| Title: | Selective Discrimination of VOCs Applying Gas Sensing Kinetic Analysis over a Metal Oxide-Based Chemiresistive Gas Sensor |
| Author(s): | Acharyya S; Nag S; Kimbahune S; Ghose A; Pal A; Guha PK; |
| Address: | "Advanced Technology Development Centre, Indian Institute of Technology Kharagpur, Kharagpur 721302, India. Electronics & Electrical Communication Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India. Tata Consultancy Services Research & Innovation, Thane, Maharashtra 400601, India. Tata Consultancy Services Research & Innovation, Kolkata, West Bengal 700160, India" |
| DOI: | 10.1021/acssensors.1c00115 |
| ISSN/ISBN: | 2379-3694 (Electronic) 2379-3694 (Linking) |
| Abstract: | "Semiconducting metal oxide-based gas sensors have inadequate selectivity as they are responsive toward a variety of gases. Here, we report the implementation of gas sensing kinetic analysis of the sensor to identify the tested volatile organic compounds (VOCs) (2-propanol, formaldehyde, methanol, and toluene) precisely. A single chemiresistive sensor was employed having tin oxide-based hollow spheres as the sensing material, which were obtained by chemical synthesis. The gas sensing measurements were conducted in a dynamic manner where the sensor displayed excellent response with high sensitivity. Eley-Rideal model was adopted to obtain the kinetic properties of the gas sensing phenomenon through theoretical fitting of response transient curves and their corresponding kinetic parameters. The calculated characteristic kinetic properties were further examined to discriminate among different VOCs. The approach of using gas sensing kinetic analysis for multiple gas discrimination is an attractive solution to mitigate the problem of cross-sensitivity for resistive gas sensors" |
| Keywords: | Gases Kinetics Oxides *Volatile Organic Compounds chemiresistive gas sensor metal oxide gas sensors sensor's kinetic analysis sensor's selectivity volatile organic compounds; |
| Notes: | "MedlineAcharyya, Snehanjan Nag, Sudip Kimbahune, Sanjay Ghose, Avik Pal, Arpan Guha, Prasanta Kumar eng Research Support, Non-U.S. Gov't 2021/06/15 ACS Sens. 2021 Jun 25; 6(6):2218-2224. doi: 10.1021/acssensors.1c00115. Epub 2021 Jun 14" |
