{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T12:27:42Z","timestamp":1785414462217,"version":"3.56.0"},"reference-count":41,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2026,5,29]],"date-time":"2026-05-29T00:00:00Z","timestamp":1780012800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"the Basic and Applied Basic Research Fund of Guangdong Province","award":["2025A1515010560"],"award-info":[{"award-number":["2025A1515010560"]}]},{"name":"the Dongguan Social Development of Science and Technology Key Project","award":["20231800936322"],"award-info":[{"award-number":["20231800936322"]}]},{"DOI":"10.13039\/501100010226","name":"Department of Education of Guangdong Province","doi-asserted-by":"crossref","award":["2023ZDZX1027"],"award-info":[{"award-number":["2023ZDZX1027"]}],"id":[{"id":"10.13039\/501100010226","id-type":"DOI","asserted-by":"crossref"}]},{"award":["2023ZDZX1027"],"award-info":[{"award-number":["2023ZDZX1027"]}],"id":[{"id":"https:\/\/ror.org\/01s5gyw91","id-type":"ROR","asserted-by":"publisher"}]},{"name":"the Dongguan Research Project in Key Areas","award":["20241200300022"],"award-info":[{"award-number":["20241200300022"]}]},{"DOI":"10.13039\/501100011430","name":"State Key Laboratory of Electronic Thin Films and Integrated Devices","doi-asserted-by":"crossref","award":["KFJJ202509"],"award-info":[{"award-number":["KFJJ202509"]}],"id":[{"id":"10.13039\/501100011430","id-type":"DOI","asserted-by":"crossref"}]},{"award":["KFJJ202509"],"award-info":[{"award-number":["KFJJ202509"]}],"id":[{"id":"https:\/\/ror.org\/01t9yse95","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>High-performance ethanol sensors with low power consumption show critical applications in environmental monitoring, personal health diagnosis, industry and traffic safety. Herein, MoO3\/Nb2C MXene heterojunction gas-sensing materials were constructed via a one-step hydrothermal method for MoO3 nanotube synthesis. The dominant facets of MoO3 were shifted from the (040) orientation in MoO3 nanotubes to the (110) and (021) orientations in the MoO3\/Nb2C MXene composite. Nb2C nanosheets provide a large number of crystallization sites, preventing the growth of MoO3 nanotubes during synthesis, inducing a strategic facet release. The sensing performance shows MoO3\/Nb2C MXene composite reduces the operating temperature down to 120 \u00b0C. The 15 wt% Nb2C MXene-precursor-mixed MoO3 sensor exhibits an enhanced response of 6.1 toward 100 ppm ethanol, which is higher than that of pristine MoO3 nanotubes at 120 \u00b0C, with response and recovery times of 19 s and 72 s, respectively. The sensors show high selectivity toward ethanol over other VOC gases and good long-term stability over 30 days. This work confirms that crystal engineering is an effective method for reducing operating temperature and enhancing gas-sensing performance, and the sensor shows potential application for ethanol sensing.<\/jats:p>","DOI":"10.3390\/s26113450","type":"journal-article","created":{"date-parts":[[2026,5,29]],"date-time":"2026-05-29T17:36:18Z","timestamp":1780076178000},"page":"3450","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Low-Temperature Ethanol Gas Sensor Based on MoO3\/Nb2C MXene Composite via Crystal Engineering and Facet Release"],"prefix":"10.3390","volume":"26","author":[{"given":"Baohui","family":"Zhang","sequence":"first","affiliation":[{"name":"School of Integrated Circuits, Dongguan University of Technology, Dongguan 523808, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haoyu","family":"Zhou","sequence":"additional","affiliation":[{"name":"School of Integrated Circuits, Dongguan University of Technology, Dongguan 523808, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaowu","family":"Zhu","sequence":"additional","affiliation":[{"name":"School of Integrated Circuits, Dongguan University of Technology, Dongguan 523808, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haoxiang","family":"Chen","sequence":"additional","affiliation":[{"name":"School of Integrated Circuits, Dongguan University of Technology, Dongguan 523808, China"},{"name":"State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 611731, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8796-597X","authenticated-orcid":false,"given":"Yang","family":"Yang","sequence":"additional","affiliation":[{"name":"School of Integrated Circuits, Dongguan University of Technology, Dongguan 523808, China"},{"name":"State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 611731, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,5,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"208","DOI":"10.1038\/s41378-025-01055-6","article-title":"Ultra-Sensitive Ethanol Detection Using a Chemiresistive SnO2 Thin-Film Gas Sensor Functionalized with RuO2 Nanosheets","volume":"11","author":"Park","year":"2025","journal-title":"Microsyst. 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