Effect of Tungsten Oxide Nanostructures on Sensitivity and Selectivity of Pollution Gases
We report on the different surface structures of tungsten oxides which have been synthesized using a simple post-annealing-free hot-filament CVD technique, including 0D nanoparticles (NPs), 1D nanorods (NRs), and 2D nanosheet assemblies of 3D hierarchical nanoflowers (NFs). The surface morphologies,...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-08-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/20/17/4801 |
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| author | Fenghui An Andrew F. Zhou Peter X. Feng |
| author_facet | Fenghui An Andrew F. Zhou Peter X. Feng |
| author_sort | Fenghui An |
| collection | DOAJ |
| description | We report on the different surface structures of tungsten oxides which have been synthesized using a simple post-annealing-free hot-filament CVD technique, including 0D nanoparticles (NPs), 1D nanorods (NRs), and 2D nanosheet assemblies of 3D hierarchical nanoflowers (NFs). The surface morphologies, crystalline structures, and material compositions have been characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and Raman spectroscopy, respectively. The sensor performances based on the synthesized samples of various surface morphologies have been investigated, as well as the influences of operating temperature and applied bias. The sensing property depends closely on the surface morphology, and the 3D hierarchical nanoflowers-based gas sensor offers the best sensitivity and fastest response time to NH<sub>3</sub> and CH<sub>3</sub> gases when operated at room temperature. |
| first_indexed | 2024-03-10T16:50:20Z |
| format | Article |
| id | doaj.art-fc5f879aafac4639ab3dc5ca7ddbcc0e |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T16:50:20Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-fc5f879aafac4639ab3dc5ca7ddbcc0e2023-11-20T11:21:33ZengMDPI AGSensors1424-82202020-08-012017480110.3390/s20174801Effect of Tungsten Oxide Nanostructures on Sensitivity and Selectivity of Pollution GasesFenghui An0Andrew F. Zhou1Peter X. Feng2School of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005, ChinaDepartment of Physics, Indiana University of Pennsylvania, Indiana, PA 15705, USADepartment of Physics, University of Puerto Rico, San Juan, PR 00936, USAWe report on the different surface structures of tungsten oxides which have been synthesized using a simple post-annealing-free hot-filament CVD technique, including 0D nanoparticles (NPs), 1D nanorods (NRs), and 2D nanosheet assemblies of 3D hierarchical nanoflowers (NFs). The surface morphologies, crystalline structures, and material compositions have been characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and Raman spectroscopy, respectively. The sensor performances based on the synthesized samples of various surface morphologies have been investigated, as well as the influences of operating temperature and applied bias. The sensing property depends closely on the surface morphology, and the 3D hierarchical nanoflowers-based gas sensor offers the best sensitivity and fastest response time to NH<sub>3</sub> and CH<sub>3</sub> gases when operated at room temperature.https://www.mdpi.com/1424-8220/20/17/4801tungsten trioxidesurface morphologygas sensorhot-filament CVD |
| spellingShingle | Fenghui An Andrew F. Zhou Peter X. Feng Effect of Tungsten Oxide Nanostructures on Sensitivity and Selectivity of Pollution Gases Sensors tungsten trioxide surface morphology gas sensor hot-filament CVD |
| title | Effect of Tungsten Oxide Nanostructures on Sensitivity and Selectivity of Pollution Gases |
| title_full | Effect of Tungsten Oxide Nanostructures on Sensitivity and Selectivity of Pollution Gases |
| title_fullStr | Effect of Tungsten Oxide Nanostructures on Sensitivity and Selectivity of Pollution Gases |
| title_full_unstemmed | Effect of Tungsten Oxide Nanostructures on Sensitivity and Selectivity of Pollution Gases |
| title_short | Effect of Tungsten Oxide Nanostructures on Sensitivity and Selectivity of Pollution Gases |
| title_sort | effect of tungsten oxide nanostructures on sensitivity and selectivity of pollution gases |
| topic | tungsten trioxide surface morphology gas sensor hot-filament CVD |
| url | https://www.mdpi.com/1424-8220/20/17/4801 |
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