Fabrication of nanorods by metal evaporation inside the pores of ultra-thin porous alumina templates
| Autor: | Kokonou, M., Rebholz, Claus, Giannakopoulos, K. P., Doumanidis, C. C. |
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| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Materials science
Fabrication porosity Metal evaporation Alumina Evaporation Nanowire Bioengineering Nanotechnology Substrate (electronics) Aspect-ratio pores aluminum oxide Electrochemistry General Materials Science Porous materials Electrical and Electronic Engineering Porosity Mechanical Engineering article General Chemistry Nanostructured materials Evaporation (deposition) Aspect ratio (image) nanorod Chemical engineering priority journal Mechanics of Materials Nanorod Nanodot |
| Zdroj: | Nanotechnology |
| Popis: | Porous alumina has attracted a great deal of attention as a template material for the growth of nanowires and nanodots. Typically, the pores have a high aspect ratio, which forbids the use of evaporation techniques for filling them, due to a pore closure effect. For this reason electrochemical methods are mainly used. However, there are materials, such as Al, which are very difficult to deposit electrochemically. In this work, the fabrication of Al nanorods by electron gun evaporation into low aspect-ratio pores of ultra-thin porous alumina templates is described. The thicknesses of the templates are in the range from 50 to 70 nm, while their pores have diameters from 20 to 40 nm, i.e. their diameter:height aspect ratios are very low, from 1:1.5 to 1:3. These properties make it possible to completely fill the pores with evaporation techniques. This method can be generalized to any target and substrate material. © IOP Publishing Ltd. 18 |
| Databáze: | OpenAIRE |
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