QCM Measurements of RH with Nanostructured Carbon-Based Materials: Part 2-Experimental Characterization
In this series of two papers, the humidity sensing of a carbon nanotube (CNT) network-based material is transduced and studied through quartz crystal microbalance (QCM) measurements. To this aim, quartzes functionalized with different amounts of sensing material were realized, exposed to different h...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Chemosensors |
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| Online Access: | https://www.mdpi.com/2227-9040/10/8/320 |
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| author | Ada Fort Anna Lo Grasso Marco Mugnaini Enza Panzardi Lorenzo Parri Valerio Vignoli Cecilia Viti Ammar Al-Hamry Olfa Kanoun |
| author_facet | Ada Fort Anna Lo Grasso Marco Mugnaini Enza Panzardi Lorenzo Parri Valerio Vignoli Cecilia Viti Ammar Al-Hamry Olfa Kanoun |
| author_sort | Ada Fort |
| collection | DOAJ |
| description | In this series of two papers, the humidity sensing of a carbon nanotube (CNT) network-based material is transduced and studied through quartz crystal microbalance (QCM) measurements. To this aim, quartzes functionalized with different amounts of sensing material were realized, exposed to different humidity levels, and characterized. In this second paper, the experimental results are presented and discussed. The sensing mechanisms are elucidated exploiting the theory presented in the first paper of this series. The presented results show that the investigated material functionalization induces a large response of QCM to humidity in terms of resonant frequency even at low RH levels, with a sensitivity of about 12 Hz/%RH (at RH < 30% and room temperature and 10 ug of deposited SWCNT solution) and an increase in sensitivity in the high RH range typical of nanostructured film. Regarding the response in terms of motional resistance, a large response is obtained only at intermediate and high humidity levels, confirming that condensation of water in the film plays an important role in the sensing mechanism of nanostructured materials. |
| first_indexed | 2024-03-09T09:59:53Z |
| format | Article |
| id | doaj.art-d31e707d6ad745ed83e77a5f1a0388c8 |
| institution | Directory Open Access Journal |
| issn | 2227-9040 |
| language | English |
| last_indexed | 2024-03-09T09:59:53Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Chemosensors |
| spelling | doaj.art-d31e707d6ad745ed83e77a5f1a0388c82023-12-01T23:33:56ZengMDPI AGChemosensors2227-90402022-08-0110832010.3390/chemosensors10080320QCM Measurements of RH with Nanostructured Carbon-Based Materials: Part 2-Experimental CharacterizationAda Fort0Anna Lo Grasso1Marco Mugnaini2Enza Panzardi3Lorenzo Parri4Valerio Vignoli5Cecilia Viti6Ammar Al-Hamry7Olfa Kanoun8Department of Information Engineering and Mathematical Sciences, University of Siena, Via Roma 56, 53100 Siena, ItalyDepartment of Information Engineering and Mathematical Sciences, University of Siena, Via Roma 56, 53100 Siena, ItalyDepartment of Information Engineering and Mathematical Sciences, University of Siena, Via Roma 56, 53100 Siena, ItalyDepartment of Information Engineering and Mathematical Sciences, University of Siena, Via Roma 56, 53100 Siena, ItalyDepartment of Information Engineering and Mathematical Sciences, University of Siena, Via Roma 56, 53100 Siena, ItalyDepartment of Information Engineering and Mathematical Sciences, University of Siena, Via Roma 56, 53100 Siena, ItalyDepartment of Physical Science, Earth and Environment, University of Siena, Via Laterina 8, 53100 Siena, ItalyDepartment of Electrical Engineering and Information Technology, Chemnitz University of Technology, 09107 Chemnitz, GermanyDepartment of Electrical Engineering and Information Technology, Chemnitz University of Technology, 09107 Chemnitz, GermanyIn this series of two papers, the humidity sensing of a carbon nanotube (CNT) network-based material is transduced and studied through quartz crystal microbalance (QCM) measurements. To this aim, quartzes functionalized with different amounts of sensing material were realized, exposed to different humidity levels, and characterized. In this second paper, the experimental results are presented and discussed. The sensing mechanisms are elucidated exploiting the theory presented in the first paper of this series. The presented results show that the investigated material functionalization induces a large response of QCM to humidity in terms of resonant frequency even at low RH levels, with a sensitivity of about 12 Hz/%RH (at RH < 30% and room temperature and 10 ug of deposited SWCNT solution) and an increase in sensitivity in the high RH range typical of nanostructured film. Regarding the response in terms of motional resistance, a large response is obtained only at intermediate and high humidity levels, confirming that condensation of water in the film plays an important role in the sensing mechanism of nanostructured materials.https://www.mdpi.com/2227-9040/10/8/320QCMhumidity sensorsCNT water absorptionCNT-based humidity sensorsQCM humiditycarbon-based sensing film |
| spellingShingle | Ada Fort Anna Lo Grasso Marco Mugnaini Enza Panzardi Lorenzo Parri Valerio Vignoli Cecilia Viti Ammar Al-Hamry Olfa Kanoun QCM Measurements of RH with Nanostructured Carbon-Based Materials: Part 2-Experimental Characterization Chemosensors QCM humidity sensors CNT water absorption CNT-based humidity sensors QCM humidity carbon-based sensing film |
| title | QCM Measurements of RH with Nanostructured Carbon-Based Materials: Part 2-Experimental Characterization |
| title_full | QCM Measurements of RH with Nanostructured Carbon-Based Materials: Part 2-Experimental Characterization |
| title_fullStr | QCM Measurements of RH with Nanostructured Carbon-Based Materials: Part 2-Experimental Characterization |
| title_full_unstemmed | QCM Measurements of RH with Nanostructured Carbon-Based Materials: Part 2-Experimental Characterization |
| title_short | QCM Measurements of RH with Nanostructured Carbon-Based Materials: Part 2-Experimental Characterization |
| title_sort | qcm measurements of rh with nanostructured carbon based materials part 2 experimental characterization |
| topic | QCM humidity sensors CNT water absorption CNT-based humidity sensors QCM humidity carbon-based sensing film |
| url | https://www.mdpi.com/2227-9040/10/8/320 |
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