Atomic structure of metal-free and catalyzed Si nanowires

Abstract

Metal-free and Au-catalyzed silicon nanowires (Si-NWs) grown at low temperatures have been analyzed through transmission electron microscopy (TEM) and scanning electron microscopy (SEM), and their crystalline phase studied. All the observed nanowires are crystalline, grow along two different directions, <110> or <112>, and contain high density of planar defects, such as stacking faults (SFs) and twins. The defect size is comparable to the wire diameter for the metal-free process whilst it is much larger than the wire diameter for the Aucatalyzed Si-NWs. In this latter case parallel SFs may re-arrange and transform in a metastable rhombohedral 9R polytype structure whose formation mechanism is discussed.

This is a preview of subscription content, access via your institution.

References

  1. 1.

    R. S. Wagner and W. C. Ellis Appl. Phys. Lett. 4, 89 (1964).

    CAS  Article  Google Scholar 

  2. 2.

    M. Cuscunà, A. Convertino,L. Mariucci,G. Fortunato,L. Felisari,G. Nicotra, C. Spinella, A. Pecora, and F. Martelli, Nanotechnology 21, 255601 (2010).

    Article  Google Scholar 

  3. 3.

    X. Liu and D. Wang Nano Res 2, 575 (2009)

    CAS  Article  Google Scholar 

  4. 4.

    C. Cayron, M. D. Hertog, L. Latu-Romain, C. Mouchet, C. Secouard, J. Rouviere, E. Rouvierea and J. Simonato, J. Appl. Cryst., 42, 242 (2009)

    CAS  Article  Google Scholar 

  5. 5.

    A . Fontcuberta i Morral, J. Arbiol, J.D. Prades, A. Cirera, J.R. Morante, Adv. Mater. 19, 1347–1351 (2007)

    CAS  Article  Google Scholar 

  6. 6.

    F. M. Davidson, D. C. Lee, D. D. Fanfair, and B. A. Korgel J. Phys. Chem. C, 111, 2929 (2007)

    CAS  Article  Google Scholar 

  7. 7.

    F. J. Lopez, E. R. Hemesath, and L. J. Lauhon, Nano Lett., 9, No. 7, (2009)

    Article  Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to Giuseppe Nicotra.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Nicotra, G., Bongiorno, C., Convertino, A. et al. Atomic structure of metal-free and catalyzed Si nanowires. MRS Online Proceedings Library 1305, 204 (2011). https://doi.org/10.1557/opl.2011.296

Download citation