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The linear relationship between breath acetone and blood glucose concentration has been revealed when monitoring diabetes patients. Considerable attention has been directed toward developing a highly sensitive volatile organic compounds (VOCs) sensing material that can detect breath acetone. In this study, we propose a tungsten oxide\/tin oxide\/silver\/poly (methyl methacrylate) (WO3\/SnO2\/Ag\/PMMA) sensing material fabricated using the electrospinning technique. By monitoring the evolution of sensing materials\u2019 extinction spectra, low concentrations of acetone vapor can be detected. Moreover, the interfaces between SnO2 and WO3 nanocrystals construct n\u2212n junctions, which generate more electron\u2013hole pairs than those without such structure when the light strikes. This helps to improve the sensitivity of sensing materials when they are subjected to acetone surroundings. The established sensing materials (WO3\/SnO2\/Ag\/PMMA) exhibit a sensing limit of 20 ppm for acetone vapor and show specificity for acetone even in ambient humidity.<\/jats:p>","DOI":"10.3390\/polym15081833","type":"journal-article","created":{"date-parts":[[2023,4,10]],"date-time":"2023-04-10T03:19:54Z","timestamp":1681096794000},"page":"1833","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Electrospun Fibrous Nanocomposite Sensing Materials for Monitoring Biomarkers in Exhaled Breath"],"prefix":"10.3390","volume":"15","author":[{"given":"Yin-Hsuan","family":"Chang","sequence":"first","affiliation":[{"name":"Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ting-Hung","family":"Hsieh","sequence":"additional","affiliation":[{"name":"Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kai-Chi","family":"Hsiao","sequence":"additional","affiliation":[{"name":"Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ting-Han","family":"Lin","sequence":"additional","affiliation":[{"name":"Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2852-6322","authenticated-orcid":false,"given":"Kai-Hsiang","family":"Hsu","sequence":"additional","affiliation":[{"name":"Division of Pediatric Neonatology, Department of Pediatrics, Chang Gung Memorial Hospital, Linkou, Taoyuan 33305, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3584-3871","authenticated-orcid":false,"given":"Ming-Chung","family":"Wu","sequence":"additional","affiliation":[{"name":"Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan"},{"name":"Division of Pediatric Neonatology, Department of Pediatrics, Chang Gung Memorial Hospital, Linkou, Taoyuan 33305, Taiwan"},{"name":"Green Technology Research Center, Chang Gung University, Taoyuan 33302, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,4,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"260","DOI":"10.1016\/j.apcatb.2018.02.056","article-title":"One-step synthesis of nanostructured g-C3N4\/TiO2 composite for highly enhanced visible-light photocatalytic H2 evolution","volume":"230","author":"Tan","year":"2018","journal-title":"Appl. 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