Electron transport through single phenylene-ethynylene molecular junctions at low temperature

被引：60

作者：

Khondaker, SI ^{[1
]}

Yao, Z

Cheng, L

Henderson, JC

Yao, YX

Tour, JM

机构：

[1] Univ Texas, Dept Phys, Ctr Nano & Mol Sci & Technol, Austin, TX 78712 USA

[2] Univ Texas, Texas Mat Inst, Austin, TX 78712 USA

[3] Rice Univ, Dept Chem, Houston, TX 77005 USA

[4] Rice Univ, Ctr Nanoscale Sci & Technol, Houston, TX 77005 USA

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 04期

关键词：

D O I：

10.1063/1.1773915

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present low-temperature electron transport measurements of individual phenylene-ethynylene molecular wires, connected to nanometer-spaced gold electrodes. Low-bias current-voltage (I-V) characteristics measured at 4.2 K are stable and show irregular steps. After application of a large voltage, the low-bias I-V curves switch between different stable configurations, some of which show negative differential resistance (NDR). Similar behavior, including the NDR, has been observed in molecules irrespective of whether they contain a NO2 side group or not. We suggest that different I-V curves measured, including the NDR, could be due either to conformational changes in the molecules or a change in coupling of the molecular junction. (C) 2004 American Institute of Physics.

引用

页码：645 / 647

页数：3

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