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Post-nucleation evolution of the liquid-solid interface in nanowire growth

Maliakkal, Carina B. LU ; Jacobsson, Daniel LU orcid ; Tornberg, Marcus LU and Dick, Kimberly A. LU (2022) In Nanotechnology 33(10).
Abstract

We study using in situ transmission electron microscopy the birth of GaAs nanowires from liquid Au-Ga catalysts on amorphous substrates. Lattice-resolved observations of the starting stages of growth are reported here for the first time. It reveals how the initial nanostructure evolves into a nanowire growing in a zincblende 111 or the equivalent wurtzite0001 direction. This growth direction(s) is what is typically observed in most III-V and II-VI nanowires. However, the reason for this preferential nanowire growth along this direction is still a dilemma. Based on the videos recorded shortly after the nucleation of nanowires, we argue that the lower catalyst droplet-nanowire interface energy of the {111} facet when zincblende (or the... (More)

We study using in situ transmission electron microscopy the birth of GaAs nanowires from liquid Au-Ga catalysts on amorphous substrates. Lattice-resolved observations of the starting stages of growth are reported here for the first time. It reveals how the initial nanostructure evolves into a nanowire growing in a zincblende 111 or the equivalent wurtzite0001 direction. This growth direction(s) is what is typically observed in most III-V and II-VI nanowires. However, the reason for this preferential nanowire growth along this direction is still a dilemma. Based on the videos recorded shortly after the nucleation of nanowires, we argue that the lower catalyst droplet-nanowire interface energy of the {111} facet when zincblende (or the equivalent {0001} facet in wurtzite) is the reason for this direction selectivity in nanowires.

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Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
catalyst-nanowire interface energy, growth direction, in situ TEM, lattice resolved, nucleation
in
Nanotechnology
volume
33
issue
10
article number
105607
publisher
IOP Publishing
external identifiers
  • pmid:34847548
  • scopus:85122842775
ISSN
0957-4484
DOI
10.1088/1361-6528/ac3e8d
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2021 The Author(s). Published by IOP Publishing Ltd.
id
2fd4752b-1dc0-49c9-b308-28660ff44b33
date added to LUP
2022-02-08 10:57:54
date last changed
2025-10-14 12:25:54
@article{2fd4752b-1dc0-49c9-b308-28660ff44b33,
  abstract     = {{<p>We study using in situ transmission electron microscopy the birth of GaAs nanowires from liquid Au-Ga catalysts on amorphous substrates. Lattice-resolved observations of the starting stages of growth are reported here for the first time. It reveals how the initial nanostructure evolves into a nanowire growing in a zincblende 111 or the equivalent wurtzite0001 direction. This growth direction(s) is what is typically observed in most III-V and II-VI nanowires. However, the reason for this preferential nanowire growth along this direction is still a dilemma. Based on the videos recorded shortly after the nucleation of nanowires, we argue that the lower catalyst droplet-nanowire interface energy of the {111} facet when zincblende (or the equivalent {0001} facet in wurtzite) is the reason for this direction selectivity in nanowires.</p>}},
  author       = {{Maliakkal, Carina B. and Jacobsson, Daniel and Tornberg, Marcus and Dick, Kimberly A.}},
  issn         = {{0957-4484}},
  keywords     = {{catalyst-nanowire interface energy; growth direction; in situ TEM; lattice resolved; nucleation}},
  language     = {{eng}},
  month        = {{03}},
  number       = {{10}},
  publisher    = {{IOP Publishing}},
  series       = {{Nanotechnology}},
  title        = {{Post-nucleation evolution of the liquid-solid interface in nanowire growth}},
  url          = {{http://dx.doi.org/10.1088/1361-6528/ac3e8d}},
  doi          = {{10.1088/1361-6528/ac3e8d}},
  volume       = {{33}},
  year         = {{2022}},
}