2007
DOI: 10.1063/1.2767768
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Fabrication of in situ ultrathin anodic aluminum oxide layers for nanostructuring on silicon substrate

Abstract: The authors demonstrate a method for the fabrication of in situ ultrathin porous anodic aluminum oxide layers ͑aspect ratioϽ 2:1͒ on Si, which can be directly used as templates for nanodot preparation and for pattern transfer. The regular shape of the aluminum oxide pores is maintained even when the thickness of the aluminum oxide template is reduced to 50 nm. By using these in situ ultrathin templates as lift-off masks, the authors successfully prepared a Ba x Sr 1−x TiO 3 nanodot array on Si surface. Further… Show more

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Cited by 15 publications
(11 citation statements)
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“…Four lattice constant were investigated, a = 130, 260, 390 and 520 nm and for each of them the radius varies as r = 0.2a, 0.3a and 0.4a. Those dimensions are compatible with the dimensions of the AAO templates fabricated at Delft University of Technology [6]. They are also close to the ones usually used in PCW designs made of silicon.…”
Section: Photonic-crystal Waveguide Considerationsupporting
confidence: 68%
“…Four lattice constant were investigated, a = 130, 260, 390 and 520 nm and for each of them the radius varies as r = 0.2a, 0.3a and 0.4a. Those dimensions are compatible with the dimensions of the AAO templates fabricated at Delft University of Technology [6]. They are also close to the ones usually used in PCW designs made of silicon.…”
Section: Photonic-crystal Waveguide Considerationsupporting
confidence: 68%
“…In order to obtain a through-hole nanoporous AAO membrane with a certain pore diameter, usually posttreatment procedures are applied including a wet-chemical route to the selective and uniform removal of the remaining Al substrate followed by etching of the barrier layer. The pore opening process can be performed using a dry etching with an Ar + ion beam [25][26][27][28], Ga + ion beam [29,30], BCl 3 reactive ions [31], and CF 4 reactive ions [32]. Although the dry etching process is capable of removing the barrier layer on a selected surface area (opening of even single pore), the technique requires an expensive and sophisticated equipment.…”
Section: Introductionmentioning
confidence: 99%
“…After consuming of all Al, oxidation of Si starts and then the current continuously falls down by getting thicker oxide. A similar anodisation condition on e-beam evaporated thick Al on Si have been reported in literature [18] but for ultra thin Al layer I-t relation considerably changes [19]. Another observation is that if a prolonged anodization is used in the last stage, one will have the free standing Al 2 O 3 films.…”
Section: Resultsmentioning
confidence: 72%