| 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 |
Semiconductor-Type Gas Sensors Based on Surface-Modified Iron Oxide Nanoparticles for ppb-Level Detection of Acetone |
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言語 |
en |
| 著者 |
Wakita, Satoshi
Masuda, Yoshitake
Choi, Pil Gyu
Matsuoka, Takumi
Harada, Yota
Takami, Seiichi
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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 |
| 権利 |
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|
権利情報 |
This document is the Accepted Manuscript version of a Published Work that appeared in final form in [ACS Applied Electronic Materials], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [https://pubs.acs.org/articlesonrequest/AOR-YXPHT8TPFPBHW5VRBJTP].” |
|
言語 |
en |
| 内容記述 |
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内容記述タイプ |
Abstract |
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内容記述 |
Volatile organic compounds (VOCs) at parts-per-billion (ppb) concentrations in biological gases, such as human breath and skin emissions, are recognized as potential disease biomarkers. As a result, biological gas analysis has attracted considerable attention as a noninvasive approach for disease screening. The purpose of this study was to propose a method to prepare a gas sensor that is capable of detecting VOCs at ppb levels by realizing the high specific surface area of a gas-sensitive layer. Iron oxide nanoparticles modified with 3,4-dihydroxyphenylacetic acid were drop-cast onto an alumina substrate with platinum electrodes to prepare the gas-sensitive layer of the gas sensor. The resistivity of the gas-sensitive layer was measured at 230 °C under dry air with and without VOC gases. The response value was calculated as Ra/Rg, where Ra is the resistance in dry air and Rg is the resistance with VOC gases. The modified nanoparticles exhibited response values of 7.8 and 9.0 for 100 ppb of acetone and acetaldehyde, respectively, substantially higher than those of unmodified iron oxide nanoparticles, which showed responses of 3.0 and 3.1. Scanning electron microscopy and nitrogen adsorption–desorption isotherm analyses revealed that the surface-modified nanoparticles possessed a high specific surface area with numerous pores possibly because the increased interparticle affinity between iron oxide nanoparticles was modified with bifunctional organic molecules. These structural features likely enhanced gas interaction, contributing to the improved sensor response compared to the unmodified counterparts. This study would contribute to screening for diseases such as diabetes with the same ease as breath alcohol testing. |
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言語 |
en |
| 出版者 |
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出版者 |
ACS Publications |
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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 |
|
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/10.1021/acsaelm.5c01355 |
| 収録物識別子 |
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収録物識別子タイプ |
EISSN |
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収録物識別子 |
2637-6113 |
| 書誌情報 |
en : ACS Applied Electronic Materials
巻 7,
号 18,
p. 8550-8560,
発行日 2025-09-23
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| ファイル公開日 |
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|
日付 |
2026-09-23 |
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日付タイプ |
Available |
Semiconductor-Type_Gas_Sensors.pdf (5.4 MB)
