{"title":"Gold-decorated vertically aligned carbon nanofibers for high-performance room-temperature ethanol sensing.","authors":"Mostafa Shooshtari","doi":"10.1007/s00604-025-07367-8","DOIUrl":null,"url":null,"abstract":"<p><p>Room-temperature detection of volatile organic compounds (VOCs) is a persistent challenge for low-power sensing applications. This study presents a scalable method for fabricating gas sensors based on vertically aligned carbon nanofibers (VACNFs) decorated with aerosol-printed gold nanoparticles (Au NPs). The Au-functionalized CNFs show ~ 140% improvement in response at 10 ppm ethanol gas, reduced ~ 5-s response time, and enhanced stability with over 95% signal retention. These improvements are attributed to increased surface area, enhanced graphitic disorder, and the catalytic activity of Au NPs. Structural and morphological characterization using TEM, EDX, SEM, and Raman spectroscopy confirms the successful decoration of CNFs with Au. The effects of operating temperature and humidity on sensor performance are also evaluated.</p>","PeriodicalId":705,"journal":{"name":"Microchimica Acta","volume":"192 8","pages":"517"},"PeriodicalIF":5.3000,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microchimica Acta","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1007/s00604-025-07367-8","RegionNum":2,"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
Room-temperature detection of volatile organic compounds (VOCs) is a persistent challenge for low-power sensing applications. This study presents a scalable method for fabricating gas sensors based on vertically aligned carbon nanofibers (VACNFs) decorated with aerosol-printed gold nanoparticles (Au NPs). The Au-functionalized CNFs show ~ 140% improvement in response at 10 ppm ethanol gas, reduced ~ 5-s response time, and enhanced stability with over 95% signal retention. These improvements are attributed to increased surface area, enhanced graphitic disorder, and the catalytic activity of Au NPs. Structural and morphological characterization using TEM, EDX, SEM, and Raman spectroscopy confirms the successful decoration of CNFs with Au. The effects of operating temperature and humidity on sensor performance are also evaluated.
期刊介绍：
As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.
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