High Sensitivity Carbon Nanotubes Flow-Rate Sensors and Their Performance Improvement by Coating

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 Al(2)O(3) on the CNT surface is proposed. Experimental resu...

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Detalles Bibliográficos
Autores principales: Yang, Xing, Zhou, Zhaoying, Wang, Dingqu, Liu, Xiaoli
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International (MDPI) 2010
Materias:
Communication
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3292153/
https://www.ncbi.nlm.nih.gov/pubmed/22399913
http://dx.doi.org/10.3390/s100504898
Descripción
Sumario: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 Al(2)O(3) on the CNT surface is proposed. Experimental results show that due to the large surface-to-volume ratio and thin coated Al(2)O(3) 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.

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