{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:38:34Z","timestamp":1760243914287,"version":"build-2065373602"},"reference-count":23,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2010,5,14]],"date-time":"2010-05-14T00:00:00Z","timestamp":1273795200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A new type of hot-wire flow-rate sensor (HWFS) with a sensing element made of a macro-sized carbon nanotube (CNT) strand is presented in this study. An effective way to improve repeatability of the CNT flow-rate sensor by coating a layer of Al2O3 on the CNT surface is proposed. Experimental results show that due to the large surface-to-volume ratio and thin coated Al2O3 layer, the CNT flow-rate sensor has higher sensitivity and faster response than a conventional platinum (Pt) HWFS. It is also demonstrated that the covered CNT flow-rate sensor has better repeatability than its bare counterpart due to insulation from the surrounding environment. The proposed CNT flow-rate sensor shows application potential for high-sensitivity measurement of flow rate.<\/jats:p>","DOI":"10.3390\/s100504898","type":"journal-article","created":{"date-parts":[[2010,5,13]],"date-time":"2010-05-13T13:10:57Z","timestamp":1273756257000},"page":"4898-4906","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["High Sensitivity Carbon Nanotubes Flow-Rate Sensors and Their Performance Improvement by Coating"],"prefix":"10.3390","volume":"10","author":[{"given":"Xing","family":"Yang","sequence":"first","affiliation":[{"name":"MEMS Lab, Department of Precision Instruments & Mechanology, Tsinghua University, 100084, Beijing, China"},{"name":"State Key Lab of Precision Measurement Technology and Instrumentation, Tsinghua University, 100084, Beijing, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhaoying","family":"Zhou","sequence":"additional","affiliation":[{"name":"MEMS Lab, Department of Precision Instruments & Mechanology, Tsinghua University, 100084, Beijing, China"},{"name":"State Key Lab of Precision Measurement Technology and Instrumentation, Tsinghua University, 100084, Beijing, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dingqu","family":"Wang","sequence":"additional","affiliation":[{"name":"MEMS Lab, Department of Precision Instruments & Mechanology, Tsinghua University, 100084, Beijing, China"},{"name":"State Key Lab of Precision Measurement Technology and Instrumentation, Tsinghua University, 100084, Beijing, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaoli","family":"Liu","sequence":"additional","affiliation":[{"name":"MEMS Lab, Department of Precision Instruments & Mechanology, Tsinghua University, 100084, Beijing, China"},{"name":"State Key Lab of Precision Measurement Technology and Instrumentation, Tsinghua University, 100084, Beijing, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2010,5,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"266","DOI":"10.1109\/JSEN.2006.886863","article-title":"Development of carbon nanotube-based sensors\u2014A review","volume":"7","author":"Benjamin","year":"2007","journal-title":"IEEE Sens. 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