• Step-edge guided growth of nanowires on three-fold symmetric vicinal Si(111) surfaces

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    • Keywords

       

      Vicinal; three-fold symmetry; nanowire; scanning tunneling microscopy; molecular beam epitaxy.

    • Abstract

       

      Clean vicinal surfaces exhibit a stepped pattern due to the presence of narrow terraces formed on a clean surface. Therefore, this provides a platform for the aligned growth of nanowires. Using this type of surface as a template, we have grown nanowires of iron di-silicide, which are preferentially directed along the length of the terraces and are following the step-edges. These nanowires do not follow underlying three-fold symmetry of the substrate. We have thus shown two-fold symmetric growth on a three-fold symmetric surface, where diffusion barrier energy plays an important role in determining the shape of the islands. The orientations of nanowires are governed primarily by the presence of step-edges. However, the crystallographic symmetry properties of the underlying substrate have also played its role in controlling the nanowire orientation. The system was grown by molecular beam epitaxy and analysed by scanning tunneling microscopy.

    • Author Affiliations

       

      DEBOLINA DAS1 2 TIRTHANKAR CHOUDHURY2

      1. Indian Association for the Cultivation of Science, Jadavpur 700032, India
      2. Present address: Haldia Government College, Debhog 721657, India
    • Dates

       
  • Bulletin of Materials Science | News

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