Unraveling the Interfacial Electron Transfer Dynamics of Electroactive Microbial Biofilms Using Surface-Enhanced Raman Spectroscopy

H.K. Ly, F. Harnisch, S.F. Hong, U. Schroeder, P. Hildebrandt, D. Millo

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The electron transfer (ET) processes of electroactive microbial biofilms have been investigated by combining electrochemistry and time-resolved surface-enhanced resonance Raman (TR-SERR) spectroscopy. This experimental approach provides selective information on the ET process across the biofilm-electrode interface by monitoring the redox-state changes of heme cofactors in outer membrane cytochromes (OMCs) that are in close vicinity (i.e., within 7nm) to the Ag working electrode. The rate constant for heterogeneous ET of the surface-confined OMCs (sc-OMCs) of a mixed culture derived electroactive microbial biofilm has been determined to be 0.03s
Original languageEnglish
Pages (from-to)487-492
JournalChemSusChem
Volume6
Issue number3
DOIs
Publication statusPublished - 2013

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