Ethanol sensing properties of pure and Au modified ZnO nanowires

Niranjan S. Ramgir, Manmeet Kaur, Preetam K. Sharma, Niyanta Datta, S. Kailasaganapathi, S. Bhattacharya, A. K. Debnath, D. K. Aswal, S. K. Gupta

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

Hydrothermally grown zinc oxide (ZnO) nanowires network has been modified with thin Au layer (∼10nm) to realize an ethanol sensor. The sensor films detected ethanol with maximum response at an operating temperature of 325 °C. Incorporation of Au not only enhances the sensor response but also improves the reaction kinetics towards ethanol. The response and recovery times for Au modified sensor films towards 50 ppm of ethanol at 325 °C were 5 and 20 s, respectively. This faster reaction kinetics is attributed to the role of Au in improving the sensing properties as per the electronic sensitization mechanism and its nano-Schottky barriers type junction with ZnO. Nano-Schottky barrier type junction has been attributed further to an increase in resistance for Au modified ZnO. Work function measurements performed using Kelvin probe technique further corroborates the findings.

LanguageEnglish
Pages313-318
Number of pages6
JournalSensors and Actuators, B: Chemical
Volume187
DOIs
Publication statusPublished - 30 Nov 2012

Fingerprint

Zinc Oxide
Zinc oxide
zinc oxides
Nanowires
nanowires
Ethanol
ethyl alcohol
sensors
Sensors
Reaction kinetics
reaction kinetics
operating temperature
recovery
Recovery
probes
electronics
Temperature

Keywords

  • Au
  • Ethanol
  • Gas sensors
  • Hydrothermal growth
  • Nanowires
  • Work function
  • Zno

Cite this

Ramgir, N. S., Kaur, M., Sharma, P. K., Datta, N., Kailasaganapathi, S., Bhattacharya, S., ... Gupta, S. K. (2012). Ethanol sensing properties of pure and Au modified ZnO nanowires. Sensors and Actuators, B: Chemical, 187, 313-318. https://doi.org/10.1016/j.snb.2012.11.079
Ramgir, Niranjan S. ; Kaur, Manmeet ; Sharma, Preetam K. ; Datta, Niyanta ; Kailasaganapathi, S. ; Bhattacharya, S. ; Debnath, A. K. ; Aswal, D. K. ; Gupta, S. K. / Ethanol sensing properties of pure and Au modified ZnO nanowires. In: Sensors and Actuators, B: Chemical. 2012 ; Vol. 187. pp. 313-318.
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Ramgir, NS, Kaur, M, Sharma, PK, Datta, N, Kailasaganapathi, S, Bhattacharya, S, Debnath, AK, Aswal, DK & Gupta, SK 2012, 'Ethanol sensing properties of pure and Au modified ZnO nanowires', Sensors and Actuators, B: Chemical, vol. 187, pp. 313-318. https://doi.org/10.1016/j.snb.2012.11.079

Ethanol sensing properties of pure and Au modified ZnO nanowires. / Ramgir, Niranjan S.; Kaur, Manmeet; Sharma, Preetam K.; Datta, Niyanta; Kailasaganapathi, S.; Bhattacharya, S.; Debnath, A. K.; Aswal, D. K.; Gupta, S. K.

In: Sensors and Actuators, B: Chemical, Vol. 187, 30.11.2012, p. 313-318.

Research output: Contribution to journalArticle

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