Influence of the spray pyrolysis seeding and growth parameters on the structure and optical properties of ZnO nanorod arrays
ZnO nanorods (NRs) were grown on fluorine doped tin oxide (FTO) substrates at low temperatures (90 °C) from Zn 2+ precursors in alkaline media previously seeded with ZnO nanoparticles. These were deposited onto the FTO substrate heated at 350 °C by spray pyrolysis of a Zn acetate solution in a water...
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paper:paper_02540584_v151_n_p378_Rodriguez2023-06-08T15:21:57Z Influence of the spray pyrolysis seeding and growth parameters on the structure and optical properties of ZnO nanorod arrays Onna, Diego Ariel Marchi, María Claudia Chemical synthesis Nanostructures Optical properties Semiconductors Thin films Vapour deposition Alkalinity Cathodoluminescence Deposition Ethanol Film growth Mixtures Nanocomposites Nanorods Nanostructures Organic solvents Scanning electron microscopy Semiconductor materials Spray pyrolysis Stacking faults Substrates Synthesis (chemical) Thin films Tin oxides X ray diffraction Zinc Zinc oxide Zinc sulfide Cathodoluminescence spectroscopy Deep level emission Fluorine doped tin oxide Near band edge emissions Solvent evaporation UV-visible absorption Vapour deposition Water ethanol mixtures Optical properties ZnO nanorods (NRs) were grown on fluorine doped tin oxide (FTO) substrates at low temperatures (90 °C) from Zn 2+ precursors in alkaline media previously seeded with ZnO nanoparticles. These were deposited onto the FTO substrate heated at 350 °C by spray pyrolysis of a Zn acetate solution in a water ethanol mixture. The structure of seeds was tuned by the ethanol to water ratio, Γ, which controls the solvent evaporation rate of drops impinging the substrate. From a detailed characterization using a combination of scanning electron microscopy, X-ray diffraction, UV-visible absorption and cathodoluminescence spectroscopies, the dependence of the morphology and optical properties of the ZnO NRs on the seeding conditions was demonstrated. NRs grown on seeds deposited from solutions with Γ in the 0.03-0.06 range - i.e. when the surface excess of ethanol in the water-ethanol mixture has a maximum - show thinner average diameters and stacking faults due to the presence of zinc blende domains embedded into an overall wurtzite NR. They furthermore exhibit blue-shifted near band edge emission peak and a high deep level emission in cathodoluminescence. All these findings support the use of spray pyrolysis as a simple and reproducible way to control the seeds deposition, influencing the growth, the structure and the optical properties of the final ZnO NRs. Fil:Onna, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Marchi, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02540584_v151_n_p378_Rodriguez http://hdl.handle.net/20.500.12110/paper_02540584_v151_n_p378_Rodriguez |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Chemical synthesis Nanostructures Optical properties Semiconductors Thin films Vapour deposition Alkalinity Cathodoluminescence Deposition Ethanol Film growth Mixtures Nanocomposites Nanorods Nanostructures Organic solvents Scanning electron microscopy Semiconductor materials Spray pyrolysis Stacking faults Substrates Synthesis (chemical) Thin films Tin oxides X ray diffraction Zinc Zinc oxide Zinc sulfide Cathodoluminescence spectroscopy Deep level emission Fluorine doped tin oxide Near band edge emissions Solvent evaporation UV-visible absorption Vapour deposition Water ethanol mixtures Optical properties |
| spellingShingle |
Chemical synthesis Nanostructures Optical properties Semiconductors Thin films Vapour deposition Alkalinity Cathodoluminescence Deposition Ethanol Film growth Mixtures Nanocomposites Nanorods Nanostructures Organic solvents Scanning electron microscopy Semiconductor materials Spray pyrolysis Stacking faults Substrates Synthesis (chemical) Thin films Tin oxides X ray diffraction Zinc Zinc oxide Zinc sulfide Cathodoluminescence spectroscopy Deep level emission Fluorine doped tin oxide Near band edge emissions Solvent evaporation UV-visible absorption Vapour deposition Water ethanol mixtures Optical properties Onna, Diego Ariel Marchi, María Claudia Influence of the spray pyrolysis seeding and growth parameters on the structure and optical properties of ZnO nanorod arrays |
| topic_facet |
Chemical synthesis Nanostructures Optical properties Semiconductors Thin films Vapour deposition Alkalinity Cathodoluminescence Deposition Ethanol Film growth Mixtures Nanocomposites Nanorods Nanostructures Organic solvents Scanning electron microscopy Semiconductor materials Spray pyrolysis Stacking faults Substrates Synthesis (chemical) Thin films Tin oxides X ray diffraction Zinc Zinc oxide Zinc sulfide Cathodoluminescence spectroscopy Deep level emission Fluorine doped tin oxide Near band edge emissions Solvent evaporation UV-visible absorption Vapour deposition Water ethanol mixtures Optical properties |
| description |
ZnO nanorods (NRs) were grown on fluorine doped tin oxide (FTO) substrates at low temperatures (90 °C) from Zn 2+ precursors in alkaline media previously seeded with ZnO nanoparticles. These were deposited onto the FTO substrate heated at 350 °C by spray pyrolysis of a Zn acetate solution in a water ethanol mixture. The structure of seeds was tuned by the ethanol to water ratio, Γ, which controls the solvent evaporation rate of drops impinging the substrate. From a detailed characterization using a combination of scanning electron microscopy, X-ray diffraction, UV-visible absorption and cathodoluminescence spectroscopies, the dependence of the morphology and optical properties of the ZnO NRs on the seeding conditions was demonstrated. NRs grown on seeds deposited from solutions with Γ in the 0.03-0.06 range - i.e. when the surface excess of ethanol in the water-ethanol mixture has a maximum - show thinner average diameters and stacking faults due to the presence of zinc blende domains embedded into an overall wurtzite NR. They furthermore exhibit blue-shifted near band edge emission peak and a high deep level emission in cathodoluminescence. All these findings support the use of spray pyrolysis as a simple and reproducible way to control the seeds deposition, influencing the growth, the structure and the optical properties of the final ZnO NRs. |
| author |
Onna, Diego Ariel Marchi, María Claudia |
| author_facet |
Onna, Diego Ariel Marchi, María Claudia |
| author_sort |
Onna, Diego Ariel |
| title |
Influence of the spray pyrolysis seeding and growth parameters on the structure and optical properties of ZnO nanorod arrays |
| title_short |
Influence of the spray pyrolysis seeding and growth parameters on the structure and optical properties of ZnO nanorod arrays |
| title_full |
Influence of the spray pyrolysis seeding and growth parameters on the structure and optical properties of ZnO nanorod arrays |
| title_fullStr |
Influence of the spray pyrolysis seeding and growth parameters on the structure and optical properties of ZnO nanorod arrays |
| title_full_unstemmed |
Influence of the spray pyrolysis seeding and growth parameters on the structure and optical properties of ZnO nanorod arrays |
| title_sort |
influence of the spray pyrolysis seeding and growth parameters on the structure and optical properties of zno nanorod arrays |
| publishDate |
2015 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02540584_v151_n_p378_Rodriguez http://hdl.handle.net/20.500.12110/paper_02540584_v151_n_p378_Rodriguez |
| work_keys_str_mv |
AT onnadiegoariel influenceofthespraypyrolysisseedingandgrowthparametersonthestructureandopticalpropertiesofznonanorodarrays AT marchimariaclaudia influenceofthespraypyrolysisseedingandgrowthparametersonthestructureandopticalpropertiesofznonanorodarrays |
| _version_ |
1768546538299064320 |