Sputtered SnO<sub>2</sub>/ZnO Heterostructures for Improved NO<sub>2</sub> Gas Sensing Properties
A highly sensitive and selective NO<sub>2</sub> gas sensor dependent on SnO<sub>2</sub>/ZnO heterostructures was fabricated using a sputtering process. The SnO<sub>2</sub>/ZnO heterostructure thin film samples were characterized by field emission scanning electron...
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| Format: | Article |
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MDPI AG
2020-08-01
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| Series: | Chemosensors |
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| Online Access: | https://www.mdpi.com/2227-9040/8/3/67 |
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| author | Bharat Sharma Ashutosh Sharma Monika Joshi Jae-ha Myung |
| author_facet | Bharat Sharma Ashutosh Sharma Monika Joshi Jae-ha Myung |
| author_sort | Bharat Sharma |
| collection | DOAJ |
| description | A highly sensitive and selective NO<sub>2</sub> gas sensor dependent on SnO<sub>2</sub>/ZnO heterostructures was fabricated using a sputtering process. The SnO<sub>2</sub>/ZnO heterostructure thin film samples were characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). Sensors fabricated with heterostructures attained higher gas response (S = 66.9) and quicker response-recovery (20 s, 45 s) characteristics at 100 °C operating temperature towards 100 ppm NO<sub>2</sub> gas efficiently in comparison to sensors based on their mono-counterparts. The selectivity and stability of SnO<sub>2</sub>/ZnO heterostructures were studied. The more desirable sensing mechanism of SnO<sub>2</sub>/ZnO heterostructures towards NO<sub>2</sub> was described in detail. |
| first_indexed | 2024-03-10T17:49:01Z |
| format | Article |
| id | doaj.art-8f91769582ca4c039b94c6bd7ff283d9 |
| institution | Directory Open Access Journal |
| issn | 2227-9040 |
| language | English |
| last_indexed | 2024-03-10T17:49:01Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Chemosensors |
| spelling | doaj.art-8f91769582ca4c039b94c6bd7ff283d92023-11-20T09:25:36ZengMDPI AGChemosensors2227-90402020-08-01836710.3390/chemosensors8030067Sputtered SnO<sub>2</sub>/ZnO Heterostructures for Improved NO<sub>2</sub> Gas Sensing PropertiesBharat Sharma0Ashutosh Sharma1Monika Joshi2Jae-ha Myung3Department of Materials Science and Engineering, Incheon National University, Incheon 22012, KoreaDepartment of Materials Science and Engineering and Department of Energy Systems Research, 206-Worldcup-ro, Yeongtong-gu, Suwon 16499, Gyeonggi-do, KoreaAmity Institute of Nanotechnology, Amity University, Noida, Uttar Pradesh 201313, IndiaDepartment of Materials Science and Engineering, Incheon National University, Incheon 22012, KoreaA highly sensitive and selective NO<sub>2</sub> gas sensor dependent on SnO<sub>2</sub>/ZnO heterostructures was fabricated using a sputtering process. The SnO<sub>2</sub>/ZnO heterostructure thin film samples were characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). Sensors fabricated with heterostructures attained higher gas response (S = 66.9) and quicker response-recovery (20 s, 45 s) characteristics at 100 °C operating temperature towards 100 ppm NO<sub>2</sub> gas efficiently in comparison to sensors based on their mono-counterparts. The selectivity and stability of SnO<sub>2</sub>/ZnO heterostructures were studied. The more desirable sensing mechanism of SnO<sub>2</sub>/ZnO heterostructures towards NO<sub>2</sub> was described in detail.https://www.mdpi.com/2227-9040/8/3/67SnO<sub>2</sub>/ZnOheterostructuresNO<sub>2</sub> gasMOSsensing mechanism |
| spellingShingle | Bharat Sharma Ashutosh Sharma Monika Joshi Jae-ha Myung Sputtered SnO<sub>2</sub>/ZnO Heterostructures for Improved NO<sub>2</sub> Gas Sensing Properties Chemosensors SnO<sub>2</sub>/ZnO heterostructures NO<sub>2</sub> gas MOS sensing mechanism |
| title | Sputtered SnO<sub>2</sub>/ZnO Heterostructures for Improved NO<sub>2</sub> Gas Sensing Properties |
| title_full | Sputtered SnO<sub>2</sub>/ZnO Heterostructures for Improved NO<sub>2</sub> Gas Sensing Properties |
| title_fullStr | Sputtered SnO<sub>2</sub>/ZnO Heterostructures for Improved NO<sub>2</sub> Gas Sensing Properties |
| title_full_unstemmed | Sputtered SnO<sub>2</sub>/ZnO Heterostructures for Improved NO<sub>2</sub> Gas Sensing Properties |
| title_short | Sputtered SnO<sub>2</sub>/ZnO Heterostructures for Improved NO<sub>2</sub> Gas Sensing Properties |
| title_sort | sputtered sno sub 2 sub zno heterostructures for improved no sub 2 sub gas sensing properties |
| topic | SnO<sub>2</sub>/ZnO heterostructures NO<sub>2</sub> gas MOS sensing mechanism |
| url | https://www.mdpi.com/2227-9040/8/3/67 |
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