Anodic Aluminum Oxide-Based Chemi-Capacitive Sensor for Ethanol Gas

被引：5

作者：

Lim, Gi-Hwan ^{[1
]}

Kim, In-Yea ^{[1
]}

Park, Ji-Young ^{[2
]}

Choa, Yong-Ho ^{[2
]}

Lim, Jae-Hong ^{[1
]}

机构：

[1] Gachon Univ, Dept Mat Sci & Engn, Seongnam Si 13120, South Korea

[2] Hanyang Univ, Dept Mat Sci & Chem Engn, Ansan 15588, South Korea

来源：

NANOMATERIALS | 2024年 / 14卷 / 01期

关键词：

sensor; AAO; capacitive sensor; surface modification; ALCOHOL; NANOSTRUCTURES; NANOPARTICLES; FABRICATION; COMPOSITE; DESIGN; LAYER;

D O I：

10.3390/nano14010070

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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-NH2 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.

引用

页数：14

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