Novel Preparation and Characterization of Fe2O3/CNT Thin Films for Flammable Gas Sensors

Buaworn Chaitongrat; Sutichai Chaisitsak

doi:10.4028/www.scientific.net/MSF.947.47

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HomeMaterials Science ForumMaterials Science Forum Vol. 947Novel Preparation and Characterization of...

Novel Preparation and Characterization of Fe₂O₃/CNT Thin Films for Flammable Gas Sensors

Abstract:

In this work, novel preparation for Fe₂O₃/CNT thin films was investigated. The Fe/CNT thin films were synthesized through vertical floating-catalyst chemical vapor deposition technique (FC-CVD) and subsequently annealed in air. The various annealing temperature to create Fe₂O₃ was examined and characterized by field emission scanning electron microscopy (FE-SEM), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), Ultraviolet–visible spectroscopy (UV-Vis) and Raman spectroscopy. In addition, effect of wet/dry process on gas sensing of Fe₂O₃/CNTs was also investigated. The results suggest that the interfacial oxide layer helps to significantly improve LPG sensing performance with rapid response and recovery times. The proposed method can be considered as a promising approach for producing ultra-Fe₂O₃/CNT thin films that are appropriate for sensing application.

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Periodical:

Materials Science Forum (Volume 947)

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47-51

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.947.47

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Online since:

March 2019

Authors:

Buaworn Chaitongrat, Sutichai Chaisitsak*

Keywords:

Chemical Vapor Deposition Technique, Gas Sensor, Hybrid Fe₂O₃/ CNTs, Thin Film

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