Platinum surface additive based nanostructured CuO films for ethanol sensing

Author

Parmar, Manoj ; Rajanna, K.

Author_Institution

Dept. of Instrum. & Appl. Phys., Indian Inst. of Sci., Bangalore, India

fYear

2012

fDate

28-31 Oct. 2012

Firstpage

1

Lastpage

4

Abstract

In the present work, Platinum (Pt)/Copper (II) oxide (CuO) thin film based ethanol sensors were fabricated by sputtering of Pt in varying concentrations over pre-sputtered nanostructured CuO films. The responses of these sensors as a function of Pt concentrations were studied using operating temperature modulation (200-450 °C) and ethanol concentration modulation (100-2500 ppm). During these modulations, it was found that the sensing response was maximum at operating temperature near 400 °C for all the samples irrespective of the Pt concentration dispersed over them. Moreover, the sensing behavior improves for lower Pt concentration (Pt/CuO-60s) and deteriorates for higher Pt concentration (Pt/CuO-120s). In comparison with bare CuO sample, the sensitivity of Pt/CuO-60s increased up to 22% in the linear range and 33% for maximum ethanol concentration. Hence, the well dispersed optimum Pt additive concentration improves the overall sensing behavior including sensitivity, linear working range and response as well as recovery time.

Keywords

copper compounds; gas sensors; nanosensors; platinum; sputtered coatings; Pt-CuO; ethanol concentration modulation; ethanol sensing; nanostructured films; sputter deposition; surface additive; temperature 200 C to 450 C; temperature modulation; Additives; Ethanol; Films; Modulation; Resistance; Temperature sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensors, 2012 IEEE

Conference_Location

Taipei

ISSN

1930-0395

Print_ISBN

978-1-4577-1766-6

Electronic_ISBN

1930-0395

Type

conf

DOI

10.1109/ICSENS.2012.6411488

Filename

6411488