Enhanced water adsorption properties of Ti3C2Tx MXene/bentonite thin films for highly sensitive humidity sensing
Humidity sensors are integral to modern technology and extensively utilize Ti3C2Tx MXene for its superior sensitivity and accuracy. This material’s effectiveness stems from its abundant hydrophilic functional groups and high electrical conductivity. In this study, we enhanced the responsiveness to r...
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2024-12-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0245810 |
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| author | Hiroya Morotomi Yuki Matsunaga Lijun Liu Hisashi Sugime Jun Hirotani |
| author_facet | Hiroya Morotomi Yuki Matsunaga Lijun Liu Hisashi Sugime Jun Hirotani |
| author_sort | Hiroya Morotomi |
| collection | DOAJ |
| description | Humidity sensors are integral to modern technology and extensively utilize Ti3C2Tx MXene for its superior sensitivity and accuracy. This material’s effectiveness stems from its abundant hydrophilic functional groups and high electrical conductivity. In this study, we enhanced the responsiveness to relative humidity changes by incorporating bentonite, a 2D clay mineral known for its robust water adsorption capacity and ionic conductivity, attributable to its distinctive structure. Our analysis of MXene/bentonite thin films through sheet resistance measurements indicated a clear inverse relationship in resistance changes above and below a specific MXene-to-bentonite ratio. Impedance analysis further revealed that the dominant conduction mechanisms within these films vary according to the mix ratio. In fabricating conductive-type humidity sensors from MXene/bentonite films, we observed a remarkable increase in humidity sensitivity. Particularly, MXene rich film (33 wt. % MXene) demonstrated a sensitivity of ∼58.1 times greater than MXene film, and bentonite rich film (10 wt. % MXene) demonstrated about 5000 times greater than MXene film. This study not only underscores the potential of MXene/bentonite composites in humidity sensing but also highlights the critical role of composition in optimizing sensor performance. |
| format | Article |
| id | doaj-art-26f8e7bca33d4bdbae2188dc1a3a7a95 |
| institution | Kabale University |
| issn | 2158-3226 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj-art-26f8e7bca33d4bdbae2188dc1a3a7a952025-01-02T17:23:44ZengAIP Publishing LLCAIP Advances2158-32262024-12-011412125123125123-710.1063/5.0245810Enhanced water adsorption properties of Ti3C2Tx MXene/bentonite thin films for highly sensitive humidity sensingHiroya Morotomi0Yuki Matsunaga1Lijun Liu2Hisashi Sugime3Jun Hirotani4Department of Micro Engineering, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura C3, Nishikyo-ku, Kyoto 615-8540, JapanDepartment of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, JapanDepartment of Mechanical Engineering, Graduate School of Engineering, Osaka University, Osaka 565-0871, JapanGraduate School of Science and Engineering, Kindai University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502, JapanDepartment of Micro Engineering, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura C3, Nishikyo-ku, Kyoto 615-8540, JapanHumidity sensors are integral to modern technology and extensively utilize Ti3C2Tx MXene for its superior sensitivity and accuracy. This material’s effectiveness stems from its abundant hydrophilic functional groups and high electrical conductivity. In this study, we enhanced the responsiveness to relative humidity changes by incorporating bentonite, a 2D clay mineral known for its robust water adsorption capacity and ionic conductivity, attributable to its distinctive structure. Our analysis of MXene/bentonite thin films through sheet resistance measurements indicated a clear inverse relationship in resistance changes above and below a specific MXene-to-bentonite ratio. Impedance analysis further revealed that the dominant conduction mechanisms within these films vary according to the mix ratio. In fabricating conductive-type humidity sensors from MXene/bentonite films, we observed a remarkable increase in humidity sensitivity. Particularly, MXene rich film (33 wt. % MXene) demonstrated a sensitivity of ∼58.1 times greater than MXene film, and bentonite rich film (10 wt. % MXene) demonstrated about 5000 times greater than MXene film. This study not only underscores the potential of MXene/bentonite composites in humidity sensing but also highlights the critical role of composition in optimizing sensor performance.http://dx.doi.org/10.1063/5.0245810 |
| spellingShingle | Hiroya Morotomi Yuki Matsunaga Lijun Liu Hisashi Sugime Jun Hirotani Enhanced water adsorption properties of Ti3C2Tx MXene/bentonite thin films for highly sensitive humidity sensing AIP Advances |
| title | Enhanced water adsorption properties of Ti3C2Tx MXene/bentonite thin films for highly sensitive humidity sensing |
| title_full | Enhanced water adsorption properties of Ti3C2Tx MXene/bentonite thin films for highly sensitive humidity sensing |
| title_fullStr | Enhanced water adsorption properties of Ti3C2Tx MXene/bentonite thin films for highly sensitive humidity sensing |
| title_full_unstemmed | Enhanced water adsorption properties of Ti3C2Tx MXene/bentonite thin films for highly sensitive humidity sensing |
| title_short | Enhanced water adsorption properties of Ti3C2Tx MXene/bentonite thin films for highly sensitive humidity sensing |
| title_sort | enhanced water adsorption properties of ti3c2tx mxene bentonite thin films for highly sensitive humidity sensing |
| url | http://dx.doi.org/10.1063/5.0245810 |
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