Nano Archive

Step-mediated size selection and ordering of heteroepitaxial nanocrystals

Goldfarb, I. (2007) Step-mediated size selection and ordering of heteroepitaxial nanocrystals. NANOTECHNOLOGY, 18 (33).

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Official URL: http://www.iop.org/EJ/abstract/-search=66089272.1/...

Abstract

It is necessary to control the size, shape, and uniformity of self-assembled and self-organized nanocrystals in order to use them in real devices. The way to achieve this in epitaxial nanocrystal arrays is by manipulating the bulk stress and/or the surface stress. In this work, an additional and fundamentally different mechanism of CoSi2 nanocrystal size selection is reported, based on a preferential reaction of Co adatoms with Si ledge atoms at the step bunches on a vicinal Si(111) surface, where the mean silicide nanocrystal size and nanocrystal-nanocrystal separation distance along the ledge are determined by the step-bunch height. These results may have important implications for the lithography-free fabrication of ordered functional nanostructure ensembles.

Item Type:Article
Uncontrolled Keywords:SCANNING-TUNNELING-MICROSCOPY; QUANTUM-DOT SUPERLATTICES; CELLULAR-AUTOMATA; SELF-ORGANIZATION; FILM GROWTH; THIN-FILMS; ISLANDS; GE; NUCLEATION; SI(001)
Subjects:Material Science > Functional and hybrid materials
Material Science > Nanofabrication processes and tools
ID Code:6448
Deposited By:IoN
Deposited On:24 Sep 2009 10:30
Last Modified:24 Sep 2009 10:30

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