Fabrication of carbon nanotube nanogap electrodes by helium ion sputtering for molecular contacts
Fabrication of carbon nanotube nanogap electrodes by helium ion sputtering for molecular contacts
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DOI：
10.1063/1.4868097
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发表时间：
2014-03
影响因子：
4
通讯作者：
C. Thiele;H. Vieker;A. Beyer;B. Flavel;F. Hennrich;David Muñoz Torres;T. Eaton;M. Mayor;M. Kappes;A. Gölzhäuser;H. Löhneysen;R. Krupke
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文献类型：
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作者：
C. Thiele;H. Vieker;A. Beyer;B. Flavel;F. Hennrich;David Muñoz Torres;T. Eaton;M. Mayor;M. Kappes;A. Gölzhäuser;H. Löhneysen;R. Krupke
碳纳米管纳米隙已被用于接触单个有机分子。然而，可靠地制造真正的纳米尺寸的间隙仍然是一个挑战。我们使用氦离子束光刻技术将仅（2.8±0.6）nm尺寸的纳米隙溅射到嵌入器件几何结构中的单金属碳纳米管中。纳米间隙尺寸形成的高再现性为接触小有机分子提供了可靠的纳米间隙电极测试平台。为了证明这些纳米间隙电极的功能，我们整合了低聚（苯乙烯-乙炔）分子棒，并测量了间隙形成前后以及有和没有接触分子的电阻。
Carbon nanotube nanogaps have been used to contact individual organic molecules. However, the reliable fabrication of a truly nanometer-sized gap remains a challenge. We use helium ion beam lithography to sputter nanogaps of only (2.8 ± 0.6) nm size into single metallic carbon nanotubes embedded in a device geometry. The high reproducibility of the gap size formation provides a reliable nanogap electrode testbed for contacting small organic molecules. To demonstrate the functionality of these nanogap electrodes, we integrate oligo(phenylene ethynylene) molecular rods, and measure resistance before and after gap formation and with and without contacted molecules.