Nb2O5 Schottky based ethanol vapour sensors: Effect of metallic catalysts
| Autor: | Wojtek Wlodarski, Rozina Abdul Rani, Rosmalini Ab Kadir, Kourosh Kalantar-zadeh, Mahnaz Shafiei, Jian Zhen Ou, Ahmad Sabirin Zoolfakar |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Anodizing Schottky barrier Inorganic chemistry Metals and Alloys Schottky diode Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Catalysis Metal Chemical engineering Electron affinity visual_art Materials Chemistry visual_art.visual_art_medium Niobium oxide Electrical and Electronic Engineering Porosity Instrumentation |
| Zdroj: | Sensors and Actuators B: Chemical. 202:74-82 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2014.04.083 |
| Popis: | The aim of this paper is to compare the performances of the highly porous Nb2O5 Schottky based sensors formed using different catalytic metals for ethanol vapour sensing. The fabricated sensors consist of a fairly ordered nano-vein like porous Nb2O5 prepared via an elevated temperature anodization method. Subsequently, Pt, Pd and Au were sputtered as both Schottky contacts and catalysts for the comparative studies. These metals are chosen as they have large work functions in comparison to the electron affinity of the anodized Nb2O5. It is demonstrated that the device based on Pd/Nb2O5 Schottky contact has the highest sensitivity amongst the developed sensors. The sensing behaviors were studied in terms of the Schottky barrier height variations and properties of the metal catalysts. |
| Databáze: | OpenAIRE |
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