Journal
TRANSACTIONS ON ELECTRICAL AND ELECTRONIC MATERIALS
Volume 20, Issue 3, Pages 206-217Publisher
SPRINGER
DOI: 10.1007/s42341-019-00100-2
Keywords
Humidity sensor; Metal oxide; Density functional theory; Optical constants
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The nanocomposites are really promising for industrial, environmental and medical applications. In this work, new types of nanocomposites have been prepared from (PVA-TiO2) nanocomposites doped by SiC nanoparticles for humidity sensor with high sensitivity, flexible, high corrosion resistance and low cost. The experimental and theoretical studies on structural and optical properties of (PVA-TiO2-SiC) nanocomposites have been investigated. The optical microscope and FTIR studies were examined. The optical properties of nanocomposites were examined in wavelength range (220-800)nm. The results showed that the optical absorbance of (PVA-TiO2) nanocomposites increases with increasing of the SiC nanoparticles concentrations. The energy band gap of (PVA-TiO2) nanocomposites decreases while the optical constants increase with the increase in SiC nanoparticles concentrations. The (PVA-TiO2-SiC) nanocomposites tested for humidity sensors at relative humidity range (40-80) RH.%. The experimental results showed that the electrical resistance for (PVA-TiO2-SiC) nanocomposites decreases with increase in relative humidity. The (PVA-TiO2-SiC) nanocomposites have highly sensitivity for relative humidity.
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