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- Tornberg, MarcusLund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH (author)
Kinetics of Au-Ga Droplet Mediated Decomposition of GaAs Nanowires
- Article/chapterEnglish2019
Publisher, publication year, extent ...
- 2019-04-30
- American Chemical Society (ACS),2019
Numbers
- LIBRIS-ID:oai:lup.lub.lu.se:1d5e7658-3d85-4410-a418-5bfd0de72e20
- https://lup.lub.lu.se/record/1d5e7658-3d85-4410-a418-5bfd0de72e20URI
- https://doi.org/10.1021/acs.nanolett.9b00321DOI
Supplementary language notes
- Language:English
- Summary in:English
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Notes
- Particle-assisted III-V semiconductor nanowire growth and applications thereof have been studied extensively. However, the stability of nanowires in contact with the particle and the particle chemical composition as a function of temperature remain largely unknown. In this work, we use in situ transmission electron microscopy to investigate the interface between a Au-Ga particle and the top facet of an ?1 1 1 ?-oriented GaAs nanowire grown via the vapor-liquid-solid process. We observed a thermally activated bilayer-by-bilayer removal of the GaAs facet in contact with the liquid particle during annealing between 300 and 420 °C in vacuum. Interestingly, the GaAs-removal rates initially depend on the thermal history of the sample and are time-invariant at later times. In situ X-ray energy dispersive spectroscopy was also used to determine that the Ga content in the particle at any given temperature remains constant over extended periods of time and increases with increasing temperature from 300 to 400 °C. We attribute the observed phenomena to droplet-assisted decomposition of GaAs at a rate that is controlled by the amount of Ga in the droplet. We suggest that the observed transients in removal rates are a direct consequence of time-dependent changes in the Ga content. Our results provide new insights into the role of droplet composition on the thermal stability of GaAs nanowires and complement the existing knowledge on the factors influencing nanowire growth. Moreover, understanding the nanowire stability and decomposition is important for improving processing protocols for the successful fabrication and sustained operation of nanowire-based devices.
Subject headings and genre
- TEKNIK OCH TEKNOLOGIER Nanoteknik Nanoteknik hsv//swe
- ENGINEERING AND TECHNOLOGY Nano-technology Nano-technology hsv//eng
- NATURVETENSKAP Fysik Den kondenserade materiens fysik hsv//swe
- NATURAL SCIENCES Physical Sciences Condensed Matter Physics hsv//eng
- annealing
- GaAs
- in situ
- Nanowire
- transmission electron microscopy
- X-ray energy-dispersive spectroscopy
Added entries (persons, corporate bodies, meetings, titles ...)
- Jacobsson, DanielLund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Centrum för analys och syntes,Kemiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Centre for Analysis and Synthesis,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)ftf-dlj (author)
- Persson, Axel R.Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Centrum för analys och syntes,Kemiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Centre for Analysis and Synthesis,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)chem-axp (author)
- Wallenberg, ReineLund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Centrum för analys och syntes,Kemiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Centre for Analysis and Synthesis,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)ook2-rwa (author)
- DIck, Kimberly A.Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Centrum för analys och syntes,Kemiska institutionen,Other operations, LTH,Faculty of Engineering, LTH,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Centre for Analysis and Synthesis,Department of Chemistry,Faculty of Engineering, LTH(Swepub:lu)ftf-kdi (author)
- Kodambaka, SuneelUniversity of California, Los Angeles(Swepub:lu)su8645ko (author)
- NanoLund: Centre for NanoscienceAnnan verksamhet, LTH (creator_code:org_t)
Related titles
- In:Nano Letters: American Chemical Society (ACS), s. 3498-35041530-69841530-6992
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