Hierarchical ZnO nanostructures: Growth mechanisms and surface correlated photoluminescence

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ZnO nanowires were grown by vapor-transport and deposition on Au nanocluster covered fused and thermal silica and c-Si. The nanowire size and density depended strongly on the substrate type. By decreasing the O 2 to local Zn partial pressure ratio, the growth pattern changed to nanocombs and nanoshe...

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Autores principales:	Grinblat, G., Capeluto, M.G., Tirado, M., Bragas, A.V., Comedi, D.
Formato:	JOUR
Materias:	Au nanoclusters Exciton photoluminescences Growth mechanisms Growth patterns Morphology changes Nanocombs Partial pressure ratio Substrate types Two-dimensional growth ZnO ZnO nanostructures ZnO nanowires Fused silica Nanowires Photoluminescence Silicon Vapors Zinc oxide
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00036951_v100_n23_p_Grinblat
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00036951_v100_n23_p_Grinblat
record_format	dspace
spelling	todo:paper_00036951_v100_n23_p_Grinblat2023-10-03T13:56:32Z Hierarchical ZnO nanostructures: Growth mechanisms and surface correlated photoluminescence Grinblat, G. Capeluto, M.G. Tirado, M. Bragas, A.V. Comedi, D. Au nanoclusters Exciton photoluminescences Growth mechanisms Growth patterns Morphology changes Nanocombs Partial pressure ratio Substrate types Two-dimensional growth ZnO ZnO nanostructures ZnO nanowires Fused silica Nanowires Photoluminescence Silicon Vapors Zinc oxide ZnO nanowires were grown by vapor-transport and deposition on Au nanocluster covered fused and thermal silica and c-Si. The nanowire size and density depended strongly on the substrate type. By decreasing the O 2 to local Zn partial pressure ratio, the growth pattern changed to nanocombs and nanosheets. ZnO nanohedgehogs were found on bare c-Si. We observe a remarkable correlation between the defect to exciton photoluminescence intensity ratio and the nanostructures specific surface areas. These results indicate that changes in strain and O deficiency defects at surfaces are behind the observed morphology changes, one to two-dimensional growth transition, and corresponding luminescence. © 2012 American Institute of Physics. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00036951_v100_n23_p_Grinblat
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Au nanoclusters Exciton photoluminescences Growth mechanisms Growth patterns Morphology changes Nanocombs Partial pressure ratio Substrate types Two-dimensional growth ZnO ZnO nanostructures ZnO nanowires Fused silica Nanowires Photoluminescence Silicon Vapors Zinc oxide
spellingShingle	Au nanoclusters Exciton photoluminescences Growth mechanisms Growth patterns Morphology changes Nanocombs Partial pressure ratio Substrate types Two-dimensional growth ZnO ZnO nanostructures ZnO nanowires Fused silica Nanowires Photoluminescence Silicon Vapors Zinc oxide Grinblat, G. Capeluto, M.G. Tirado, M. Bragas, A.V. Comedi, D. Hierarchical ZnO nanostructures: Growth mechanisms and surface correlated photoluminescence
topic_facet	Au nanoclusters Exciton photoluminescences Growth mechanisms Growth patterns Morphology changes Nanocombs Partial pressure ratio Substrate types Two-dimensional growth ZnO ZnO nanostructures ZnO nanowires Fused silica Nanowires Photoluminescence Silicon Vapors Zinc oxide
description	ZnO nanowires were grown by vapor-transport and deposition on Au nanocluster covered fused and thermal silica and c-Si. The nanowire size and density depended strongly on the substrate type. By decreasing the O 2 to local Zn partial pressure ratio, the growth pattern changed to nanocombs and nanosheets. ZnO nanohedgehogs were found on bare c-Si. We observe a remarkable correlation between the defect to exciton photoluminescence intensity ratio and the nanostructures specific surface areas. These results indicate that changes in strain and O deficiency defects at surfaces are behind the observed morphology changes, one to two-dimensional growth transition, and corresponding luminescence. © 2012 American Institute of Physics.
format	JOUR
author	Grinblat, G. Capeluto, M.G. Tirado, M. Bragas, A.V. Comedi, D.
author_facet	Grinblat, G. Capeluto, M.G. Tirado, M. Bragas, A.V. Comedi, D.
author_sort	Grinblat, G.
title	Hierarchical ZnO nanostructures: Growth mechanisms and surface correlated photoluminescence
title_short	Hierarchical ZnO nanostructures: Growth mechanisms and surface correlated photoluminescence
title_full	Hierarchical ZnO nanostructures: Growth mechanisms and surface correlated photoluminescence
title_fullStr	Hierarchical ZnO nanostructures: Growth mechanisms and surface correlated photoluminescence
title_full_unstemmed	Hierarchical ZnO nanostructures: Growth mechanisms and surface correlated photoluminescence
title_sort	hierarchical zno nanostructures: growth mechanisms and surface correlated photoluminescence
url	http://hdl.handle.net/20.500.12110/paper_00036951_v100_n23_p_Grinblat
work_keys_str_mv	AT grinblatg hierarchicalznonanostructuresgrowthmechanismsandsurfacecorrelatedphotoluminescence AT capelutomg hierarchicalznonanostructuresgrowthmechanismsandsurfacecorrelatedphotoluminescence AT tiradom hierarchicalznonanostructuresgrowthmechanismsandsurfacecorrelatedphotoluminescence AT bragasav hierarchicalznonanostructuresgrowthmechanismsandsurfacecorrelatedphotoluminescence AT comedid hierarchicalznonanostructuresgrowthmechanismsandsurfacecorrelatedphotoluminescence
_version_	1807316054514335744

Hierarchical ZnO nanostructures: Growth mechanisms and surface correlated photoluminescence

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