Composite Content Influence on Multiwall Carbon Nanotubes-SiO2 Film Humidity Sensors at AC Testing

Tuo Li; Xiao Wei Liu; Zhen Gang Zhao

doi:10.4028/www.scientific.net/KEM.562-565.750

Paper Titles

Characteristic Research of SOI Rib Waveguide Resonators with SiO₂ Deposited
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Charge Storage Characteristics of Ni-NiO_x Core-Shell Nanocrystals Embedded in SiO₂ Gate Oxide
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Color Filters Based on the Subwavelength Triangular-Lattice Cylinder Arrays in Metal-Dielectric Films
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Combined Torsional Buckling of Carbon Nanotubes Subjected to Thermo-Electro-Mechanical Loadings with Consideration of Scale Effect
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Composite Content Influence on Multiwall Carbon Nanotubes-SiO₂ Film Humidity Sensors at AC Testing
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Highly Efficient Nano-Catalysts Using Activated Carbon as a Support for One-Step Oxidation of Cyclohexane to Adipic Acid
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Influence of Parameters on Fabricating TiO₂ Nanotube by a Hydrothermal Method
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Preparation and Characterization of Polyesteramide Composited by Carbon Nanotube
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Preparation and Megnetic Performance Study of One Dimensional Co-Ni Nanomaterial
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Composite Content Influence on Multiwall Carbon Nanotubes-SiO₂ Film Humidity Sensors at AC Testing

Abstract:

MWNT –SiO2 composite film humidity sensors with different MWNTs proportions were fabricated and their performances under alternating current testing signals are investigated. Influence of MWNT content on humidity sensing characteristics of the sensors is explored and explained by vapor adsorption and capillary condensation effect. It is proved that 60% MWNT content sensors have humidity sensitivity of 1500% at 400 kHz testing frequency, much higher than those with other MWNT contents. In sensors’ sensitivity-frequency relation, maximum sensitivity comes from frequency section of 400kHz to 500kHz for sensors with higher MWNTs proportions.