Single-crystalline nanogap electrodes: enhancing the nanowire-breakdown process with a gaseous environment.
Single-crystalline nanogap electrodes: enhancing the nanowire-breakdown process with a gaseous environment.
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DOI：
10.1021/am301441a
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发表时间：
2012-10
影响因子：
9.5
通讯作者：
H. Suga;T. Sumiya;S. Furuta;R. Ueki;Yosuke Miyazawa;T. Nishijima;J. Fujita;K. Tsukagoshi;Tetsuo Shimizu;Y. Naitoh
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文献类型：
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作者：
H. Suga;T. Sumiya;S. Furuta;R. Ueki;Yosuke Miyazawa;T. Nishijima;J. Fujita;K. Tsukagoshi;Tetsuo Shimizu;Y. Naitoh
发展了一种在硅衬底上制备单晶纳米间隙的方法。在不同的气体环境下，电流击穿了Si衬底上的多晶Pt纳米线。使用扫描电子显微镜和透射电子显微镜评估纳米间隙电极的晶体结构。通过在O（2）或H（2）气氛中击穿金属丝，得到了夹在Pt大晶粒之间的纳米间隙电极。这些纳米间隙电极在电子衍射图案中显示出强烈的斑点。衍射图案对应于Pt（111），表明单晶颗粒是在O（2）或H（2）气氛中通过电线击穿过程生长的。具有（111）织构和共格边界的Pt线可以被认为是单分子电子学的理想互连线。制造单晶纳米间隙的简单方法是单分子仪器标准纳米间隙电极的第一步之一，并为未来研究纳米空间中的物理现象打开了大门。
A method for fabricating single-crystalline nanogaps on Si substrates was developed. Polycrystalline Pt nanowires on Si substrates were broken down by current flow under various gaseous environments. The crystal structure of the nanogap electrode was evaluated using scanning electron microscopy and transmission electron microscopy. Nanogap electrodes sandwiched between Pt-large-crystal-grains were obtained by the breakdown of the wire in an O(2) or H(2) atmosphere. These nanogap electrodes show intense spots in the electron diffraction pattern. The diffraction pattern corresponds to Pt (111), indicating that single-crystal grains are grown by the electrical wire breakdown process in an O(2) or H(2) atmosphere. The Pt wires that have (111)-texture and coherent boundaries can be considered ideal as interconnectors for single molecular electronics. The simple method for fabrication of a single-crystalline nanogap is one of the first steps toward standard nanogap electrodes for single molecular instruments and opens the door to future research on physical phenomena in nanospaces.