What question did this study set out to answer?

To determine how surface properties, orientation, diameter, and passivation influence the thermodynamic stability and atomic structure of hexagonal III-V semiconductor nanowires.

September 15, 2007Journal of Applied Physics

Surface influence on stability and structure of hexagon-shaped III-V semiconductor nanorods

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Authors

RLR. LeitsmannChemnitz University of Technology FBF. BechstedtInstituto Tecnológico de Aeronáutica

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Implication

Ab initio study reveals surface-driven structural transitions in hexagonal III-V semiconductor nanowires, indicating surface energy dominates nanoscale crystal stability.

Key Points

To determine how surface properties, orientation, diameter, and passivation influence the thermodynamic stability and atomic structure of hexagonal III-V semiconductor nanowires.
Conducted ab initio first-principles calculations on [111]/[0001]-oriented hexagonal III-V semiconductor nanowires.
Modeled variations in crystal phase (zinc-blende versus wurtzite), surface passivation conditions, facet orientations, and wire diameters.
Nanowire stability is primarily dictated by the free surface energies of its facet planes, which differ only weakly from corresponding planar free surfaces.
Surface preparation conditions induce a structural phase transition between local zinc-blende and wurtzite geometries accompanied by facet reorientation, while the specific III-V chemical compound has minimal influence.
Atomic relaxation contracts bond lengths relative to bulk zinc-blende lattices, decreasing bilayer thicknesses along the axial growth direction.

Cite This Study

Leitsmann et al. (2007) studied this question.

synapsesocial.com/papers/6a9edecf558ae286e7454c72 https://doi.org/10.1063/1.2783899

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Implication

Ab initio study reveals surface-driven structural transitions in hexagonal III-V semiconductor nanowires, indicating surface energy dominates nanoscale crystal stability.

Surface influence on stability and structure of hexagon-shaped III-V semiconductor nanorods

Discussion

Member takes

Implication

Key Points

Cite This Study

Surface influence on stability and structure of hexagon-shaped III-V semiconductor nanorods

Discussion

Member takes

Implication

Key Points

Cite This Study

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