Highly stable Au atomic contacts covered with benzenedithiol in ambient condition
Highly stable Au atomic contacts covered with benzenedithiol in ambient condition
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在环境条件下用苯二硫醇覆盖的高度稳定的金原子触点
DOI：
10.1039/c4cp01950d
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
M. Kiguchi
中科院分区：
文献类型：
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作者：
D. Murai;T. Nakazumi;S. Fujii;Y. Komoto;K. Tsukagoshi;C. Motta;M. Kiguchi
通过测量自破断过程中的电导，研究了Au原子接触在环境条件下的稳定性。自支撑的Au原子接触可以保持超过100秒后，浸泡在1，4-苯二硫醇（BDT）的解决方案。由于用BDT进行金属化学改性，平均寿命，即结在断裂前保持稳定的时间量，从1.5秒增加到12秒。通过比较BDT和苯乙醚覆盖的Au原子接触的寿命，我们发现金属原子接触的稳定性源于从金到分子的电荷转移。本研究结果对制备稳定的金属原子接触具有重要意义，并为在室温下制备稳定的纳米结开辟了新的方向。
The stability of Au atomic contacts under ambient conditions is investigated by measuring the electrical conductance during the self-breaking process. Free standing Au atomic contacts can be kept for more than 100 s after immersion in a 1,4-benzenedithiol (BDT) solution. The average lifetime, that is the amount of time in which the junction remains stable before breaking, is increased from 1.5 s to 12 s due to the metal chemical modification with BDT. By comparing the lifetime of the Au atomic contact covered with BDT and with benzenethiol, we found that the stabilization of the metal atomic contacts stems from the charge transfer from the gold to the molecule. The present results have important implications on the preparation of stable metal atomic contacts and open new directions to fabricate stable nanojunctions at room temperature.