CAJ | 학술논문

在杂化密度泛函理论的基础上,利用弹性散射格林函数方法研究了烷烃硫醇系列分子的电输运性质,并同实验结果进行了比较. 研究结果表明,在低的外加偏压下,烷烃硫醇分子电流值随着分子链长度的增加而指数减小,其衰减常数约为1.41/CH_2,且衰减常数基本上与外加偏压值的大小无关. 分子末端原子与探针的距离具有较大地自由度,不同的接触距离导致了分子的电流值有较大地差别.
재잡화밀도범함이론적기출상,이용탄성산사격림함수방법연구료완경류순계렬분자적전수운성질,병동실험결과진행료비교. 연구결과표명,재저적외가편압하,완경류순분자전류치수착분자련장도적증가이지수감소,기쇠감상수약위1.41/CH_2,차쇠감상수기본상여외가편압치적대소무관. 분자말단원자여탐침적거리구유교대지자유도,불동적접촉거리도치료분자적전류치유교대지차별.
The elastic- scattering Green's function method is applied to study the electronic transport properties of alkanemonothiol molecules at the hybrid density functional theory level. The numerical results are compared with experimental measurements. The results show that, in the lower voltage regime, the molecular currents decreased exponentially with the molecular length, and the corresponding decay constant is about 1.41/CH_(2. )Furthermore, the decay constant is demonstrated to be almost independent of the external voltage. The distance between the terminal atom and the probe of conduction atomic force microscopy is quite flexible, and the electronic transport properties of molecules are sensitive to the distance.