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.
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Yeoh, T., Mason, M., Feinberg, Z. et al. Insitu Observation of the Formation Dynamics of Nanohelices. MRS Online Proceedings Library 924, 606 (2006). https://doi.org/10.1557/PROC-0924-Z06-06