DNA分子电荷输运的大极化机制探讨

A Study of The Large Polaron Mechanism in Charge Transport in DNA

近年来研究发现,与生命体密切相关的DNA损伤与修复过程伴随着DNA链内电荷的转移.在DNA中,极化子是重要的元激发,是DNA中电荷传递可能的载流子.为了更好的理解DNA的电荷输运的极化子机制,给出了能够准确估计电声耦合常数α数值的理论方法.利用确定的电声耦合常数α,计算了极化子宽度和极化子束缚能.计算结果显示,DNA中的电荷输运是通过大极化子的相干运动来实现的.

Recent studies reveal that damage and repair of DNA are closely related to living organisms are accompanied by charge transfer within DNA strands. The polarons are important elementary excitation in DNA and a potential current carrier in its charge transport. To better understand the polaron mechanism in charge transport in DNA, we theoretically produced numerical methods that can accurately calculate the electron--phonon coupling constant a. Based stant, we calculated the width and the binding energy of polarons. The results reveal that charge transport in chieved through coherent motions by large polarons. on this con DNA was achieved through coherent motions by large polarons.