Publication date: 31st July 2014
Biofilms with transfer capacity of electric charge formed on the surface of metal substrates as anodes in microbial fuel cells, are one of the main components which determine the performance of energy production (1-2). In this work, the formation and evolution of microbial Shewanella algae biofilm on gold electrodes fcc(111) functionalized with self-assembled monolayers of thiol molecules and reticular structure (√3×√3)R300 are reported. We used specifically for this study the following molecules: L-cysteine (a-amino acid), dithiothreitol an strong reducing agent, L-glutathione and nonanethiol. It is observed that the formation and evolution of the biofilm depends drastically on the length of the hydrocarbon chain and the head group of the molecule that forms part of the monolayer, as well as composition and morphology of the substrate.
References
(1) F. A. Alatraktche, Y. Zhang J. Noori, I. Angelidaki. Bioresourse Technology 123 (2012) 177-183.
(2) S. Yang, F. Du, H. Liu. Biomass and Bioenergy (2012) Doi: 10.1016/j.biombioe. 2012.07.007.
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