"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

High performance gas sensing materials based on nanostructured zinc oxide films

N. IFTIMIE1,2,* , F. IACOMI1, N. REZLESCU2

Affiliation

  1. University Al. I Cuza, Blvd Carol I, 11, 700506, Iasi, Romania
  2. National Institute of Research and Development for Technical Physics, 47 Mangeron Blvd., Iasi, RO-700050, Romania

Abstract

ZnO and ZnO:(Sn, Al) thin films and their sensing properties are presented with respect on their surface texture and composition. Thin films were prepared by vacuum thermal evaporation technique and deposited on different substrates. The thin film structure, crystallinity and morphology were investigated by using X-ray diffraction analysis and Atomic Force Microscopy (AFM). The ZnO gas sensor was exposed to different concentration of gases at elevated temperatures to evaluate the gas sensitivity of ZnO gas sensors. It was found that the highest sensitivity was obtained for temperatures arround 250oC and that sensitivity to a certain gases is influenced by dopants and substrate nature..

Keywords

Thin films, Gas sensor, Sensibility.

Submitted at: April 1, 2008
Accepted at: July 1, 2008

Citation

N. IFTIMIE, F. IACOMI, N. REZLESCU, High performance gas sensing materials based on nanostructured zinc oxide films, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 7, pp. 1810-1813 (2008)