Diameter Control of GaSb Nanowires Revealed by In Situ Environmental Transmission Electron Microscopy

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Abstract

Several nanowire properties are strongly dependent on their diameter, which is notoriously difficult to control for III–Sb nanowires compared with other III–V nanowires. Herein environmental transmission electron microscopy is utilized to study the growth of Au nanoparticle seeded GaSb nanowires in situ. In this study, the real time changes to morphology and nanoparticle composition as a result of precursor V/III ratio are investigated. For a wide range of the growth parameters, it is observed that decreasing the V/III ratio increases the nanoparticle volume through Ga accumulation in the nanoparticle. The increase in nanoparticle volume in turn forces the nanowire diameter to expand. The effect of the V/III ratio on diameter allows the engineering of diameter modulated nanowires, where the modulation persisted after the growth. Lastly, this study demonstrates the observed trends can be reproduced in a conventional ex situ system, highlighting the transferability and importance of the results obtained in situ.
Original languageEnglish
Pages (from-to)7404-7410
Number of pages7
JournalThe Journal of Physical Chemistry Letters
Volume14
Issue number33
DOIs
Publication statusPublished - 2023 Aug 11

Subject classification (UKÄ)

  • Condensed Matter Physics
  • Nano Technology
  • Materials Chemistry

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