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Direct Observation of Liquid–Solid Two-Phase Seed Particle-Assisted Kinking in GaP Nanowire Growth

Hu, Tianyi LU ; Seifner, Michael S. LU orcid ; Snellman, Markus LU ; Jacobsson, Daniel LU ; Sedrpooshan, Mehran LU ; Ternero, Pau LU ; Messing, Maria E. LU and Dick, Kimberly A. LU (2023) In Small Structures 4(9).
Abstract

In the last decades, the metal-assisted growth approach of semiconductor nanowires (NWs) has shown its potential in controlling crystal properties, such as crystal structure, composition, and morphology. Recently, literature reports have shown successful semiconductor NW growth with multiphase seed particles under growth conditions. Exploring alternative metal seeds and the mechanisms for growing semiconductor NWs is an exciting research field aiming to improve the control over the crystal growth process. Herein, the gallium phosphide (GaP) NW growth using Cu as seed particles inside an environmental transmission electron microscope is studied. In particular, the transformations of the Cu-rich seed particles during the nucleation and... (More)

In the last decades, the metal-assisted growth approach of semiconductor nanowires (NWs) has shown its potential in controlling crystal properties, such as crystal structure, composition, and morphology. Recently, literature reports have shown successful semiconductor NW growth with multiphase seed particles under growth conditions. Exploring alternative metal seeds and the mechanisms for growing semiconductor NWs is an exciting research field aiming to improve the control over the crystal growth process. Herein, the gallium phosphide (GaP) NW growth using Cu as seed particles inside an environmental transmission electron microscope is studied. In particular, the transformations of the Cu-rich seed particles during the nucleation and growth of GaP NWs are observed. The supply of a relatively high amount of Ga atoms by the precursor mixture led to a solid Cu-rich seed particle core covered by a liquid phase. Different growth dynamics within the two-phase seed particle resulted in local competition in NW growth. As a result, the GaP NW kinked into another growth direction by forming a new interface at the NW growth front. The generated results enable insights into fundamental processes occurring in the seed particle during growth, creating leverage points for controlling the NW morphology.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
alternative seed particles, gallium phosphide, in situ TEM, kinking, liquid-assisted VSS mechanism, nanowires, phase transformations
in
Small Structures
volume
4
issue
9
article number
2300011
pages
10 pages
publisher
Wiley
external identifiers
  • scopus:85166186481
ISSN
2688-4062
DOI
10.1002/sstr.202300011
language
English
LU publication?
yes
id
ea5fbf19-837a-47a2-a16f-40109ad1c6af
date added to LUP
2023-12-11 11:35:12
date last changed
2023-12-14 16:16:24
@article{ea5fbf19-837a-47a2-a16f-40109ad1c6af,
  abstract     = {{<p>In the last decades, the metal-assisted growth approach of semiconductor nanowires (NWs) has shown its potential in controlling crystal properties, such as crystal structure, composition, and morphology. Recently, literature reports have shown successful semiconductor NW growth with multiphase seed particles under growth conditions. Exploring alternative metal seeds and the mechanisms for growing semiconductor NWs is an exciting research field aiming to improve the control over the crystal growth process. Herein, the gallium phosphide (GaP) NW growth using Cu as seed particles inside an environmental transmission electron microscope is studied. In particular, the transformations of the Cu-rich seed particles during the nucleation and growth of GaP NWs are observed. The supply of a relatively high amount of Ga atoms by the precursor mixture led to a solid Cu-rich seed particle core covered by a liquid phase. Different growth dynamics within the two-phase seed particle resulted in local competition in NW growth. As a result, the GaP NW kinked into another growth direction by forming a new interface at the NW growth front. The generated results enable insights into fundamental processes occurring in the seed particle during growth, creating leverage points for controlling the NW morphology.</p>}},
  author       = {{Hu, Tianyi and Seifner, Michael S. and Snellman, Markus and Jacobsson, Daniel and Sedrpooshan, Mehran and Ternero, Pau and Messing, Maria E. and Dick, Kimberly A.}},
  issn         = {{2688-4062}},
  keywords     = {{alternative seed particles; gallium phosphide; in situ TEM; kinking; liquid-assisted VSS mechanism; nanowires; phase transformations}},
  language     = {{eng}},
  number       = {{9}},
  publisher    = {{Wiley}},
  series       = {{Small Structures}},
  title        = {{Direct Observation of Liquid–Solid Two-Phase Seed Particle-Assisted Kinking in GaP Nanowire Growth}},
  url          = {{http://dx.doi.org/10.1002/sstr.202300011}},
  doi          = {{10.1002/sstr.202300011}},
  volume       = {{4}},
  year         = {{2023}},
}