细菌视紫红质纳米器件中的电荷输运和电流涨落
Charge transport and current fluctuations in bacteriorhodopsin based nanodevices
摘要：
我们报告在一个单一的细菌视紫红质蛋白质的电荷传输和电流波动在很宽的范围内施加的电压，包括直接和注射隧穿制度。理论与实验结果的一致性验证了所建立模型的物理可行性。特别是，我们预测一个相当突然的增加，伴随着I-V特性的电流波动的方差。电流变化的大约五个数量级的急剧增加与导致I-V特性急剧增加的低电阻路径的打开相关联。通过数值计算进一步检测到相关概率分布函数的强非高斯行为。
英文摘要：
We report on charge transport and current fluctuations in a single bacteriorhodpsin protein in a wide range of applied voltages covering direct and injection tunnelling regimes. The satisfactory agreement between theory and available experiments validates the physical plausibility of the model developed here. In particular, we predict a rather abrupt increase of the variance of current fluctuations in concomitance with that of the I-V characteristic. The sharp increase, for about five orders of magnitude of current variance is associated with the opening of low resistance paths responsible for the sharp increase of the I-V characteristics. A strong non-Gaussian behavior of the associated probability distribution function is further detected by numerical calculations.
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