Skip to main content

A Promising Surface Acoustic Wave Humidity Sensor Based on Multi-Walled Carbon Nanotubes/Nafion Composite Film for Low Humidity Detection

Buy Article:

$105.00 plus tax (Refund Policy)

The requirement for a humidity sensor with excellent performance for low humidity detection is becoming more and more urgent. Surface acoustic wave resonator (SAWR) with high resonance frequency was fabricated as basic sensitive component. Multi-walled carbon nanotubes and Nafion (MWCNTs/Nafion) composite material was prepared as humidity sensitive films, deposited on surface of SAWR by dropping method. In the composite film, Nafion with high water absorbing efficiency was mainly for detecting the little change of moisture content. MWCNTs were profitable for improving the sensor's sensitivity and dynamic characteristic due to its large specific area and special ionic conductivity. Characteristic of the composite material could make a full use of the multiple sensing mechanisms of the SAW device. Experiment results showed that the present sensor had both a high RH sensitivity and excellent dynamic characteristic in the whole RH range. For low humidity detection, the present sensor showed quite a high sensitivity up to 260 kHz/%RH and good linearity with R 2 > 0.99. Detection precision of the sensor could reach 0.3%RH at low humidity level below 10%RH.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics


Document Type: Research Article

Publication date: 2011-10-01

More about this publication?
  • The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more