Chemical sensing investigations on Zn–In2O3 nanowires
This work illustrates the sensing behavior of Zn-doped and undoped In2O3 nanowires toward pollutant gases. An enhanced sensor response to reducing gases (e.g. H2, CO and ethanol) from indium zinc oxide (IZO) nanowires in comparison to In2O3 nanowires is obtained. Zn-doping increases the oxygen vacan...
| Autores principales: | , , , |
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| Otros Autores: | |
| Formato: | Journal Article |
| Lenguaje: | English |
| Publicado: |
2013
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10356/97834 http://hdl.handle.net/10220/12097 |
| _version_ | 1826112797132455936 |
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| author | Singh, Nandan Ponzoni, Andrea Comini, Elisabetta Lee, Pooi See |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Singh, Nandan Ponzoni, Andrea Comini, Elisabetta Lee, Pooi See |
| author_sort | Singh, Nandan |
| collection | NTU |
| description | This work illustrates the sensing behavior of Zn-doped and undoped In2O3 nanowires toward pollutant gases. An enhanced sensor response to reducing gases (e.g. H2, CO and ethanol) from indium zinc oxide (IZO) nanowires in comparison to In2O3 nanowires is obtained. Zn-doping increases the oxygen vacancies which enhance the oxygen ion adsorption on the nanowire surface. These adsorbed oxygen ions enhance the sensor responses for CO (from 4.5 to 21.5 for 400 ppm), H2 (from 4.7 to 32.5 for 4000 ppm) and ethanol (from 3.5 to 60 for 100 ppm). On the other hand, the sensor response for NO2 reduces (from 17.5 to 6.5 for 1 ppm NO2) after Zn-doping. Opposing temperature dependent sensor response from IZO nanowires toward NO2 is observed at higher temperature (above 300 °C). This is attributed to the downshift in the Fermi level of IZO due to dissociative NO2 interaction at higher working temperatures which produces oxygen ions that diffuse into the nanowire. |
| first_indexed | 2024-10-01T03:12:59Z |
| format | Journal Article |
| id | ntu-10356/97834 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:12:59Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/978342020-06-01T10:01:40Z Chemical sensing investigations on Zn–In2O3 nanowires Singh, Nandan Ponzoni, Andrea Comini, Elisabetta Lee, Pooi See School of Materials Science & Engineering DRNTU::Engineering::Materials This work illustrates the sensing behavior of Zn-doped and undoped In2O3 nanowires toward pollutant gases. An enhanced sensor response to reducing gases (e.g. H2, CO and ethanol) from indium zinc oxide (IZO) nanowires in comparison to In2O3 nanowires is obtained. Zn-doping increases the oxygen vacancies which enhance the oxygen ion adsorption on the nanowire surface. These adsorbed oxygen ions enhance the sensor responses for CO (from 4.5 to 21.5 for 400 ppm), H2 (from 4.7 to 32.5 for 4000 ppm) and ethanol (from 3.5 to 60 for 100 ppm). On the other hand, the sensor response for NO2 reduces (from 17.5 to 6.5 for 1 ppm NO2) after Zn-doping. Opposing temperature dependent sensor response from IZO nanowires toward NO2 is observed at higher temperature (above 300 °C). This is attributed to the downshift in the Fermi level of IZO due to dissociative NO2 interaction at higher working temperatures which produces oxygen ions that diffuse into the nanowire. 2013-07-24T03:59:49Z 2019-12-06T19:47:12Z 2013-07-24T03:59:49Z 2019-12-06T19:47:12Z 2012 2012 Journal Article Singh, N., Ponzoni, A., Comini, E., & Lee, P. S. (2012). Chemical sensing investigations on Zn–In2O3 nanowires. Sensors and Actuators B: Chemical, 171-172, 244-248. 0925-4005 https://hdl.handle.net/10356/97834 http://hdl.handle.net/10220/12097 10.1016/j.snb.2012.03.054 en Sensors and actuators B: chemical © 2012 Elsevier B.V. |
| spellingShingle | DRNTU::Engineering::Materials Singh, Nandan Ponzoni, Andrea Comini, Elisabetta Lee, Pooi See Chemical sensing investigations on Zn–In2O3 nanowires |
| title | Chemical sensing investigations on Zn–In2O3 nanowires |
| title_full | Chemical sensing investigations on Zn–In2O3 nanowires |
| title_fullStr | Chemical sensing investigations on Zn–In2O3 nanowires |
| title_full_unstemmed | Chemical sensing investigations on Zn–In2O3 nanowires |
| title_short | Chemical sensing investigations on Zn–In2O3 nanowires |
| title_sort | chemical sensing investigations on zn in2o3 nanowires |
| topic | DRNTU::Engineering::Materials |
| url | https://hdl.handle.net/10356/97834 http://hdl.handle.net/10220/12097 |
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