NDLI: Sensitivity and long-term stability of γ-Fe2O3 and CoFe2O4 nanoparticle gas sensors for NO2, CO and acetone sensing

Content Provider	IEEE Xplore Digital Library
Author	Luby, S. Jergel, M. Benkovicova, M. Siffalovic, P. Ivanco, J. Vegso, K. Majkova, E. Rella, R. Manera, M.G. Capone, S. Vavra, I.
Copyright Year	2014
Description	Author affiliation: Inst. of Microelectr. & Microsyst., Lecce, Italy (Rella, R.; Manera, M.G.; Capone, S.) \|\| Inst. of Phys. SAS, Bratislava, Slovakia (Luby, S.; Jergel, M.; Benkovicova, M.; Siffalovic, P.; Ivanco, J.; Vegso, K.; Majkova, E.) \|\| Inst. of Electr. Engn. SAS, Bratislava, Slovakia (Vavra, I.)
Abstract	Gas sensors based on $γ-Fe_{2}O_{3}$ and $CoFe_{2}O_{4}$ nanoparticles (NPs) were prepared by Langmuir-Schaeffer deposition onto $Al_{2}O_{3}$ and auxilliary Si substrates. NPs with the size of 6.4 nm $(Fe_{2}O_{3})$ and 7.6 nm $(CoFe_{2}O_{4})$ and polydispersity of 9 % were fabricated by chemical route. NP arrays were analyzed by GIXRD, SEM, TEM, DLS and ellipsometry. $Fe_{2}O_{3}$ sensors show high response of 38 for 500 ppb of strongly oxidizing $NO_{2}.$ The response of $CoFe_{2}O_{4}$ sensors is 10 at 5 ppm of $NO_{2}.$ Sensitivities are lower with reducing CO and acetone gases. After one year storage at room temperature, a 6 % decrease of response was found. The sensor sensitivities are discussed comparing with the best published results so far.
Starting Page	1
Ending Page	4
File Size	823708
Page Count	4
File Format	PDF
ISBN	9781479954742
e-ISBN	9781479954759
DOI	10.1109/ASDAM.2014.6998691
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-10-20
Publisher Place	Slovakia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gas detectors Temperature sensors Thermal stability Substrates Current measurement Actuators
Content Type	Text
Resource Type	Article

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