AVS 53rd International Symposium
    Nanometer-scale Science and Technology Friday Sessions
       Session NS-FrM

Paper NS-FrM5
Controlling the Width of Self Assembled Nanowires on the Si(001) Surface

Friday, November 17, 2006, 9:20 am, Room 2016

Session: Nanowires
Presenter: J. Nogami, University of Toronto, Canada
Authors: J. Nogami, University of Toronto, Canada
Y. Cui, University of Toronto, Canada
J. Chung, University of Toronto, Canada
D. Grozea, University of Toronto, Canada
C. Ohbuchi, National Institute for Materials Science, Japan
Correspondent: Click to Email
Many low dimensional structures arise from self-assembly when depositing metals onto silicon surfaces, including both quantum dots and quantum wires. One class of these objects are rare earth silicide nanowires that grow on Si(001).@footnote 1@ In any self assembled nanostructure, one of the critical issues is control over feature size. In the case of metals deposited on the Si(111) surface, the 7x7 reconstruction has been used as a template to create clusters with a very narrow size distribution, where the metal atoms are confined to one half of the reconstruction unit cell.@footnote 2@ We present STM data that shows it is possible to use a metal induced 2x7 reconstruction of Si(001)@footnote 3@ to narrow the width distribution of Dy silicide nanowires. The interaction between the reconstruction and the nanowires is more complex than in the 7x7 case since nanowire growth induces local changes in the 2x7 periodicity. We will suggest possible mechanisms for the templating phenomenon. @FootnoteText@ @footnote 1@ J. Nogami et al, Phys. Rev. B 63 (2001) 233305.@footnote 2@ J. Jia et al, Appl. Phys. Lett 80 (2002) 3186.@footnote 3@ B.Z. Liu and J. Nogami, Surf. Sci. 540 (2003) 136.