Closed-Edged Graphene Nanoribbons from Large-Diameter Collapsed Nanotubes
| Autor: | Vicki L. Colvin, Robert H. Hauge, Chenguang Zhang, Zhengzong Sun, James M. Tour, Ksenia V. Bets, Francesca Mirri, Boris I. Yakobson, Seung Soo Lee |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Carbon nanofiber Graphene General Engineering Selective chemistry of single-walled nanotubes General Physics and Astronomy Mechanical properties of carbon nanotubes Carbon nanotube Molecular physics law.invention Optical properties of carbon nanotubes Condensed Matter::Materials Science Potential applications of carbon nanotubes law General Materials Science Composite material Graphene nanoribbons |
| Zdroj: | ACS Nano. 6:6023-6032 |
| ISSN: | 1936-086X 1936-0851 |
| Popis: | The diameter dependence of the collapse of single- and double-walled carbon nanotubes to two- and four-walled graphene nanoribbons with closed edges (CE(x)GNRs) has been experimentally determined and compared to theory. TEM and AFM were used to characterize nanotubes grown from preformed 4.0 nm diameter aluminum-iron oxide particles. Experimental data indicate that the energy equivalence point (the diameter at which the energy of a round and fully collapsed nanotube is the same) is 2.6 and 4.0 nm for single- and double-walled carbon nanotubes, respectively. Molecular dynamics simulations predict similar energy equivalence diameters with the use of ε = 54 meV/pair to calculate the carbon-carbon van der Waals interaction. |
| Databáze: | OpenAIRE |
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