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arXiv 0705.0527cond-mat.mes-hall
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调节分子开关的电导

Tuning the conductance of a molecular switch

Miriam del Valle, Rafael Gutierrez, Carlos Tejedor, Gianaurelio Cuniberti

摘要:

控制单分子电导的能力将对纳米级电子学产生重大影响。偶氮苯是一种分子,当暴露于辐射时,由于反式/顺式转变而改变构象,可以形成光驱动分子开关的基础。因此,澄清这种分子的电传输特性至关重要。在这里,我们从理论上研究了一个系统中,其中一个单一的偶氮苯分子连接到两个碳纳米管的电荷输运。与金电极形成鲜明对比的是,纳米管可以作为真正的纳米级电极,我们表明,通过改变纳米管和分子之间的接触的拓扑结构和/或纳米管的手性(即,锯齿形或扶手椅),可以显着地修改结的低能量传导特性。我们提出实验来证明与纳米管电极的控制电气开关。

英文摘要:

The ability to control the conductance of single molecules will have a major impact in nanoscale electronics. Azobenzene, a molecule that changes conformation as a result of a trans/cis transition when exposed to radiation, could form the basis of a light-driven molecular switch. It is therefore crucial to clarify the electrical transport characteristics of this molecule. Here, we investigate theoretically charge transport in a system in which a single azobenzene molecule is attached to two carbon nanotubes. In clear contrast to gold electrodes, the nanotubes can act as true nanoscale electrodes and we show that the low-energy conduction properties of the junction may be dramatically modified by changing the topology of the contacts between the nanotubes and the molecules, and/or the chirality of the nanotubes (that is, zigzag or armchair). We propose experiments to demonstrate controlled electrical switching with nanotube electrodes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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