Abstract
The H2S gas sensing performance based on a WO 3/IrO2 diode assisted by gold (Au)-catalyst is investigated. Intermolecular force, similar to Van der Waal interaction, initiates interstitial-water in IrO2 film to be H+-dipoled permanently. H+ and e- produce reversible redox reactions, which control conductivity by utilizing proton-electron double injection. As a result of the catalysis contributed from Au dopant-like particles distributed uniformly on the microdiode bulk surface, the barrier height between the surface of WO3-based microdiode and the reference gas molecules will be decreased in response upon exposure to H2S gas and therefore improve conductometric change significantly. The preliminary dc analysis of the microdiode has revealed repeatable and durable results. Such a microdiode can work stably for a long time without significant signal deterioration.
| Original language | English |
|---|---|
| Pages (from-to) | 2005-2009 |
| Number of pages | 5 |
| Journal | Sensor Letters |
| Volume | 11 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2013 Oct 1 |
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All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering
Cite this
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Electrolyte-free, H2S-sensitive microdiode using a WO 3/IrO2 junction and Au catalyst. / Kuo, Li Min; Shih, Yu-Tai; Wu, Cen-Shawn; Su, Chin Yu; Chao, Shuchi.
In: Sensor Letters, Vol. 11, No. 10, 01.10.2013, p. 2005-2009.Research output: Contribution to journal › Article
TY - JOUR
T1 - Electrolyte-free, H2S-sensitive microdiode using a WO 3/IrO2 junction and Au catalyst
AU - Kuo, Li Min
AU - Shih, Yu-Tai
AU - Wu, Cen-Shawn
AU - Su, Chin Yu
AU - Chao, Shuchi
PY - 2013/10/1
Y1 - 2013/10/1
N2 - The H2S gas sensing performance based on a WO 3/IrO2 diode assisted by gold (Au)-catalyst is investigated. Intermolecular force, similar to Van der Waal interaction, initiates interstitial-water in IrO2 film to be H+-dipoled permanently. H+ and e- produce reversible redox reactions, which control conductivity by utilizing proton-electron double injection. As a result of the catalysis contributed from Au dopant-like particles distributed uniformly on the microdiode bulk surface, the barrier height between the surface of WO3-based microdiode and the reference gas molecules will be decreased in response upon exposure to H2S gas and therefore improve conductometric change significantly. The preliminary dc analysis of the microdiode has revealed repeatable and durable results. Such a microdiode can work stably for a long time without significant signal deterioration.
AB - The H2S gas sensing performance based on a WO 3/IrO2 diode assisted by gold (Au)-catalyst is investigated. Intermolecular force, similar to Van der Waal interaction, initiates interstitial-water in IrO2 film to be H+-dipoled permanently. H+ and e- produce reversible redox reactions, which control conductivity by utilizing proton-electron double injection. As a result of the catalysis contributed from Au dopant-like particles distributed uniformly on the microdiode bulk surface, the barrier height between the surface of WO3-based microdiode and the reference gas molecules will be decreased in response upon exposure to H2S gas and therefore improve conductometric change significantly. The preliminary dc analysis of the microdiode has revealed repeatable and durable results. Such a microdiode can work stably for a long time without significant signal deterioration.
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U2 - 10.1166/sl.2013.2922
DO - 10.1166/sl.2013.2922
M3 - Article
AN - SCOPUS:84896774880
VL - 11
SP - 2005
EP - 2009
JO - Sensor Letters
JF - Sensor Letters
SN - 1546-198X
IS - 10
ER -