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The conjugated oligoelectrolyte DSSN+ enables exceptional coulombic efficiency via direct electron transfer for anode-respiring Shewanella oneidensis MR-1-a mechanistic study.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Kirchhofer, Nathan D. Chen, Xiaofen Marsili, Enrico Sumner, James J. Dahlquist, Frederick W. Bazan, Guillermo C. |
| Copyright Year | 2014 |
| Abstract | Shewanella oneidensis MR-1 was cultivated on lactate with poised graphite electrode acceptors (E = +0.2 V vs. Ag/AgCl) in order to explore the basis for sustained increases in anodic current output following the addition of the lipid-intercalating conjugated oligoelectrolyte (COE), 4,4'-bis(4'-(N,N-bis(6''-(N,N,N-trimethylammonium)hexyl)amino)-styryl)stilbene tetraiodide (DSSN+). Microbial cultures, which were spiked with DSSN+, exhibit a ∼2.2-fold increase in charge collected, a ∼3.1-fold increase in electrode colonization by S. oneidensis, and a ∼1.7-fold increase in coulombic efficiency from 51 ± 10% to an exceptional 84 ± 7% without obvious toxicity effects. Direct microbial biofilm voltammetry reveals that DSSN+ rapidly and sustainably increases cytochrome-based direct electron transfer and subsequently increases flavin-based mediated electron transfer. Control experiments indicate that DSSN+ does not contribute to the current in the absence of bacteria. |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/c4cp03197k |
| PubMed reference number | 25171764 |
| Journal | Medline |
| Volume Number | 16 |
| Issue Number | 38 |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/cp/c4/c4cp03197k/c4cp03197k1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/c4cp03197k |
| Journal | Physical chemistry chemical physics : PCCP |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
