Nanoparticle Langmuir-Blodgett Arrays for Sensing of CO and NO₂ Gases

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• 作者：Stefan Luby^a ; ^{Stefan.Luby@savba.sk} ; Matej Jergel^a ; Eva Majkova^a ; Peter Siffalovic^a ; Livia Chitu^a ; Roberto Rella^b ; Maria Grazia Manera^b ; Anna-Paola Caricato^c ; Armando Luches^c ; Maurizio Martino^c
• 关键词：nanoparticles ; Langmuir-Blodgett layers ; gas sensing ; CO and NO2 gases
• 刊名：Physics Procedia
• 出版年：2012
• 期刊代码：P128_18753892
• 类别：ph
• 出版时间：2012
• 卷：32
• 期：Complete
• 页码：152-156
• 文件大小：994 K

摘要

Metal oxide sensors with active Fe2O3 and CoFe2O4 nanoparticle arrays were studied. Sensing nanoparticle films from 1, 2, 4 or 7 monolayers were deposited by Langmuir-Blodgett technique. Sensors are formed on the alumina substrates equipped with heating meander. Langmuir-Blodgett layers were heated or UV irradiated to remove the insulating surfactant. Sensing properties were studied towards CO or NO2 gases in concentrations between 0.5 and 100 ppm in mixture with the dry air. Best response values Igas/Iair were obtained with CoFe2O4 device being 3 for 100 ppm of CO and with Fe2O3 device being (38)^-1 for 0.5 ppm of NO2.