| Title: |
Self-heated Ag-decorated SnO2 nanowires with low power consumption used as a predictive virtual multisensor for H2S-selective sensing |
| Authors: |
Ngoc TM; Duy NV; Hung CM; Hoa ND; Nguyen H; Tonezzer M; Hieu NV |
| Contributors: |
Ngoc, Tm; Duy, Nv; Hung, Cm; Hoa, Nd; Nguyen, H; Tonezzer, M; Hieu, Nv |
| Publication Year: |
2019 |
| Collection: |
Università degli Studi di Cagliari: UNICA IRIS |
| Description: |
Multisensor systems with low-power consumption are emerging for the Internet of Things. In this work, we demonstrate the use of self-heated networked Ag-decorated SnO2 NW sensors integrated into a portable module for selective detection of H2S gas at low power consumption, and the integrated system is simulated as a virtual multisensor under varying heating powers for identifying and quantifying different reducing gases. The H2S gas-sensing characterisations at the different self-heating powers of 2-10 mW showed that the gas response significantly increased with the increase in Ag density decoration and the heated power strongly affected the gas-sensing performance and sensor stability. Excellent response of 21.2 to 0.5 ppm H2S gas was obtained at a low heating power of 2 mW with an acceptable response/recovery time of 18/980 s. The increase of the heating power over 20 mW can destroy the devices. The integrated system could selectively detect H2S at the heating power below 4 mW and H-2, C2H5OH and NH3 gases at the heating power upon 4 mW. The virtual multisensor could discriminate qualitatively (with an accuracy of 100%) and quantitatively H2S, H-2, NH3, C2H5OH (Ethanol) and CH3COCH3 (Aceton) gases with average errors of 13.5%, 14.7%, 16.8%, 16.9%, and 14.8%, respectively. The proposed sensing platform is a promising candidate for selective detection of H2S gas and virtual mul- tisensor with low power consumption for mobile or wireless network devices. (C) 2019 Elsevier B.V. All rights reserved. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/wos/WOS:000467535900011; volume:1069; firstpage:108; lastpage:116; numberofpages:9; journal:ANALYTICA CHIMICA ACTA; https://hdl.handle.net/11584/351700 |
| DOI: |
10.1016/j.aca.2019.04.020 |
| Availability: |
https://hdl.handle.net/11584/351700; https://doi.org/10.1016/j.aca.2019.04.020 |
| Accession Number: |
edsbas.3F4C7398 |
| Database: |
BASE |