He4 Adsorbed on the Outer Surface of Carbon Nanotube Bundles
The results of diffusion Monte Carlo calculations on the behavior of He4 adsorbed on the external surface of a bundle of carbon nanotubes are presented. The corrugation effects are found to be very important, making the outside part of the bundles a quite inhomogeneous substrate. No stable solid hel...
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2008 |
| País: | España |
| Institución: | Universidad Pablo de Olavide (UPO) |
| Repositorio: | RIO. Repositorio Institucional Olavide |
| Idioma: | inglés |
| OAI Identifier: | oai:rio.upo.es:10433/934 |
| Acceso en línea: | http://hdl.handle.net/10433/934 |
| Access Level: | acceso abierto |
| Palabra clave: | Monte Carlo calculations Carbon nanotubes |
| Sumario: | The results of diffusion Monte Carlo calculations on the behavior of He4 adsorbed on the external surface of a bundle of carbon nanotubes are presented. The corrugation effects are found to be very important, making the outside part of the bundles a quite inhomogeneous substrate. No stable solid helium monolayer at high density was found. Instead, helium atoms are promoted to a second quasi-one-dimensional phase on top of the liquid first layer. On increasing the helium intake, a two layer structure is formed in which the helium directly in contact with the carbon surface solidifies. |
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