Origin of Polytype Formation in VLS-Grown Ge Nanowires through Defect Generation and Nanowire Kinking

We propose layer-by-layer growth mechanisms to account for planar defect generation leading to kinked polytype nanowires. Cs-corrected scanning transmission electron microscopy enabled identification of stacking sequences of distinct polytype bands found in kinked nanowires, and Raman spectroscopy w...

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Published in:Nano letters 2013-08, Vol.13 (8), p.3947-3952
Main Authors: Jeon, Nari, Dayeh, Shadi A, Lauhon, Lincoln J
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Defects
Diamonds
Exact sciences and technology
Fullerenes and related materials
diamonds, graphite
Materials science
Methods of nanofabrication
Morphology
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Nanostructure
Nanowires
Nucleation
Physics
Polytypes
Quantum wires
Specific materials
Stacking
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cited_by cdi_FETCH-LOGICAL-a444t-966e5795a971a4523670bcb1d7f1d8d21cd7846be1477400cc2a660eb5dbc6303
cites cdi_FETCH-LOGICAL-a444t-966e5795a971a4523670bcb1d7f1d8d21cd7846be1477400cc2a660eb5dbc6303
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creator Jeon, Nari
Dayeh, Shadi A
Lauhon, Lincoln J
description We propose layer-by-layer growth mechanisms to account for planar defect generation leading to kinked polytype nanowires. Cs-corrected scanning transmission electron microscopy enabled identification of stacking sequences of distinct polytype bands found in kinked nanowires, and Raman spectroscopy was used to distinguish polytype nanowires from twinned nanowires containing only the 3C diamond cubic phase. The faceting and atomic-scale defect structures of twinned 3C are compared with those of polytype nanowires to develop a common model linking nucleation pinning to nanowire morphology and phase.
doi_str_mv 10.1021/nl402117b
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source American Chemical Society:Jisc Collections:American Chemical Society Read & Publish Agreement 2022-2024 (Reading list)
subjects Cross-disciplinary physics: materials science
rheology
Defects
Diamonds
Exact sciences and technology
Fullerenes and related materials
diamonds, graphite
Materials science
Methods of nanofabrication
Morphology
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Nanostructure
Nanowires
Nucleation
Physics
Polytypes
Quantum wires
Specific materials
Stacking
title Origin of Polytype Formation in VLS-Grown Ge Nanowires through Defect Generation and Nanowire Kinking
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