Next Article in Journal
Non Invasive Sensors for Monitoring the Efficiency of AC Electrical Rotating Machines
Next Article in Special Issue
Study of a QCM Dimethyl Methylphosphonate Sensor Based on a ZnO-Modified Nanowire-Structured Manganese Dioxide Film
Previous Article in Journal
Characteristics of Ambient Volatile Organic Compounds (VOCs) Measured in Shanghai, China
Previous Article in Special Issue
Multi-Walled Carbon Nanotube-Doped Tungsten Oxide Thin Films for Hydrogen Gas Sensing
Sensors 2010, 10(8), 7863-7873; doi:10.3390/s100807863
Article

Flame-Spray-Made Undoped Zinc Oxide Films for Gas Sensing Applications

1
,
2
,
3
 and
1,*
1 Nanoscience Research Laboratory, Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand 2 Department of Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand 3 National Electronics and Computer Technology Center, Pathumthani, 12120, Thailand
* Author to whom correspondence should be addressed.
Received: 7 July 2010 / Revised: 16 August 2010 / Accepted: 20 August 2010 / Published: 23 August 2010
(This article belongs to the Special Issue Gas Sensors - 2010)
View Full-Text   |   Download PDF [1296 KB, 21 June 2014; original version 21 June 2014]   |   Browse Figures
SciFeed

Abstract

Using zinc naphthenate dissolved in xylene as a precursor undoped ZnO nanopowders were synthesized by the flame spray pyrolysis technique. The average diameter and length of ZnO spherical and hexagonal particles were in the range of 5 to 20 nm, while ZnO nanorods were found to be 5–20 nm wide and 20–40 nm long, under 5/5 (precursor/oxygen) flame conditions. The gas sensitivity of the undoped ZnO nanopowders towards 50 ppm of NO2, C2H5OH and SO2 were found to be 33, 7 and 3, respectively. The sensors showed a great selectivity towards NO2 at high working temperature (at 300 °C), while small resistance variations were observed for C2H5OH and SO2, respectively.
Keywords: undoped ZnO; flame spray pyrolysis; NO2; C2H5OH; SO2; gas sensor undoped ZnO; flame spray pyrolysis; NO2; C2H5OH; SO2; gas sensor
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote |
RIS
MDPI and ACS Style

Tamaekong, N.; Liewhiran, C.; Wisitsoraat, A.; Phanichphant, S. Flame-Spray-Made Undoped Zinc Oxide Films for Gas Sensing Applications. Sensors 2010, 10, 7863-7873.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here

Comments

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