Nano Archive

Gold-catalyzed oxide nanopatterns for the directed assembly of Ge island arrays on Si

Robinson, Jeremy T. and Ratto, Fulvio and Moutanabbir, Oussama and Heun, Stefan and Locatelli, Andrea and Mentes, T. Onur and Aballe, Lucia and Dubon, Oscar D. (2007) Gold-catalyzed oxide nanopatterns for the directed assembly of Ge island arrays on Si. NANO LETTERS, 7 (9). pp. 2655-2659.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/nl071051y

Abstract

The heteroepitaxial growth of Ge on Au-patterned Si(001) is investigated using in situ spectromicroscopy. Patterning of a hydrogen-terminated Si surface with a square array of Au dots followed by brief exposure to air leads to the spontaneous, local oxidation of Si. The resulting oxide nanopattern limits the surface migration of Au during annealing up to 600 degrees C, resulting in complete preservation of the Au pattern. Subsequent deposition of Ge induces a redistribution of Au across the surface even as the oxide nanopattern persists. As a result, the oxide pattern drives the growth of Ge islands into an ordered assembly, while Au decorates the surfaces of the Ge islands and modifies their shape.

Item Type:Article
Uncontrolled Keywords:AU-PATTERNED SI; SEMICONDUCTOR NANOSTRUCTURES; SI(001) SURFACE; GROWTH; SILICON; INTERFACE; PYRAMIDS; METAL; TRANSITION; MICROSCOPY
Subjects:Material Science > Nanofabrication processes and tools
Engineering > Nanotechnology applications in ICT
ID Code:6211
Deposited By:IoN
Deposited On:08 Sep 2009 12:18
Last Modified:08 Sep 2009 12:18

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