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Science & Technology

Bioelectricity Generation from Carbon Dots-Fed Shewanella Oneidensis MR-1

By 18th March 2020No Comments

The following study was conducted by Scientists from State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, China; Condensed Matter Science and Technology Institute, School of Instrumentation Science and Engineering, Harbin Institute of Technology, China; iNANO Centre, Aarhus University, Aarhus, Denmark; Sino-Danish Centre for Research and Education (SDC), Aarhus, Denmark; Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, USA; CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, China; Center for Electromicrobiology, Aarhus University, Aarhus, Denmark. Study is published in Nature Communications Journal as detailed below.

Nature Communications; Volume 11, Article number: 1379; (2020)

Carbon Dots-Fed Shewanella Oneidensis MR-1 for Bioelectricity Enhancement


Bioelectricity generation, by Shewanella oneidensis (S. oneidensis) MR-1, has become particularly alluring, thanks to its extraordinary prospects for energy production, pollution treatment, and biosynthesis. Attempts to improve its technological output by modification of S. oneidensis MR-1 remains complicated, expensive and inefficient. Herein, we report on the augmentation of S. oneidensis MR-1 with carbon dots (CDs). The CDs-fed cells show accelerated extracellular electron transfer and metabolic rate, with increased intracellular charge, higher adenosine triphosphate level, quicker substrate consumption and more abundant extracellular secretion. Meanwhile, the CDs promote cellular adhesion, electronegativity, and biofilm formation. In bioelectrical systems the CDs-fed cells increase the maximum current value, 7.34 fold, and power output, 6.46 fold. The enhancement efficacy is found to be strongly dependent on the surface charge of the CDs. This work demonstrates a simple, cost-effective and efficient route to improve bioelectricity generation of S. oneidensis MR-1, holding promise in all relevant technologies.


Nature Communications



Yang, C., Aslan, H., Zhang, P. et al. Carbon dots-fed Shewanella oneidensis MR-1 for bioelectricity enhancement. Nat Commun 11, 1379 (2020).