Optimization, Yield Studies and Morphology of WO<sub>3</sub>Nano-Wires Synthesized by Laser Pyrolysis in C<sub>2</sub>H<sub>2</sub>and O<sub>2</sub>Ambients—Validation of a New Growth Mechanism
<p>Abstract</p> <p>Laser pyrolysis has been used to synthesize WO<sub>3</sub>nanostructures. Spherical nano-particles were obtained when acetylene was used to carry the precursor droplet, whereas thin films were obtained at high flow-rates of oxygen carrier gas. In both...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2008-01-01
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| Series: | Nanoscale Research Letters |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1007/s11671-008-9169-6 |
| _version_ | 1827882601152512000 |
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| author | Sideras-Haddad E Forbes A Mwakikunga BW Arendse C |
| author_facet | Sideras-Haddad E Forbes A Mwakikunga BW Arendse C |
| author_sort | Sideras-Haddad E |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Laser pyrolysis has been used to synthesize WO<sub>3</sub>nanostructures. Spherical nano-particles were obtained when acetylene was used to carry the precursor droplet, whereas thin films were obtained at high flow-rates of oxygen carrier gas. In both environments WO<sub>3</sub>nano-wires appear only after thermal annealing of the as-deposited powders and films. Samples produced under oxygen carrier gas in the laser pyrolysis system gave a higher yield of WO<sub>3</sub>nano-wires after annealing than the samples which were run under acetylene carrier gas. Alongside the targeted nano-wires, the acetylene-ran samples showed trace amounts of multi-walled carbon nano-tubes; such carbon nano-tubes are not seen in the oxygen-processed WO<sub>3</sub>nano-wires. The solid–vapour–solid (SVS) mechanism [B. Mwakikunga et al., J. Nanosci. Nanotechnol., 2008] was found to be the possible mechanism that explains the manner of growth of the nano-wires. This model, based on the theory from basic statistical mechanics has herein been validated by length-diameter data for the produced WO<sub>3</sub>nano-wires.</p> |
| first_indexed | 2024-03-12T19:00:04Z |
| format | Article |
| id | doaj.art-2897bfbbc0a24b01bd661aaf0194db51 |
| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T19:00:04Z |
| publishDate | 2008-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nanoscale Research Letters |
| spelling | doaj.art-2897bfbbc0a24b01bd661aaf0194db512023-08-02T06:40:55ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2008-01-01310372380Optimization, Yield Studies and Morphology of WO<sub>3</sub>Nano-Wires Synthesized by Laser Pyrolysis in C<sub>2</sub>H<sub>2</sub>and O<sub>2</sub>Ambients—Validation of a New Growth MechanismSideras-Haddad EForbes AMwakikunga BWArendse C<p>Abstract</p> <p>Laser pyrolysis has been used to synthesize WO<sub>3</sub>nanostructures. Spherical nano-particles were obtained when acetylene was used to carry the precursor droplet, whereas thin films were obtained at high flow-rates of oxygen carrier gas. In both environments WO<sub>3</sub>nano-wires appear only after thermal annealing of the as-deposited powders and films. Samples produced under oxygen carrier gas in the laser pyrolysis system gave a higher yield of WO<sub>3</sub>nano-wires after annealing than the samples which were run under acetylene carrier gas. Alongside the targeted nano-wires, the acetylene-ran samples showed trace amounts of multi-walled carbon nano-tubes; such carbon nano-tubes are not seen in the oxygen-processed WO<sub>3</sub>nano-wires. The solid–vapour–solid (SVS) mechanism [B. Mwakikunga et al., J. Nanosci. Nanotechnol., 2008] was found to be the possible mechanism that explains the manner of growth of the nano-wires. This model, based on the theory from basic statistical mechanics has herein been validated by length-diameter data for the produced WO<sub>3</sub>nano-wires.</p>http://dx.doi.org/10.1007/s11671-008-9169-6Laser pyrolysisTungsten trioxideNano-wiresGrowth mechanism |
| spellingShingle | Sideras-Haddad E Forbes A Mwakikunga BW Arendse C Optimization, Yield Studies and Morphology of WO<sub>3</sub>Nano-Wires Synthesized by Laser Pyrolysis in C<sub>2</sub>H<sub>2</sub>and O<sub>2</sub>Ambients—Validation of a New Growth Mechanism Nanoscale Research Letters Laser pyrolysis Tungsten trioxide Nano-wires Growth mechanism |
| title | Optimization, Yield Studies and Morphology of WO<sub>3</sub>Nano-Wires Synthesized by Laser Pyrolysis in C<sub>2</sub>H<sub>2</sub>and O<sub>2</sub>Ambients—Validation of a New Growth Mechanism |
| title_full | Optimization, Yield Studies and Morphology of WO<sub>3</sub>Nano-Wires Synthesized by Laser Pyrolysis in C<sub>2</sub>H<sub>2</sub>and O<sub>2</sub>Ambients—Validation of a New Growth Mechanism |
| title_fullStr | Optimization, Yield Studies and Morphology of WO<sub>3</sub>Nano-Wires Synthesized by Laser Pyrolysis in C<sub>2</sub>H<sub>2</sub>and O<sub>2</sub>Ambients—Validation of a New Growth Mechanism |
| title_full_unstemmed | Optimization, Yield Studies and Morphology of WO<sub>3</sub>Nano-Wires Synthesized by Laser Pyrolysis in C<sub>2</sub>H<sub>2</sub>and O<sub>2</sub>Ambients—Validation of a New Growth Mechanism |
| title_short | Optimization, Yield Studies and Morphology of WO<sub>3</sub>Nano-Wires Synthesized by Laser Pyrolysis in C<sub>2</sub>H<sub>2</sub>and O<sub>2</sub>Ambients—Validation of a New Growth Mechanism |
| title_sort | optimization yield studies and morphology of wo sub 3 sub nano wires synthesized by laser pyrolysis in c sub 2 sub h sub 2 sub and o sub 2 sub ambients 8212 validation of a new growth mechanism |
| topic | Laser pyrolysis Tungsten trioxide Nano-wires Growth mechanism |
| url | http://dx.doi.org/10.1007/s11671-008-9169-6 |
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