Next Article in Journal
Effect of Atmospheric Conditions on LIBS Spectra
Previous Article in Journal
Solvent Vapour Detection with Cholesteric Liquid Crystals—Optical and Mass-Sensitive Evaluation of the Sensor Mechanism
Article Menu

Export Article

Open AccessCommunication
Sensors 2010, 10(5), 4898-4906; doi:10.3390/s100504898

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

1
MEMS Lab, Department of Precision Instruments & Mechanology, Tsinghua University, 100084, Beijing, China
2
State Key Lab of Precision Measurement Technology and Instrumentation, Tsinghua University, 100084, Beijing, China
*
Author to whom correspondence should be addressed.
Received: 26 March 2010 / Revised: 17 April 2010 / Accepted: 25 April 2010 / Published: 14 May 2010
(This article belongs to the Section Chemical Sensors)
View Full-Text   |   Download PDF [473 KB, uploaded 21 June 2014]   |  

Abstract

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.
Keywords: flow-rate sensor; carbon nanotube; hysterisis error; coating flow-rate sensor; carbon nanotube; hysterisis error; coating
Figures

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Yang, X.; Zhou, Z.; Wang, D.; Liu, X. High Sensitivity Carbon Nanotubes Flow-Rate Sensors and Their Performance Improvement by Coating. Sensors 2010, 10, 4898-4906.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top