Comparison between Linear and Branched Polyethylenimine and Reduced Graphene Oxide Coatings as a Capture Layer for Micro Resonant CO<sub>2</sub> Gas Concentration Sensors
The comparison between potential coatings for the measurement of CO<sub>2</sub> concentration through the frequency shift in micro-resonators is presented. The polymers evaluated are linear polyethylenimine, branched polyethylenimine and reduced graphene oxide (rGO) by microwave reductio...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-03-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/20/7/1824 |
| _version_ | 1828153128139096064 |
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| author | Alberto Prud’homme Frederic Nabki |
| author_facet | Alberto Prud’homme Frederic Nabki |
| author_sort | Alberto Prud’homme |
| collection | DOAJ |
| description | The comparison between potential coatings for the measurement of CO<sub>2</sub> concentration through the frequency shift in micro-resonators is presented. The polymers evaluated are linear polyethylenimine, branched polyethylenimine and reduced graphene oxide (rGO) by microwave reduction with polyethylenimine. The characterization of the coatings was made by using 6 MHz gold-plated quartz crystals, and a proof-of-concept sensor is shown with a diaphragm electrostatic microelectromechanical systems (MEMS) resonator. The methods of producing the solutions of the polymers deposited onto the quartz crystals are presented. A CO<sub>2</sub> concentration range from 0.05 % to 1 % was dissolved in air and humidity level were controlled and evaluated. Linear polyethylenimine showed superior performance with a reaction time obtained for stabilization after the concentration increase of 345 s, while the time for recovery was of 126 s, with a maximum frequency deviation of 33.6 Hz for an in-air CO<sub>2</sub> concentration of 0.1%. |
| first_indexed | 2024-04-11T22:21:57Z |
| format | Article |
| id | doaj.art-77bb5e1d927644d19d44f13a745e1934 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T22:21:57Z |
| publishDate | 2020-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-77bb5e1d927644d19d44f13a745e19342022-12-22T04:00:06ZengMDPI AGSensors1424-82202020-03-01207182410.3390/s20071824s20071824Comparison between Linear and Branched Polyethylenimine and Reduced Graphene Oxide Coatings as a Capture Layer for Micro Resonant CO<sub>2</sub> Gas Concentration SensorsAlberto Prud’homme0Frederic Nabki1Department of Electrical Engineering, École de Technologie Supérieure, Montreal, QC H3C 1K3, CanadaDepartment of Electrical Engineering, École de Technologie Supérieure, Montreal, QC H3C 1K3, CanadaThe comparison between potential coatings for the measurement of CO<sub>2</sub> concentration through the frequency shift in micro-resonators is presented. The polymers evaluated are linear polyethylenimine, branched polyethylenimine and reduced graphene oxide (rGO) by microwave reduction with polyethylenimine. The characterization of the coatings was made by using 6 MHz gold-plated quartz crystals, and a proof-of-concept sensor is shown with a diaphragm electrostatic microelectromechanical systems (MEMS) resonator. The methods of producing the solutions of the polymers deposited onto the quartz crystals are presented. A CO<sub>2</sub> concentration range from 0.05 % to 1 % was dissolved in air and humidity level were controlled and evaluated. Linear polyethylenimine showed superior performance with a reaction time obtained for stabilization after the concentration increase of 345 s, while the time for recovery was of 126 s, with a maximum frequency deviation of 33.6 Hz for an in-air CO<sub>2</sub> concentration of 0.1%.https://www.mdpi.com/1424-8220/20/7/1824polyethyleniminemicro-resonatorco<sub>2</sub> sensorgas sensorhumidity sensorreduced graphene oxidecoatingsmass sensor |
| spellingShingle | Alberto Prud’homme Frederic Nabki Comparison between Linear and Branched Polyethylenimine and Reduced Graphene Oxide Coatings as a Capture Layer for Micro Resonant CO<sub>2</sub> Gas Concentration Sensors Sensors polyethylenimine micro-resonator co<sub>2</sub> sensor gas sensor humidity sensor reduced graphene oxide coatings mass sensor |
| title | Comparison between Linear and Branched Polyethylenimine and Reduced Graphene Oxide Coatings as a Capture Layer for Micro Resonant CO<sub>2</sub> Gas Concentration Sensors |
| title_full | Comparison between Linear and Branched Polyethylenimine and Reduced Graphene Oxide Coatings as a Capture Layer for Micro Resonant CO<sub>2</sub> Gas Concentration Sensors |
| title_fullStr | Comparison between Linear and Branched Polyethylenimine and Reduced Graphene Oxide Coatings as a Capture Layer for Micro Resonant CO<sub>2</sub> Gas Concentration Sensors |
| title_full_unstemmed | Comparison between Linear and Branched Polyethylenimine and Reduced Graphene Oxide Coatings as a Capture Layer for Micro Resonant CO<sub>2</sub> Gas Concentration Sensors |
| title_short | Comparison between Linear and Branched Polyethylenimine and Reduced Graphene Oxide Coatings as a Capture Layer for Micro Resonant CO<sub>2</sub> Gas Concentration Sensors |
| title_sort | comparison between linear and branched polyethylenimine and reduced graphene oxide coatings as a capture layer for micro resonant co sub 2 sub gas concentration sensors |
| topic | polyethylenimine micro-resonator co<sub>2</sub> sensor gas sensor humidity sensor reduced graphene oxide coatings mass sensor |
| url | https://www.mdpi.com/1424-8220/20/7/1824 |
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