Direct Extracellular Electron Transfer of the Geobacter sulfurreducens Pili Relevant to Interaromatic Distances
Table 1
Charge transport properties of GS1 and GS2 pilus models and biological experiment values of GS pilus.
Charge carrier
GS1
GS
GS
Hole
Electron
Hole
Electron
Pili
Transfer integral (eV)
1.56 × 10−2
3.25 × 10−2
1.46 × 10−2
2.93 × 10−2
N.A.
Diffusion coefficient (m2·s−1)
6.50 × 10−7
2.81 × 10−6
5.65 × 10−7
2.28 × 10−6
N.A.
Charge mobility (m2·v−1·s−1)
2.53 × 10−5
1.09 × 10−4
2.19 × 10−5
8.86 × 10−5
N.A.
Conductivity (S·m−1)
86.02 × 102
70.73 × 102
18.75a
Conductance (μS)
4.69
3.85
3.40b
aThe biological experimental conductivity of individual GS pili filament preparation obtained in biological experiment [16, 17], where the presence of extracellular in the preparation is under debate [6, 53]. bThe biological experimental conductance of GS pili is measured by a modified method [29].
