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Related Experiment Videos

Capillary instability in nanowire geometries.

Timofey Frolov1, W Craig Carter, Mark Asta

  • 1Department of Materials Science and Engineering, University of California , Berkeley, California 94720, United States.

Nano Letters
|May 21, 2014
PubMed
Summary

A capillary instability in nanowire growth can cause kinking. This study reveals the instability

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Physics

Background:

  • The vapor-liquid-solid (VLS) mechanism is crucial for nanowire fabrication.
  • Understanding wetting phenomena is key to controlling nanowire morphology.

Purpose of the Study:

  • To investigate the intrinsic capillary instability in VLS nanowire growth.
  • To establish the conditions leading to wetting configuration transitions.

Main Methods:

  • Atomistic simulations were employed to model the system.
  • Theoretical analyses were performed to understand the underlying physics.

Main Results:

  • A capillary instability intrinsic to VLS wetting geometries was identified.
  • A transition from axisymmetric to tilted wetting configurations was established.
  • This transition is governed by Young's force-balance condition at the triple line.

Conclusions:

  • The identified instability is linked to nanowire kinking.
  • Results offer insights for controlled growth of complex crystalline nanowires.

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