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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Heating Method Effect on SnO Micro-Disks as NO2 Gas Sensor

Full text
Author(s):
Masteghin, Mateus G. [1, 2] ; Godoi, Denis R. M. [1] ; Orlandi, Marcelo O. [1]
Total Authors: 3
Affiliation:
[1] Sao Paulo State Univ, Dept Phys Chem, Araraquara - Brazil
[2] Univ Surrey, Adv Technol Inst, Guildford, Surrey - England
Total Affiliations: 2
Document type: Journal article
Source: FRONTIERS IN MATERIALS; v. 6, JUL 16 2019.
Web of Science Citations: 0
Abstract

There is an increasing concern about NOx emission, and many studies have been carried out using metal oxide semiconductors (MOS) aiming its detection. Among the MOS, the SnO micro-disks present a high sensor response and a great selectivity toward NO2. Nevertheless, sensor signal, limit of detection (LOD), and recovery time are related to the experimental setup used to carry on the measurements. Thus, two different heating methods (self-heating and external heating) have been carried out to understand in what manner they change the sensor properties of the SnO micro-disks onto interdigitated electrodes. The external heating method presented higher sensor signal, best LOD, and lower recovery time, mainly due to the lack of a temperature gradient between the SnO disks and the chamber atmosphere. On the other hand, response time was shown to be the same regardless of the method. Briefly, the authors used thermodynamic equations to better understand the temperature effect on the gas-solid interactions occurring between SnO disks and NO2 species. (AU)

FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 15/21033-0 - Comparison of the gas sensor response of devices with single and multiple tin oxide nanobelts
Grantee:Mateus Gallucci Masteghin
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 17/12870-0 - Gas sensor response of devices made up by multiples and single tin dioxide-based nanobelts
Grantee:Mateus Gallucci Masteghin
Support Opportunities: Scholarships abroad - Research Internship - Master's degree
FAPESP's process: 17/26219-0 - Study of Single Element Chemical Sensor Devices based on Semiconducting Metal Oxide Materials
Grantee:Marcelo Ornaghi Orlandi
Support Opportunities: Regular Research Grants