Visualizing the Mechanism Switching in High-Temperature Au-Catalyzed InAs Nanowire Growth
(2023) In Crystal Growth and Design 23(9). p.6228-6232- Abstract
We use environmental transmission electron microscopy to observe in situ the switch from an axial vapor-liquid-solid (VLS) growth mechanism in Au-catalyzed InAs nanowires toward a radial vapor-solid (VS) one, dominated by layers nucleating at the triple-phase line. At elevated temperatures, in addition to high V/III ratios, the affinity for In in the Au catalyst will be greater than that of In in InAs, which in turn reduces the driving force and probability for nucleation at the liquid-solid interface. Consequently, with increased temperature, the catalyst particle stops acting as a sink for incoming material and the decomposition of precursors away from the catalyst increases, making radial vapor-solid growth the dominating growth... (More)
We use environmental transmission electron microscopy to observe in situ the switch from an axial vapor-liquid-solid (VLS) growth mechanism in Au-catalyzed InAs nanowires toward a radial vapor-solid (VS) one, dominated by layers nucleating at the triple-phase line. At elevated temperatures, in addition to high V/III ratios, the affinity for In in the Au catalyst will be greater than that of In in InAs, which in turn reduces the driving force and probability for nucleation at the liquid-solid interface. Consequently, with increased temperature, the catalyst particle stops acting as a sink for incoming material and the decomposition of precursors away from the catalyst increases, making radial vapor-solid growth the dominating growth mechanism. It is further observed that the growth proceeds through multistep propagation rather than a layer-by-layer propagation under these conditions.
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- author
- Escobar Steinvall, Simon LU ; Johansson, Jonas LU ; Lehmann, Sebastian LU ; Tornberg, Marcus LU ; Jacobsson, Daniel LU and Dick, Kimberly A. LU
- organization
- publishing date
- 2023-09-06
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Crystal Growth and Design
- volume
- 23
- issue
- 9
- pages
- 5 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:85168612849
- ISSN
- 1528-7483
- DOI
- 10.1021/acs.cgd.3c00138
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2023 The Authors. Published by American Chemical Society.
- id
- 7f39e9a0-9bbb-4183-90fd-735ad3f1fe2e
- date added to LUP
- 2023-11-14 14:07:53
- date last changed
- 2023-12-18 15:30:57
@article{7f39e9a0-9bbb-4183-90fd-735ad3f1fe2e, abstract = {{<p>We use environmental transmission electron microscopy to observe in situ the switch from an axial vapor-liquid-solid (VLS) growth mechanism in Au-catalyzed InAs nanowires toward a radial vapor-solid (VS) one, dominated by layers nucleating at the triple-phase line. At elevated temperatures, in addition to high V/III ratios, the affinity for In in the Au catalyst will be greater than that of In in InAs, which in turn reduces the driving force and probability for nucleation at the liquid-solid interface. Consequently, with increased temperature, the catalyst particle stops acting as a sink for incoming material and the decomposition of precursors away from the catalyst increases, making radial vapor-solid growth the dominating growth mechanism. It is further observed that the growth proceeds through multistep propagation rather than a layer-by-layer propagation under these conditions.</p>}}, author = {{Escobar Steinvall, Simon and Johansson, Jonas and Lehmann, Sebastian and Tornberg, Marcus and Jacobsson, Daniel and Dick, Kimberly A.}}, issn = {{1528-7483}}, language = {{eng}}, month = {{09}}, number = {{9}}, pages = {{6228--6232}}, publisher = {{The American Chemical Society (ACS)}}, series = {{Crystal Growth and Design}}, title = {{Visualizing the Mechanism Switching in High-Temperature Au-Catalyzed InAs Nanowire Growth}}, url = {{http://dx.doi.org/10.1021/acs.cgd.3c00138}}, doi = {{10.1021/acs.cgd.3c00138}}, volume = {{23}}, year = {{2023}}, }