Extraordinary performance of semiconducting metal oxide gas sensors using dielectric excitation

2020-06-10T13:00:53+01:00

This week on Journal Club session Ritesh Kumar will talk about impedance spectroscopy and its use in the design of electronic tongue and nose systems. Specifically, he will refer to the paper by Radislav A. Potyrailo et al. along with some of his previous works.

Impedance spectroscopy is a powerful technique which has been applied to the design of instruments for characterising liquids and solids. The ‘impedance fingerprints’ obtained at various frequencies can be used to classify, define sensitivity, selectivity, linearity of systems. It uses a sweep of sinusoidal frequencies as perturbation signal at low voltage so as to remain in the linear and causal domain. In this talk, I will be presenting about impedance spectroscopy and its use in the design of electronic tongue and nose systems in general and specifically the paper by Radislav A. Potyrailo et al. along with some of our previous works in the design of Electronic Tongue systems. The paper by Radislav A. Potyrailo et al. shows that the run-of-the mill metal oxide gas sensors can act as high performance sensors using the impedance measurements. They show exemplary performance in terms of linearity, limit of detection, cross-sensitivity etc. This can pave way for the design of low cost and efficient electronic nose systems.

Papers:

Potyrailo, R.A., Go, S., Sexton, D. et al. "Extraordinary performance of semiconducting metal oxide gas sensors using dielectric excitation" ,Nat Electron 3, 280–289 (2020). https://doi.org/10.1038/s41928-020-0402-3
Ritesh Kumar, Amol P. Bhondekar, Rishemjit Kaur, Saru Vig, Anupma Sharma, Pawan Kapur, "A simple electronic tongue" , Sensors and Actuators B: Chemical, Volumes 171–172, 2012, Pages 1046-1053, ISSN 0925-4005, https://doi.org/10.1016/j.snb.2012.06.031.
Amol P. Bhondekar, Mopsy Dhiman, Anupma Sharma, Arindam Bhakta, Abhijit Ganguli, S.S. Bari, Renu Vig, Pawan Kapur, Madan L. Singla, "A novel iTongue for Indian black tea discrimination" , Sensors and Actuators B: Chemical, Volume 148, Issue 2, 2010, Pages 601-609, ISSN 0925-4005, https://doi.org/10.1016/j.snb.2010.05.053.

Date: 12/06/2020
Time: 16:00
Location: online

UH Biocomputation Group - impedance spectroscopy

Extraordinary performance of semiconducting metal oxide gas sensors using dielectric excitation