Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-12-27
Appl. Phys. Lett. 96, 023106 (2010)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
12 pages,3 figures. to appear in APL
Scientific paper
10.1063/1.3291110
We demonstrate the fabrication of graphene nanogap with crystallographically matching edges on SiO2Si substrates by divulsion. The current-voltage measurement is then performed in a high-vacuum chamber for a graphene nanogap with few hundred nanometers separation. The parallel edges help to build uniform electrical field and allow us to perform electron emission study on individual graphene. It was found that current-voltage characteristics are governed by the space-charge-limited flow of current at low biases while the FN model fits the I-V curves in high voltage regime. We also examined electrostatic gating effect of the vacuum electronic device. Graphene nanogap with atomically parallel edges may open up opportunities for both fundamental and applied research of vacuum nanoelectronics.
Guo Z. B.
Qiu Jianwei
Shen Zhi-Xun
Wang Hai-Min
Wang Yadong
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