化学
氧化还原
电导
生物电子学
电子传输链
共振(粒子物理)
化学物理
生物物理学
生物化学
无机化学
原子物理学
生物传感器
物理
生物
数学
组合数学
作者
Bintian Zhang,Weisi Song,J.M. Brown,R. J. Nemanich,Stuart Lindsay
摘要
Bioelectronics research has mainly focused on redox-active proteins because of their role in biological charge transport. In these proteins, electronic conductance is a maximum when electrons are injected at the known redox potential of the protein. It has been shown recently that many non-redox-active proteins are good electronic conductors, though the mechanism of conduction is not yet understood. Here, we report single-molecule measurements of the conductance of three non-redox-active proteins, maintained under potential control in solution, as a function of electron injection energy. All three proteins show a conductance resonance at a potential ∼0.7 V removed from the nearest oxidation potential of their constituent amino acids. If this shift reflects a reduction of reorganization energy in the interior of the protein, it would account for the long-range conductance observed when carriers are injected into the interior of a protein.
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