Chaisitsak, Sutichai

Preferred name

Chaisitsak, Sutichai

Alternative Name

Chaisitsak, S.

Main Affiliation

School of Engineering

Email

sutichai.ch@kmitl.ac.th

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Hybrid Fe2O3/CNT thin films for gas sensor applications
(2018-08-13)
Chaitongrat, Buaworn
;
Chaisitsak, Sutichai
Thin films of Fe nanoparticles (NPs)/CNT networks were synthesized through vertical floating catalyst chemical vapor deposition technique (FC-CVD) and collected directly onto a cellulose membrane filter. Fe NPs/CNT films were transferred onto glass (or Si) substrates simply by dissolving filters, and then annealed in air at a low temperature for 8 hrs to create Fe<inf>2</inf>O<inf>3</inf> NPs. The effect of annealing temperature ranging from 150 to 550°C on the morphology and structures of the Fe<inf>2</inf>O<inf>3</inf>/CNTs films was investigated by field emission scanning electron microscopy (FE-SEM), thermogravimetric analysis (TGA), differential thermal analysis (DTA), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. Fe<inf>2</inf>O<inf>3</inf>/CNTs film-based sensors were tested against LPG gas under room temperature. LPG sensing-performance (sensor response and response/recovery time) of the Fe<inf>2</inf>O<inf>3</inf>/CNTs films-based sensor varied depending on the annealing temperature. The results of this study reinforce the potential of hybrid Fe<inf>2</inf>O<inf>3</inf>/CNTs films as a sensing material for LPG detection at low operating temperature.