Phase separation induced by Au catalysts in ternary InGaAs nanowires.
We report a novel phase separation phenomenon observed in the growth of ternary In(x)Ga(1-x)As nanowires by metalorganic chemical vapor deposition. A spontaneous formation of core-shell nanowires is investigated by cross-sectional transmission electron microscopy, revealing the compositional complex...
| Main Authors: | , , , , , , , , , , , , |
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| 格式: | Journal article |
| 语言: | English |
| 出版: |
2013
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| _version_ | 1826265181235183616 |
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| author | Guo, Y Xu, H Auchterlonie, G Burgess, T Joyce, H Gao, Q Tan, H Jagadish, C Shu, H Chen, X Lu, W Kim, Y Zou, J |
| author_facet | Guo, Y Xu, H Auchterlonie, G Burgess, T Joyce, H Gao, Q Tan, H Jagadish, C Shu, H Chen, X Lu, W Kim, Y Zou, J |
| author_sort | Guo, Y |
| collection | OXFORD |
| description | We report a novel phase separation phenomenon observed in the growth of ternary In(x)Ga(1-x)As nanowires by metalorganic chemical vapor deposition. A spontaneous formation of core-shell nanowires is investigated by cross-sectional transmission electron microscopy, revealing the compositional complexity within the ternary nanowires. It has been found that for In(x)Ga(1-x)As nanowires high precursor flow rates generate ternary In(x)Ga(1-x)As cores with In-rich shells, while low precursor flow rates produce binary GaAs cores with ternary In(x)Ga(1-x)As shells. First-principle calculations combined with thermodynamic considerations suggest that this phenomenon is due to competitive alloying of different group-III elements with Au catalysts, and variations in elemental concentrations of group-III materials in the catalyst under different precursor flow rates. This study shows that precursor flow rates are critical factors for manipulating Au catalysts to produce nanowires of desired composition. |
| first_indexed | 2024-03-06T20:19:37Z |
| format | Journal article |
| id | oxford-uuid:2d5753fb-e4b7-4fe7-aaf5-38a0fb108d1d |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:19:37Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | oxford-uuid:2d5753fb-e4b7-4fe7-aaf5-38a0fb108d1d2022-03-26T12:42:24ZPhase separation induced by Au catalysts in ternary InGaAs nanowires.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:2d5753fb-e4b7-4fe7-aaf5-38a0fb108d1dEnglishSymplectic Elements at Oxford2013Guo, YXu, HAuchterlonie, GBurgess, TJoyce, HGao, QTan, HJagadish, CShu, HChen, XLu, WKim, YZou, JWe report a novel phase separation phenomenon observed in the growth of ternary In(x)Ga(1-x)As nanowires by metalorganic chemical vapor deposition. A spontaneous formation of core-shell nanowires is investigated by cross-sectional transmission electron microscopy, revealing the compositional complexity within the ternary nanowires. It has been found that for In(x)Ga(1-x)As nanowires high precursor flow rates generate ternary In(x)Ga(1-x)As cores with In-rich shells, while low precursor flow rates produce binary GaAs cores with ternary In(x)Ga(1-x)As shells. First-principle calculations combined with thermodynamic considerations suggest that this phenomenon is due to competitive alloying of different group-III elements with Au catalysts, and variations in elemental concentrations of group-III materials in the catalyst under different precursor flow rates. This study shows that precursor flow rates are critical factors for manipulating Au catalysts to produce nanowires of desired composition. |
| spellingShingle | Guo, Y Xu, H Auchterlonie, G Burgess, T Joyce, H Gao, Q Tan, H Jagadish, C Shu, H Chen, X Lu, W Kim, Y Zou, J Phase separation induced by Au catalysts in ternary InGaAs nanowires. |
| title | Phase separation induced by Au catalysts in ternary InGaAs nanowires. |
| title_full | Phase separation induced by Au catalysts in ternary InGaAs nanowires. |
| title_fullStr | Phase separation induced by Au catalysts in ternary InGaAs nanowires. |
| title_full_unstemmed | Phase separation induced by Au catalysts in ternary InGaAs nanowires. |
| title_short | Phase separation induced by Au catalysts in ternary InGaAs nanowires. |
| title_sort | phase separation induced by au catalysts in ternary ingaas nanowires |
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