Single-crystalline Te microtubes: Synthesis and NO2 gas sensor application
| Autor: | Antonio Tepore, M. Siciliano, T. Siciliano, Alessandra Genga, Emanuela Filippo, G. Micocci |
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| Přispěvatelé: | Siciliano, Tiziana, Filippo, Emanuela, Genga, Alessandra, Micocci, Gioacchino, Siciliano, Maria, Tepore, Antonio |
| Rok vydání: | 2009 |
| Předmět: |
Diffraction
microtubes Scanning electron microscope Chemistry Metals and Alloys Analytical chemistry chemistry.chemical_element Substrate (electronics) Condensed Matter Physics Microanalysis Surfaces Coatings and Films Electronic Optical and Magnetic Materials Materials Chemistry Tellurium Electrical and Electronic Engineering Gas sensor Spectroscopy Inert gas Instrumentation Ambient pressure |
| Zdroj: | Sensors and Actuators B: Chemical. 142:185-190 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2009.07.050 |
| Popis: | Tellurium tubular crystals were grown by direct thermal evaporation of tellurium metal in an inert atmosphere on quartz substrates at ambient pressure without employing any catalyst. Tellurium powder was evaporated by heating at 600 degrees C and was condensed at a substrate temperature of 300-350 degrees C in the downstream of argon gas at a flow rate of 100 mL/min. The structure and chemical composition of the as-synthesized samples were examined by X-ray diffraction analysis, scanning electron microscopy, energy-dispersive X-rays microanalysis and micro-Raman spectroscopy. Scanning electron microscopy images and X-ray diffraction patterns showed that the as-synthesized Te had a tubular single-crystalline morphology with a hexagonal cross-section. The Te microtubes were typically 0.5-6 mm long, 30-70 mu m in external diameter, and 5-20 mu m thick. NO(2) gas-sensing properties of the Te microtubes at room temperature were also investigated. They showed a promising sensitivity and response towards tested gas. (C) 2009 Elsevier B. V. All rights reserved. |
| Databáze: | OpenAIRE |
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