Defect-Free GaAs/AlGaAs Core-Shell Nanowires on Si Substrates
We report straight and vertically aligned defect-free GaAs nanowires grown on Si(111) substrates by metal-organic chemical vapor deposition. By deposition of thin GaAs buffer layers on Si substrates, these nanowires could be grown on the buffer layers with much less stringent conditions as otherwise...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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2011
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| _version_ | 1797087101669343232 |
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| author | Kang, J Gao, Q Joyce, H Tan, H Jagadish, C Kim, Y Guo, Y Xu, H Zou, J Fickenscher, M Smith, L Jackson, H Yarrison-Rice, J |
| author_facet | Kang, J Gao, Q Joyce, H Tan, H Jagadish, C Kim, Y Guo, Y Xu, H Zou, J Fickenscher, M Smith, L Jackson, H Yarrison-Rice, J |
| author_sort | Kang, J |
| collection | OXFORD |
| description | We report straight and vertically aligned defect-free GaAs nanowires grown on Si(111) substrates by metal-organic chemical vapor deposition. By deposition of thin GaAs buffer layers on Si substrates, these nanowires could be grown on the buffer layers with much less stringent conditions as otherwise imposed by epitaxy of III-V compounds on Si. Also, crystal-defect-free GaAs nanowires were grown by using either a two-temperature growth mode consisting of a short initial nucleation step under higher temperature followed by subsequent growth under lower temperature or a rapid growth rate mode with high source flow rate. These two growth modes not only eliminated planar crystallographic defects but also significantly reduced tapering. Core-shell GaAs-AlGaAs nanowires grown by the two-temperature growth mode showed improved optical properties with strong photoluminescence and long carrier life times. © 2011 American Chemical Society. |
| first_indexed | 2024-03-07T02:31:19Z |
| format | Journal article |
| id | oxford-uuid:a7534ec1-c82f-49c0-b0d4-f126045b5b84 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:31:19Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | oxford-uuid:a7534ec1-c82f-49c0-b0d4-f126045b5b842022-03-27T02:53:56ZDefect-Free GaAs/AlGaAs Core-Shell Nanowires on Si SubstratesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a7534ec1-c82f-49c0-b0d4-f126045b5b84EnglishSymplectic Elements at Oxford2011Kang, JGao, QJoyce, HTan, HJagadish, CKim, YGuo, YXu, HZou, JFickenscher, MSmith, LJackson, HYarrison-Rice, JWe report straight and vertically aligned defect-free GaAs nanowires grown on Si(111) substrates by metal-organic chemical vapor deposition. By deposition of thin GaAs buffer layers on Si substrates, these nanowires could be grown on the buffer layers with much less stringent conditions as otherwise imposed by epitaxy of III-V compounds on Si. Also, crystal-defect-free GaAs nanowires were grown by using either a two-temperature growth mode consisting of a short initial nucleation step under higher temperature followed by subsequent growth under lower temperature or a rapid growth rate mode with high source flow rate. These two growth modes not only eliminated planar crystallographic defects but also significantly reduced tapering. Core-shell GaAs-AlGaAs nanowires grown by the two-temperature growth mode showed improved optical properties with strong photoluminescence and long carrier life times. © 2011 American Chemical Society. |
| spellingShingle | Kang, J Gao, Q Joyce, H Tan, H Jagadish, C Kim, Y Guo, Y Xu, H Zou, J Fickenscher, M Smith, L Jackson, H Yarrison-Rice, J Defect-Free GaAs/AlGaAs Core-Shell Nanowires on Si Substrates |
| title | Defect-Free GaAs/AlGaAs Core-Shell Nanowires on Si Substrates |
| title_full | Defect-Free GaAs/AlGaAs Core-Shell Nanowires on Si Substrates |
| title_fullStr | Defect-Free GaAs/AlGaAs Core-Shell Nanowires on Si Substrates |
| title_full_unstemmed | Defect-Free GaAs/AlGaAs Core-Shell Nanowires on Si Substrates |
| title_short | Defect-Free GaAs/AlGaAs Core-Shell Nanowires on Si Substrates |
| title_sort | defect free gaas algaas core shell nanowires on si substrates |
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