Post-nucleation evolution of the liquid-solid interface in nanowire growth
(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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- author
- Maliakkal, Carina B. LU ; Jacobsson, Daniel LU ; Tornberg, Marcus LU and Dick, Kimberly A. LU
- organization
- publishing date
- 2022-03-05
- 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
- 2024-05-02 06:40:30
@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}},
}