Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 14, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3648105
Keywords
ab initio calculations; bonds (chemical); carbon nanotubes; chirality; graphene; nanofabrication; surface morphology
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Funding
- Vanderbilt University
- [HDTRA 1-10-10016]
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Longitudinal unzipping of carbon nanotubes (CNTs) can create graphene nano-ribbons (GNRs) with predetermined width. Experiments have used thus far an oxidative-induced unzipping approach that produces residual oxygen impurities. Here, we employ results of first-principles calculations to demonstrate an alternative scenario of GNR formation. We show that hydrogen loading at open CNT ends leads to successive C-C bond breaking and opening of CNTs to GNRs with edge morphologies that depend on CNT chirality. We also show that re-zipping of partially open CNTs can lead to new type of materials, for example, CNTs with lines of oxygen inter-carbon bridges. (C) 2011 American Institute of Physics. [doi:10.1063/1.3648105]
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