Importance of Moisture Control in Formation of Nanogap Electrodes by Electrical Break Junction Method

Importance of Moisture Control in Formation of Nanogap Electrodes by Electrical Break Junction Method
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水分控制在电断结法形成纳米间隙电极中的重要性

DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
K. Hirakawa
K. Hirakawa
中科院分区：
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文献类型：
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作者：
Kenji Yoshida;A. Umeno;S. Sakata;K. Hirakawa

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我们系统地研究了在各种环境条件下通过电断结（EBJ）方法制造镍纳米间隙电极。当在大气中进行EBJ时，Ni电极的阳极侧被严重损坏。通过俄歇电子能谱对受损区域进行了分析，并确定其为 EBJ 工艺过程中通过吸附在金属表面的大气中的水分进行阳极氧化而形成的 Ni 氧化物。当 EBJ 工艺在真空环境中进行时，即使在室温下也可以重复制造具有原子级间距的纳米间隙电极。
We have systematically investigated the fabrication of nanogap electrodes of Ni by the electrical break junction (EBJ) method under various environmental conditions. When EBJ was performed in the atmosphere, the anode side of the Ni electrodes was seriously damaged. The damaged region was analyzed by Auger electron spectroscopy and was identified to be Ni oxides formed during EBJ process by anodic oxidation via atmospherically-derived moisture adsorbed on the metal surfaces. When the EBJ process was performed in an evacuated environment, nanogap electrodes with atomic-order spacing were reproducibly fabricated even at room temperature.