Journal
ACS NANO
Volume 5, Issue 3, Pages 1975-1983Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn103035y
Keywords
nanofabrication; graphene nanoribbons; catalytic hydrogenation; edge smoothness; low voltage transmission electron microscopy
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Funding
- Alexander von Humboldt foundation
- BMBF
- EPSRC [EP/F048009/1]
- Royal Society
- Glasstone Fund
- Brasenose College
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Nanostructured graphene and graphene nanoribbons have been fabricated by catalytic hydrogenation, and the edge smoothness has been examined via direct imaging with atomic resolution. When abstaining from solvents during sample preparation, the prepared nanoribbons possess dean edges ready for inspection via transmission electron microscopy (TEM). Edges with subnanometer smoothness could be observed. A method has been developed to make catalytic hydrogenation experiments compatible with TEM, which enables Monitoring of the nanoparticles prior to and after hydrogenation. In this way, etching of free-standing few layer graphene could be demonstrated Our results enable evaluation of the degree of edge control that can be achieved by means of catalytic hydrogenation.
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