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

A Gas Sensor Based on a Single SnO Micro-Disk

Full text
Masteghin, Mateus G. [1] ; Orlandi, Marcelo O. [1]
Total Authors: 2
[1] Sao Paulo State Univ, Dept Phys Chem, BR-14800900 Araraquara, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: SENSORS; v. 18, n. 10 OCT 2018.
Web of Science Citations: 0

In this study, individual nanofabricated SnO micro-disks, previously shown to exhibit exceptional sensitivity to NOx, are investigated to further our understanding of gas sensing mechanisms. The SnO disks presenting different areas and thickness were isolated and electrically connected to metallic electrodes aided by a Dual Beam Microscope (SEM/FIB). While single micro-disk devices were found to exhibit short response and recovery times and low power consumption, large interconnected arrays of micro-disks exhibit much higher sensitivity and selectivity. The source of these differences is discussed based on the gas/solid interaction and transport mechanisms, which showed that thickness plays a major role during the gas sensing of single-devices. The calculated Debye length of the SnO disk in presence of NO2 is reported for the first time. (AU)

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 type: Scholarships in Brazil - Master
FAPESP's process: 17/26219-0 - Study of single element chemical sensor devices based on semiconducting metal oxide materials
Grantee:Marcelo Ornaghi Orlandi
Support type: Regular Research Grants
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC