期刊
NANO LETTERS
卷 12, 期 9, 页码 4734-4737出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl302171z
关键词
Graphene; nanogap; nanoribbon; on-wire lithography; silicon nanostructure
类别
资金
- DoD/NSSEFF/NPS [N00244-09-1-0012, N00244-09-1-0071]
- AOARD [FA2386-10-1-4065]
- Department of the Navy ONR [N00014-11-1-0729]
- AFOSR [FA9550-09-1-0294]
- Non-equilibrium Energy Research Center (NERC), an Energy Frontier Research Center
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0000989]
- Northwestern University's International Institute for Nanotechnology
We report a simple and highly efficient method for creating graphene nanostructures with gaps that can be controlled on the sub-10 nm length scale by utilizing etch masks comprised of electrochemically synthesized multisegmented metal nanowires. This method involves depositing striped nanowires with Au and Ni segments on a graphene-coated substrate, chemically etching the Ni segments, and using a reactive ion etch to remove the graphene not protected by the remaining Au segments. Graphene nanoribbons with gaps as small as 6 nm are fabricated and characterized with atomic force microscopy, scanning electron microscopy, and Raman spectroscopy. The high level of control afforded by electrochemical synthesis of the nanowires allows us to specify the dimensions of the nanoribbon, as well as the number, location, and size of nanogaps within the nanoribbon. In addition, the generality of this technique is demonstrated by creating silicon nanostructures with nanogaps.
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