4.6 Article

Dense arrays of ordered GaAs nanostructures by selective area growth on substrates patterned by block copolymer lithography

Journal

APPLIED PHYSICS LETTERS
Volume 76, Issue 13, Pages 1689-1691

Publisher

AMER INST PHYSICS
DOI: 10.1063/1.126137

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GaAs has been selectively grown in a hexagonally ordered array of nanometer-scale holes with a density as high as similar to 10(11)/cm(2) by metalorganic chemical vapor deposition. This array of holes was created using block copolymer lithography, in which a thin layer of diblock copolymer was used as an etching mask to make dense holes in a 15-nm-thick SiNx film. These selectively grown nanoscale features are estimated to be 23 nm in diameter with narrow lateral size and height distributions as characterized by field-emission scanning electron microscopy and tapping mode atomic force microscopy. The narrow size distribution and uniform spatial position of the nanoscale dots we report offer potential advantages over self-assembled dots grown by the Stranski-Krastanow mode. (C) 2000 American Institute of Physics. [S0003-6951(00)02913-2].

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