화학공학소재연구정보센터
Applied Surface Science, Vol.255, No.6, 3563-3566, 2009
Large-area silica nanotubes with controllable geometry on silicon substrates
The synthesis of a highly uniform, large-scale nanoarrays consisting of silica nanotubes above embedded nanohole arrays in silicon substrates is demonstrated. In situ anodized aluminium oxide (AAO) thin film masks on Si substrates were employed, and the nanotubes were fabricated by Ar ion milling through the masks. The geometries of the nanoarrays, including pore diameter, interpore distance and the length of both nanopores and nanotubes could be controlled by the process parameters, which included that the outer pore diameter of silica tube was tuned from similar to 80 nm to similar to 135 nm while the inner tube diameter from similar to 40 nm to similar to 65 nm, the interpore distance of the nanotube arrays was from 100 nm to 180 nm and the length of silica tube changed from similar to 90 nm to similar to 250 nm. The presented nanostructure fabrication method has strong potential for application in intensity and frequency adjustable high luminescence efficiency optoelectronic devices. (C) 2008 Elsevier B.V. All rights reserved.