Solid State Electronic Sensors for Detection of Carbon Dioxide
Detection of carbon dioxide (CO<sub>2</sub>) is very important for environmental, health, safety and space applications. We have studied novel multiwall carbon nanotubes (MWCNTs) and an iron oxide (Fe<sub>2</sub>O<sub>3</sub>) nanocomposite based chemiresistive se...
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doaj-926096db4a414b88bc1e48e386d26fbb2020-11-24T20:46:37ZengMDPI AGSensors1424-82202019-09-011918384810.3390/s19183848s19183848Solid State Electronic Sensors for Detection of Carbon DioxideAmi Hannon0Jing Li1KBR Wyle Inc. at NASA Ames Research Center, CA 94035, USANASA Ames Research Center, CA 94035, USADetection of carbon dioxide (CO<sub>2</sub>) is very important for environmental, health, safety and space applications. We have studied novel multiwall carbon nanotubes (MWCNTs) and an iron oxide (Fe<sub>2</sub>O<sub>3</sub>) nanocomposite based chemiresistive sensor for detection of CO<sub>2</sub> at room temperature. The sensor has been miniaturized to a chip size (1 cm × 2 cm). Good sensing performance was observed with a wide detection range of CO<sub>2</sub> concentrations (100−6000 ppm). Structural properties of the sensing materials were characterized using Field-Emission Scanning Electron Microscopy, Fourier-Transform Infrared and Raman spectroscopies. The greatly improved sensitivity of the composite materials to CO<sub>2</sub> can be attributed to the formation of a depletion layer at the p-n junction in an MWCNT/iron oxide heterostructure, and new CO<sub>2</sub> gas molecules adhere to the high surface area of MWCNTs due to the concentration gradient. The test results showed that the CO<sub>2</sub> sensor possesses fast response, compact size, ultra-low power consumption, high sensitivity and wide dynamic detection range.https://www.mdpi.com/1424-8220/19/18/3848carbon dioxide sensorCO<sub>2</sub> sensorgas sensorroom temperature gas sensingfunctionalized nanotubeselectronic nosesmartphone sensorchemiresistive sensornanocomposite |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ami Hannon Jing Li |
spellingShingle |
Ami Hannon Jing Li Solid State Electronic Sensors for Detection of Carbon Dioxide Sensors carbon dioxide sensor CO<sub>2</sub> sensor gas sensor room temperature gas sensing functionalized nanotubes electronic nose smartphone sensor chemiresistive sensor nanocomposite |
author_facet |
Ami Hannon Jing Li |
author_sort |
Ami Hannon |
title |
Solid State Electronic Sensors for Detection of Carbon Dioxide |
title_short |
Solid State Electronic Sensors for Detection of Carbon Dioxide |
title_full |
Solid State Electronic Sensors for Detection of Carbon Dioxide |
title_fullStr |
Solid State Electronic Sensors for Detection of Carbon Dioxide |
title_full_unstemmed |
Solid State Electronic Sensors for Detection of Carbon Dioxide |
title_sort |
solid state electronic sensors for detection of carbon dioxide |
publisher |
MDPI AG |
series |
Sensors |
issn |
1424-8220 |
publishDate |
2019-09-01 |
description |
Detection of carbon dioxide (CO<sub>2</sub>) is very important for environmental, health, safety and space applications. We have studied novel multiwall carbon nanotubes (MWCNTs) and an iron oxide (Fe<sub>2</sub>O<sub>3</sub>) nanocomposite based chemiresistive sensor for detection of CO<sub>2</sub> at room temperature. The sensor has been miniaturized to a chip size (1 cm × 2 cm). Good sensing performance was observed with a wide detection range of CO<sub>2</sub> concentrations (100−6000 ppm). Structural properties of the sensing materials were characterized using Field-Emission Scanning Electron Microscopy, Fourier-Transform Infrared and Raman spectroscopies. The greatly improved sensitivity of the composite materials to CO<sub>2</sub> can be attributed to the formation of a depletion layer at the p-n junction in an MWCNT/iron oxide heterostructure, and new CO<sub>2</sub> gas molecules adhere to the high surface area of MWCNTs due to the concentration gradient. The test results showed that the CO<sub>2</sub> sensor possesses fast response, compact size, ultra-low power consumption, high sensitivity and wide dynamic detection range. |
topic |
carbon dioxide sensor CO<sub>2</sub> sensor gas sensor room temperature gas sensing functionalized nanotubes electronic nose smartphone sensor chemiresistive sensor nanocomposite |
url |
https://www.mdpi.com/1424-8220/19/18/3848 |
work_keys_str_mv |
AT amihannon solidstateelectronicsensorsfordetectionofcarbondioxide AT jingli solidstateelectronicsensorsfordetectionofcarbondioxide |
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