Conductance of single 1,4-disubstituted benzene molecules anchored to Pt electrodes
Conductance of single 1,4-disubstituted benzene molecules anchored to Pt electrodes
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DOI：
10.1063/1.2757592
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发表时间：
2007-07-30
影响因子：
4
通讯作者：
Murakoshi, Kei
中科院分区：
文献类型：
--
作者：
Kiguchi, Manabu;Miura, Shinichi;Murakoshi, Kei
作者研究了锚定在两个Pt电极上的1,4-二取代异氰酸酯（-NC）或硫醇（-SH）苯分子的电导。用Pt电极制备了具有明确电导值的单分子结(类似于3 × 10(-2)G(0)， G（0)=2e(2)/h）。分子结的电导比先前记录的使用Au电极的值高一个数量级。这些观察结果可以用接触金属原子在费米能级上的局部态密度的差异以及分子轨道和金属轨道之间的杂化和能量差的程度来解释。通过统计分析分子连接处的拉伸长度，进一步了解了金属锚定基团键的结合强度。(c) 2007年美国物理学会。
The authors have studied the conductance of a 1,4-disubstituted isocyanide(-NC) or thiol(-SH) benzene molecule anchored to two Pt electrodes. A single molecular junction showing a well-defined conductance value (similar to 3x10(-2)G(0), G(0)=2e(2)/h) was fabricated with the Pt electrodes. The conductance of the molecular junction was one order higher than the previously documented value using Au electrodes. These observations could be explained by differences in the local density of states of the contact metal atom at the Fermi level and the extent of the hybridization and energy difference between the molecular and metal orbitals. Further insight into the binding strengths of the metal-anchoring group bond was obtained by statistically analyzing the stretching length of the molecular junction. (c) 2007 American Institute of Physics.