓦氏菌生物膜中合成二硫化钼纳米材料的方法。使用扫描电子显微镜对生长培养基中的样品进行成像，并使用透射电子显微镜、能量色散 X 射线能谱、吸收光谱和 X 射线衍射进行了表征。这些方法揭示了存在直径为 50-300nm 的二硫化钼纳米颗粒聚集体，具有六方和菱面体多型。作为一种硫化钼的生物合成方法，与传统的二硫化钼纳米颗粒合成方法相比，使用希瓦氏菌具有显著降低的热能和化学溶剂输入的优势。
