Cargando…
β-Ga(2)O(3) Nanostructures: Chemical Vapor Deposition Growth Using Thermally Dewetted Au Nanoparticles as Catalyst and Characterization
β-Ga(2)O(3) nanostructures, including nanowires (NWs), nanosheets (NSHs), and nanorods (NRs), were synthesized using thermally dewetted Au nanoparticles as catalyst in a chemical vapor deposition process. The morphology of the as-grown β-Ga(2)O(3) nanostructures depends strongly on the growth temper...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9370184/ https://www.ncbi.nlm.nih.gov/pubmed/35957023 http://dx.doi.org/10.3390/nano12152589 |
_version_ | 1784766713048334336 |
---|---|
author | Yadav, Asha Fu, Bo Bonvicini, Stephanie Nicole Ly, Linh Quy Jia, Zhitai Shi, Yujun |
author_facet | Yadav, Asha Fu, Bo Bonvicini, Stephanie Nicole Ly, Linh Quy Jia, Zhitai Shi, Yujun |
author_sort | Yadav, Asha |
collection | PubMed |
description | β-Ga(2)O(3) nanostructures, including nanowires (NWs), nanosheets (NSHs), and nanorods (NRs), were synthesized using thermally dewetted Au nanoparticles as catalyst in a chemical vapor deposition process. The morphology of the as-grown β-Ga(2)O(3) nanostructures depends strongly on the growth temperature and time. Successful growth of β-Ga(2)O(3) NWs with lengths of 7–25 μm, NSHs, and NRs was achieved. It has been demonstrated that the vapor–liquid–solid mechanism governs the NW growth, and the vapor–solid mechanism occurs in the growth of NSHs and NRs. The X-ray diffraction analysis showed that the as-grown nanostructures were highly pure single-phase β-Ga(2)O(3). The bandgap of the β-Ga(2)O(3) nanostructures was determined to lie in the range of 4.68–4.74 eV. Characteristic Raman peaks were observed with a small blue and red shift, both of 1–3 cm(−1), as compared with those from the bulk, indicating the presence of internal strain and defects in the as-grown β-Ga(2)O(3) nanostructures. Strong photoluminescence emission in the UV-blue spectral region was obtained in the β-Ga(2)O(3) nanostructures, regardless of their morphology. The UV (374–377 nm) emission is due to the intrinsic radiative recombination of self-trapped excitons present at the band edge. The strong blue (404–490 nm) emissions, consisting of five bands, are attributed to the presence of the complex defect states in the donor (V(O)) and acceptor (V(Ga) or V(Ga–O)). These β-Ga(2)O(3) nanostructures are expected to have potential applications in optoelectronic devices such as tunable UV–Vis photodetectors. |
format | Online Article Text |
id | pubmed-9370184 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-93701842022-08-12 β-Ga(2)O(3) Nanostructures: Chemical Vapor Deposition Growth Using Thermally Dewetted Au Nanoparticles as Catalyst and Characterization Yadav, Asha Fu, Bo Bonvicini, Stephanie Nicole Ly, Linh Quy Jia, Zhitai Shi, Yujun Nanomaterials (Basel) Article β-Ga(2)O(3) nanostructures, including nanowires (NWs), nanosheets (NSHs), and nanorods (NRs), were synthesized using thermally dewetted Au nanoparticles as catalyst in a chemical vapor deposition process. The morphology of the as-grown β-Ga(2)O(3) nanostructures depends strongly on the growth temperature and time. Successful growth of β-Ga(2)O(3) NWs with lengths of 7–25 μm, NSHs, and NRs was achieved. It has been demonstrated that the vapor–liquid–solid mechanism governs the NW growth, and the vapor–solid mechanism occurs in the growth of NSHs and NRs. The X-ray diffraction analysis showed that the as-grown nanostructures were highly pure single-phase β-Ga(2)O(3). The bandgap of the β-Ga(2)O(3) nanostructures was determined to lie in the range of 4.68–4.74 eV. Characteristic Raman peaks were observed with a small blue and red shift, both of 1–3 cm(−1), as compared with those from the bulk, indicating the presence of internal strain and defects in the as-grown β-Ga(2)O(3) nanostructures. Strong photoluminescence emission in the UV-blue spectral region was obtained in the β-Ga(2)O(3) nanostructures, regardless of their morphology. The UV (374–377 nm) emission is due to the intrinsic radiative recombination of self-trapped excitons present at the band edge. The strong blue (404–490 nm) emissions, consisting of five bands, are attributed to the presence of the complex defect states in the donor (V(O)) and acceptor (V(Ga) or V(Ga–O)). These β-Ga(2)O(3) nanostructures are expected to have potential applications in optoelectronic devices such as tunable UV–Vis photodetectors. MDPI 2022-07-28 /pmc/articles/PMC9370184/ /pubmed/35957023 http://dx.doi.org/10.3390/nano12152589 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Yadav, Asha Fu, Bo Bonvicini, Stephanie Nicole Ly, Linh Quy Jia, Zhitai Shi, Yujun β-Ga(2)O(3) Nanostructures: Chemical Vapor Deposition Growth Using Thermally Dewetted Au Nanoparticles as Catalyst and Characterization |
title | β-Ga(2)O(3) Nanostructures: Chemical Vapor Deposition Growth Using Thermally Dewetted Au Nanoparticles as Catalyst and Characterization |
title_full | β-Ga(2)O(3) Nanostructures: Chemical Vapor Deposition Growth Using Thermally Dewetted Au Nanoparticles as Catalyst and Characterization |
title_fullStr | β-Ga(2)O(3) Nanostructures: Chemical Vapor Deposition Growth Using Thermally Dewetted Au Nanoparticles as Catalyst and Characterization |
title_full_unstemmed | β-Ga(2)O(3) Nanostructures: Chemical Vapor Deposition Growth Using Thermally Dewetted Au Nanoparticles as Catalyst and Characterization |
title_short | β-Ga(2)O(3) Nanostructures: Chemical Vapor Deposition Growth Using Thermally Dewetted Au Nanoparticles as Catalyst and Characterization |
title_sort | β-ga(2)o(3) nanostructures: chemical vapor deposition growth using thermally dewetted au nanoparticles as catalyst and characterization |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9370184/ https://www.ncbi.nlm.nih.gov/pubmed/35957023 http://dx.doi.org/10.3390/nano12152589 |
work_keys_str_mv | AT yadavasha bga2o3nanostructureschemicalvapordepositiongrowthusingthermallydewettedaunanoparticlesascatalystandcharacterization AT fubo bga2o3nanostructureschemicalvapordepositiongrowthusingthermallydewettedaunanoparticlesascatalystandcharacterization AT bonvicinistephanienicole bga2o3nanostructureschemicalvapordepositiongrowthusingthermallydewettedaunanoparticlesascatalystandcharacterization AT lylinhquy bga2o3nanostructureschemicalvapordepositiongrowthusingthermallydewettedaunanoparticlesascatalystandcharacterization AT jiazhitai bga2o3nanostructureschemicalvapordepositiongrowthusingthermallydewettedaunanoparticlesascatalystandcharacterization AT shiyujun bga2o3nanostructureschemicalvapordepositiongrowthusingthermallydewettedaunanoparticlesascatalystandcharacterization |