Inter-aromatic distances in Geobacter sulfurreducens pili relevant to biofilm charge transport

Geobacter sulfurreducens pili are ­implicated in facilitating electron transfer to electrode surfaces. Comparisons are made between the conductivity of pili and that of doped organic semi­conductors, invoking mechanisms such as “electron hopping” or “metallic conduction”. Ana­lysis of inter-aromatic distances in these pili models shows that charge-carrier transport involving only the π-conjugated system of GS pili is negligible.

H. Yan, C. Chuang, A. Zhugayevych, S. Tretiak, F. W. Dahlquist, and G. C. Bazan
Advanced Materials
Volume: 27
Number: 11
Pages: 1908–1911
Date: March, 2015
ICB Affiliated Authors: Frederick W Dahlquist, Guillermo C Bazan