{"title":"Room Temperature and Humidity Resistant NH3 Detection Based on a Composite of Hydrophobic CNTs with Sulfur Nanosheets","authors":"Xiaoni Cui, Huaipeng Wang, Xinglei Wang, Yuchen Tang, Yaozhou Zhang, Yu Dong, Liuwei Jing, Lihua Shen","doi":"10.1021/acssensors.4c02076","DOIUrl":null,"url":null,"abstract":"A composite of sulfur nanosheets (S-NSs) with hydrophobic carbon nanotubes (H-CNTs) was designed, and a chemiresistive gas sensor based on this composite material was constructed for breath analysis of NH<sub>3</sub> detection at room temperature. Taking advantage of the capillary condensation of CNTs, the hydrophobic effect of hexadecyltrimethoxysilane (HDTMS), and the high sensitivity of S-NSs to NH<sub>3</sub> detection, the constructed sensor showed an improved humidity-resistant capacity and is capable of detecting breath-relevant NH<sub>3</sub> concentrations down to ppb level under high humidity. The fabricated gas sensor exhibited fast response/recovery (18/26 s) and good stability. Online monitoring for exhaled breath analysis shows good recovery with a stable baseline, providing a potential practical application. The research also facilitates the development of commercial low-cost breath analysis sensors.","PeriodicalId":24,"journal":{"name":"ACS Sensors","volume":"33 1","pages":""},"PeriodicalIF":8.2000,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Sensors","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1021/acssensors.4c02076","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
引用次数: 0
Abstract
A composite of sulfur nanosheets (S-NSs) with hydrophobic carbon nanotubes (H-CNTs) was designed, and a chemiresistive gas sensor based on this composite material was constructed for breath analysis of NH3 detection at room temperature. Taking advantage of the capillary condensation of CNTs, the hydrophobic effect of hexadecyltrimethoxysilane (HDTMS), and the high sensitivity of S-NSs to NH3 detection, the constructed sensor showed an improved humidity-resistant capacity and is capable of detecting breath-relevant NH3 concentrations down to ppb level under high humidity. The fabricated gas sensor exhibited fast response/recovery (18/26 s) and good stability. Online monitoring for exhaled breath analysis shows good recovery with a stable baseline, providing a potential practical application. The research also facilitates the development of commercial low-cost breath analysis sensors.
期刊介绍：
ACS Sensors is a peer-reviewed research journal that focuses on the dissemination of new and original knowledge in the field of sensor science, particularly those that selectively sense chemical or biological species or processes. The journal covers a broad range of topics, including but not limited to biosensors, chemical sensors, gas sensors, intracellular sensors, single molecule sensors, cell chips, and microfluidic devices. It aims to publish articles that address conceptual advances in sensing technology applicable to various types of analytes or application papers that report on the use of existing sensing concepts in new ways or for new analytes.
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