Charge Transport Characteristics of Diarylethene Photoswitching Single-Molecule Junctions
Charge Transport Characteristics of Diarylethene Photoswitching Single-Molecule Junctions
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DOI：
10.1021/nl3015523
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发表时间：
2012-07-01
期刊：
影响因子：
10.8
通讯作者：
Scheer, Elke
中科院分区：
文献类型：
--
作者：
Kim, Youngsang;Hellmuth, Thomas J.;Scheer, Elke
我们报告的光开关分子的开放和封闭异构体的单分子结的电荷传输的实验分析。无硫二芳基乙烯分子的开发和研究，通过电气和光学测量以及密度泛函理论计算。在低温下，在机械控制的断开结系统中测量了单分子电导和电流电压特性。与单能级输运模型的结果比较，我们发现了一个意想不到的行为的电流主导的分子轨道异构化。我们表明，侧链和端基的分子是至关重要的理解的光开关分子结的电荷传输机制。
We report on the experimental analysis of the charge transport through single-molecule junctions of the open and closed isomers of photoswitching molecules. Sulfur-free diarylethene molecules are developed and studied via electrical and optical measurements as well as density functional theory calculations. The single-molecule conductance and the current voltage characteristics are measured in a mechanically controlled break-junction system at low temperatures. Comparing the results with the single-level transport model, we find an unexpected behavior of the current-dominating molecular orbital upon isomerization. We show that both the side chains and end groups of the molecules are crucial to understand the charge transport mechanism of photoswitching molecular junctions.