Detection of Volatile Alcohol Vapors Using PMMA-Coated Micromechanical Sensors: Experimental and Quantum Chemical DFT Analysis
Micromechanical sensors, in which the sensor response is created as a result of molecular interactions on the sensors’ surfaces, have been employed as a powerful technique for rapid and sensitive detection of low concentrations of chemical and biological materials. In the study reported herein, poly...
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MDPI AG
2022-11-01
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| Series: | Chemosensors |
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| author | Reem A. Alsaigh Shofiur Rahman Fatimah S. Alfaifi Mahmoud A. Al-Gawati Raghad Shallaa Fatimah Alzaid Amal F. Alanazi Hamad Albrithen Khalid E. Alzahrani Abdulaziz K. Assaifan Abdullah N. Alodhayb Paris E. Georghiou |
| author_facet | Reem A. Alsaigh Shofiur Rahman Fatimah S. Alfaifi Mahmoud A. Al-Gawati Raghad Shallaa Fatimah Alzaid Amal F. Alanazi Hamad Albrithen Khalid E. Alzahrani Abdulaziz K. Assaifan Abdullah N. Alodhayb Paris E. Georghiou |
| author_sort | Reem A. Alsaigh |
| collection | DOAJ |
| description | Micromechanical sensors, in which the sensor response is created as a result of molecular interactions on the sensors’ surfaces, have been employed as a powerful technique for rapid and sensitive detection of low concentrations of chemical and biological materials. In the study reported herein, poly(methyl methacrylate) (PMMA)-coated microcantilever (MCL) sensors were used to detect the vapors of volatile alcohols (methanol, ethanol, and isopropanol) at three different concentrations. A vapor generator was used to generate and flow the alcohol vapor onto the PMMA coated MCL surface in a closed system chamber. The vapor adsorption onto the MCL surface results in a rapid and measurable deflection of the MCL. No significant deflections of the uncoated MCL occurred when the different vapors were passed through into the microcantilever chamber. Linear concentration–deflection responses were observed, with the highest sensitivity shown with methanol, followed by ethanol and then isopropanol. Density functional theory (DFT) quantum chemical calculations were conducted to estimate the electronic interaction energies (ΔIE) between the alcohol molecules and MMA and two different model tetrameric segments of PMMA. The computed ΔIEs were in the same order as the experimentally observed order: methanol > ethanol > isopropanol. |
| first_indexed | 2024-03-09T19:11:00Z |
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| id | doaj.art-de0d0763504e42bcaf9526ddb72a1de1 |
| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-03-09T19:11:00Z |
| publishDate | 2022-11-01 |
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| series | Chemosensors |
| spelling | doaj.art-de0d0763504e42bcaf9526ddb72a1de12023-11-24T04:10:26ZengMDPI AGChemosensors2227-90402022-11-01101145210.3390/chemosensors10110452Detection of Volatile Alcohol Vapors Using PMMA-Coated Micromechanical Sensors: Experimental and Quantum Chemical DFT AnalysisReem A. Alsaigh0Shofiur Rahman1Fatimah S. Alfaifi2Mahmoud A. Al-Gawati3Raghad Shallaa4Fatimah Alzaid5Amal F. Alanazi6Hamad Albrithen7Khalid E. Alzahrani8Abdulaziz K. Assaifan9Abdullah N. Alodhayb10Paris E. Georghiou11Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaBiological and Environmental Sensing Research Unit, King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi ArabiaDepartment of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaDepartment of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaDepartment of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaDepartment of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaBiological and Environmental Sensing Research Unit, King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi ArabiaDepartment of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaDepartment of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaBiological and Environmental Sensing Research Unit, King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi ArabiaDepartment of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaDepartment of Chemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X7, CanadaMicromechanical sensors, in which the sensor response is created as a result of molecular interactions on the sensors’ surfaces, have been employed as a powerful technique for rapid and sensitive detection of low concentrations of chemical and biological materials. In the study reported herein, poly(methyl methacrylate) (PMMA)-coated microcantilever (MCL) sensors were used to detect the vapors of volatile alcohols (methanol, ethanol, and isopropanol) at three different concentrations. A vapor generator was used to generate and flow the alcohol vapor onto the PMMA coated MCL surface in a closed system chamber. The vapor adsorption onto the MCL surface results in a rapid and measurable deflection of the MCL. No significant deflections of the uncoated MCL occurred when the different vapors were passed through into the microcantilever chamber. Linear concentration–deflection responses were observed, with the highest sensitivity shown with methanol, followed by ethanol and then isopropanol. Density functional theory (DFT) quantum chemical calculations were conducted to estimate the electronic interaction energies (ΔIE) between the alcohol molecules and MMA and two different model tetrameric segments of PMMA. The computed ΔIEs were in the same order as the experimentally observed order: methanol > ethanol > isopropanol.https://www.mdpi.com/2227-9040/10/11/452microcantilever sensorpoly(methyl methacrylate) (PMMA)volatile alcoholsvapor generatordensity functional theory (DFT) |
| spellingShingle | Reem A. Alsaigh Shofiur Rahman Fatimah S. Alfaifi Mahmoud A. Al-Gawati Raghad Shallaa Fatimah Alzaid Amal F. Alanazi Hamad Albrithen Khalid E. Alzahrani Abdulaziz K. Assaifan Abdullah N. Alodhayb Paris E. Georghiou Detection of Volatile Alcohol Vapors Using PMMA-Coated Micromechanical Sensors: Experimental and Quantum Chemical DFT Analysis Chemosensors microcantilever sensor poly(methyl methacrylate) (PMMA) volatile alcohols vapor generator density functional theory (DFT) |
| title | Detection of Volatile Alcohol Vapors Using PMMA-Coated Micromechanical Sensors: Experimental and Quantum Chemical DFT Analysis |
| title_full | Detection of Volatile Alcohol Vapors Using PMMA-Coated Micromechanical Sensors: Experimental and Quantum Chemical DFT Analysis |
| title_fullStr | Detection of Volatile Alcohol Vapors Using PMMA-Coated Micromechanical Sensors: Experimental and Quantum Chemical DFT Analysis |
| title_full_unstemmed | Detection of Volatile Alcohol Vapors Using PMMA-Coated Micromechanical Sensors: Experimental and Quantum Chemical DFT Analysis |
| title_short | Detection of Volatile Alcohol Vapors Using PMMA-Coated Micromechanical Sensors: Experimental and Quantum Chemical DFT Analysis |
| title_sort | detection of volatile alcohol vapors using pmma coated micromechanical sensors experimental and quantum chemical dft analysis |
| topic | microcantilever sensor poly(methyl methacrylate) (PMMA) volatile alcohols vapor generator density functional theory (DFT) |
| url | https://www.mdpi.com/2227-9040/10/11/452 |
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