Anodic Aluminum Oxide-Based Chemi-Capacitive Sensor for Ethanol Gas
Alcohol ingested by humans can be analyzed via breath tests; however, approximately 1% can be excreted via the skin. In this paper, we present a capacitive sensor using hydrophobically treated anodic aluminum oxide (AAO) capable of detecting alcohol excreted through the epidermis. The degree of hydr...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-12-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/14/1/70 |
| _version_ | 1797358381397180416 |
|---|---|
| author | Gi-Hwan Lim In-Yea Kim Ji-Young Park Yong-Ho Choa Jae-Hong Lim |
| author_facet | Gi-Hwan Lim In-Yea Kim Ji-Young Park Yong-Ho Choa Jae-Hong Lim |
| author_sort | Gi-Hwan Lim |
| collection | DOAJ |
| description | Alcohol ingested by humans can be analyzed via breath tests; however, approximately 1% can be excreted via the skin. In this paper, we present a capacitive sensor using hydrophobically treated anodic aluminum oxide (AAO) capable of detecting alcohol excreted through the epidermis. The degree of hydrophobicity based on the duration of exposure to 3-aminopropyltriethoxysilane vapor comprising a small number of Si–NH<sub>2</sub> functional groups on the AAO surface was confirmed and the optimal exposure time was confirmed to be 60 min. The hydrophobized AAO showed a 4.8% reduction in sensitivity to moisture. Simultaneously, the sensitivity of the sensor to ethanol decreased by only 12%. Lastly, the fabricated sensor was successfully operated by attaching it to an ankle-type breathalyzer. |
| first_indexed | 2024-03-08T15:00:08Z |
| format | Article |
| id | doaj.art-2ffdf6caa66042ab9530f66c6cddebe2 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-08T15:00:08Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-2ffdf6caa66042ab9530f66c6cddebe22024-01-10T15:04:58ZengMDPI AGNanomaterials2079-49912023-12-011417010.3390/nano14010070Anodic Aluminum Oxide-Based Chemi-Capacitive Sensor for Ethanol GasGi-Hwan Lim0In-Yea Kim1Ji-Young Park2Yong-Ho Choa3Jae-Hong Lim4Department of Materials Science and Engineering, Gachon University, Seongnam-si 13120, Republic of KoreaDepartment of Materials Science and Engineering, Gachon University, Seongnam-si 13120, Republic of KoreaDepartment of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, Republic of KoreaDepartment of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, Republic of KoreaDepartment of Materials Science and Engineering, Gachon University, Seongnam-si 13120, Republic of KoreaAlcohol ingested by humans can be analyzed via breath tests; however, approximately 1% can be excreted via the skin. In this paper, we present a capacitive sensor using hydrophobically treated anodic aluminum oxide (AAO) capable of detecting alcohol excreted through the epidermis. The degree of hydrophobicity based on the duration of exposure to 3-aminopropyltriethoxysilane vapor comprising a small number of Si–NH<sub>2</sub> functional groups on the AAO surface was confirmed and the optimal exposure time was confirmed to be 60 min. The hydrophobized AAO showed a 4.8% reduction in sensitivity to moisture. Simultaneously, the sensitivity of the sensor to ethanol decreased by only 12%. Lastly, the fabricated sensor was successfully operated by attaching it to an ankle-type breathalyzer.https://www.mdpi.com/2079-4991/14/1/70sensorAAOcapacitive sensorsurface modification |
| spellingShingle | Gi-Hwan Lim In-Yea Kim Ji-Young Park Yong-Ho Choa Jae-Hong Lim Anodic Aluminum Oxide-Based Chemi-Capacitive Sensor for Ethanol Gas Nanomaterials sensor AAO capacitive sensor surface modification |
| title | Anodic Aluminum Oxide-Based Chemi-Capacitive Sensor for Ethanol Gas |
| title_full | Anodic Aluminum Oxide-Based Chemi-Capacitive Sensor for Ethanol Gas |
| title_fullStr | Anodic Aluminum Oxide-Based Chemi-Capacitive Sensor for Ethanol Gas |
| title_full_unstemmed | Anodic Aluminum Oxide-Based Chemi-Capacitive Sensor for Ethanol Gas |
| title_short | Anodic Aluminum Oxide-Based Chemi-Capacitive Sensor for Ethanol Gas |
| title_sort | anodic aluminum oxide based chemi capacitive sensor for ethanol gas |
| topic | sensor AAO capacitive sensor surface modification |
| url | https://www.mdpi.com/2079-4991/14/1/70 |
| work_keys_str_mv | AT gihwanlim anodicaluminumoxidebasedchemicapacitivesensorforethanolgas AT inyeakim anodicaluminumoxidebasedchemicapacitivesensorforethanolgas AT jiyoungpark anodicaluminumoxidebasedchemicapacitivesensorforethanolgas AT yonghochoa anodicaluminumoxidebasedchemicapacitivesensorforethanolgas AT jaehonglim anodicaluminumoxidebasedchemicapacitivesensorforethanolgas |