| アイテムタイプ |
itemtype_ver1(1) |
| 公開日 |
2025-12-23 |
| タイトル |
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タイトル |
Humidity-independent acetone gas sensors with ppbv-level sensitivity and high selectivity, using an In2O3 microporous nanoneedle array |
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言語 |
en |
| 著者 |
Matsuoka, Takumi
Choi, Pil Gyu
Takami, Seiichi
Masuda, Yoshitake
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| アクセス権 |
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アクセス権 |
embargoed access |
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アクセス権URI |
http://purl.org/coar/access_right/c_f1cf |
| 内容記述 |
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内容記述タイプ |
Abstract |
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内容記述 |
The detection of ppbv-level acetone is critical for the non-invasive diagnosis of diabetes and assessment of metabolic conditions. Highly sensitive humidity-independent gas sensors are required to achieve this goal. However, conventional semiconductor metal oxide (SMO) sensors often exhibit reduced performance in humid air. To overcome these limitations, we synthesized an In2O3 microporous nanoneedle array via chemical bath deposition and thermal treatment. These nanoneedles, composed of 3.4 ± 0.8 nm nanocrystallites, were meticulously arranged into well-ordered nanorods. The array featured pores with a diameter of 1.78 nm and exhibited both cubic and hexagonal phases of In2O3. The nanoneedles were formed through heterogeneous nucleation on the alumina substrate, followed by vertical and lateral growth, which produced self-standing porous structures with increasing size over the deposition time. The In2O3 microporous nanoneedle array sensors demonstrated exceptional sensitivity to acetone among 7 VOC gases, achieving a noteworthy response (Ra·Rg−1 = 8.17 at 100 ppbv). The experimental and theoretical limits of detection (LOD) for acetone in dry air were 5 ppbv and 152 pptv, respectively. Notably, the sensor maintained an experimental LOD of 10 ppbv for acetone at 90% relative humidity (Ra·Rg−1 = 2.98 at 10 ppbv). Moreover, the sensors exhibited excellent reproducibility, fast response/recovery times, and good long-term stability. Appropriate control of the nanostructure morphology contributes to achieving humidity-independent acetone sensing without the need for hybrid materials or noble metal catalysts. This approach provides a practical and reliable strategy for acetone sensing in humid atmospheres, supporting early diabetes screening and monitoring of metabolic conditions. |
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言語 |
en |
| 出版者 |
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出版者 |
Royal Society of Chemistry |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプresource |
http://purl.org/coar/resource_type/c_6501 |
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タイプ |
journal article |
| 出版タイプ |
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出版タイプ |
AM |
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出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
| 関連情報 |
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関連タイプ |
isVersionOf |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1039/D5TA04209G |
| 収録物識別子 |
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収録物識別子タイプ |
PISSN |
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収録物識別子 |
2050-7488 |
| 書誌情報 |
en : Journal of Materials Chemistry A
巻 13,
号 38,
p. 32899-32914,
発行日 2025-10-14
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| ファイル公開日 |
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日付 |
2026-10-14 |
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日付タイプ |
Available |
Humidity-independent_acetone_gas_sensors.pdf (6.5 MB)
