Insitu Observation of the Formation Dynamics of Nanohelices


Strained InGaAs/GaAs bridges were released by a focused ion beam in order to observe the relaxation dynamics of the structure. Releasing the bridges resulted in the formation of chiral nanotubes with diameter of 920 nm and length 8.5 microns. The total time required for nanoscroll formation took > 20 minutes. From observing the scrolling action through time, it was found that the strain relief process differed from traditional wet etched nanoscrolls due to the simultaneous relief of strain from the released structures.

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


  1. [1]

    V. Y. Prinz, V. A. Seleznev, A. K. Gutakovsky, C. A. V., V. V. Preobrazhenskii, M. A. Putyato, and T. A. Gavrilova, “Free-standing and overgrown InGaAs/GaAs nanotubes, nanohelices, and their arrays,” Physica E, vol. 6, pp. 828–831, 2000.

    CAS  Article  Google Scholar 

  2. [2]

    A. Vorob’ev, P. O. Voccaro, K. Kubota, T. Aida, T. Tokuda, T. Hayashi, Y. Sakano, J. Ohta, and M. Nunoshita, “SiGe/Si microtubes fabricated on a silicon-on-insulator substrate,” Journal of Physics D: Applied Physics, vol. 36, pp. 71–73, 2003.

    Google Scholar 

  3. [3]

    O. Schumacher, S. Mendach, H. Welsch, A. Schramm, C. Heyn, and W. Hansen, “Lithographically defined metal-semiconductor-hybrid nanoscrolls,” Applied Physics Letters, vol. 86, pp. 143109, 2005.

    Article  Google Scholar 

Download references

Author information



Corresponding author

Correspondence to Terence Yeoh.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Yeoh, T., Mason, M., Feinberg, Z. et al. Insitu Observation of the Formation Dynamics of Nanohelices. MRS Online Proceedings Library 924, 606 (2006).

Download citation