In Situ Spectroelectrochemical Investigation of Electrocatalytic Microbial Biofilms by Surface-Enhanced Resonance Raman Spectroscopy

Authors

  • Dr. Diego Millo,

    Corresponding author
    1. Institut für Chemie, Sekr. PC14, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin (Germany), Fax: (+49) 30-3142-1122
    • Institut für Chemie, Sekr. PC14, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin (Germany), Fax: (+49) 30-3142-1122
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  • Dr. Falk Harnisch,

    Corresponding author
    1. Institute of Environmental and Sustainable Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig (Germany), Fax: (+49) 531-391-8424
    • Institute of Environmental and Sustainable Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig (Germany), Fax: (+49) 531-391-8424
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  • Sunil A. Patil,

    1. Institute of Environmental and Sustainable Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig (Germany), Fax: (+49) 531-391-8424
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  • Hoang K. Ly,

    1. Institut für Chemie, Sekr. PC14, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin (Germany), Fax: (+49) 30-3142-1122
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  • Prof. Dr. Uwe Schröder,

    1. Institute of Environmental and Sustainable Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig (Germany), Fax: (+49) 531-391-8424
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  • Prof. Dr. Peter Hildebrandt

    1. Institut für Chemie, Sekr. PC14, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin (Germany), Fax: (+49) 30-3142-1122
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  • We are very grateful to Prof. Carlos Salgueiro for critical reading of the manuscript, and for financial support by the Alexander von Humboldt Foundation (D.M.), Fonds der Chemischen Industrie (F.H.), the foundation of the Professorship Sustainable Chemistry, Energy Research by Volkswagen AG and the Verband der Deutschen Biokraftstoffindustrie (U.S.), the DFG, and the Cluster of Excellence “UniCat” (P.H.).

Abstract

original image

A mixed-culture-derived microbial biofilm, grown on silver electrodes, was studied in vivo with surface-enhanced resonance Raman scattering (SERRS) in combination with cyclic voltammetry. This experimental approach provides unprecedented structural information about the outer membrane cytochromes involved in the direct electron transfer across the bacterium–electrode interface.

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