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.
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July 2020
Research Article|
July 24 2020
Synthesis and characterization of molybdenum disulfide nanoparticles in Shewanella oneidensis MR-1 biofilms
James D. Rees
;
James D. Rees
a)
1
Darrin Fresh Water Institute, Rensselaer Polytechnic Institute,
110 8th Street, Troy, New York 12180
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Yuri A. Gorby;
Yuri A. Gorby
b)
2
Department of Civil and Environmental Engineering, Rensselaer Polytechnic Institute
, 110 8th Street, Troy, New York 12180
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Shayla M. Sawyer
Shayla M. Sawyer
c)
3
Department of Electrical, Computer and Systems Engineering, Rensselaer Polytechnic Institute
, 110 8th Street, Troy, New York 12180
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a)
Author to whom correspondence should be addressed: dylanrees@protonmail.ch
b)
Electronic mail: ygorby@gmail.com
c)
Electronic mail: sawyes@rpi.edu
Biointerphases 15, 041006 (2020)
Article history
Received:
March 16 2020
Accepted:
July 01 2020
Citation
James D. Rees, Yuri A. Gorby, Shayla M. Sawyer; Synthesis and characterization of molybdenum disulfide nanoparticles in Shewanella oneidensis MR-1 biofilms. Biointerphases 1 July 2020; 15 (4): 041006. https://doi.org/10.1116/6.0000199
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