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[IEEE 2019 IEEE SENSORS - Montreal, QC, Canada (2019.10.27-2019.10.30)] 2019 IEEE SENSORS - Crumpled Carbon Nanotube Thin Film Heaters for High Sensitivity Hydrogen Sensing
摘要： This paper reports the fabrication and characterization of crumpled multi-walled carbon nanotube (CNT) thin film heater and its application towards hydrogen gas sensing. We have fabricated MWCNTs thin film heater by a simple spray coating and thermally shrinking the polystyrene (PS) substrate. Thermal shrinkage results crumpled CNTs with closely packed junctions, leading to a higher heating temperature at a given input voltage. Such efficient heating capabilities of the crumpled CNT heater are favorable for hydrogen gas sensing with good desorption characteristics. Our results show that higher operating temperatures result in better measurement sensitivities. In addition, the heating performance and temperature coefficient of resistance (TCR) of CNT heaters are analyzed for an accurate temperature control. The suggested crumpled CNT heaters can be applied for low-voltage gas sensing platforms.
关键词： gas sensor,Hydrogen sensing,MWCNTs,Thin film heater,Joule heating,Substrate shrinkage
更新于2025-09-16 10:30:52
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Transparent Heater Based on Al,Ga Co-doped ZnO Thin Films
摘要： Al, Ga co-doped ZnO thin films were deposited on to glass substrates by aerosol assisted chemical transport (AACT) and were studied for application as transparent thin film heaters. The film thickness was around 400 nm after 60 min of AACT deposition; this gave a sheet resistance of 142.5 ?/sq, which corresponded to a resistivity of 5.7 x 10-3 ?.cm. The thin films exhibited a maximum transmittance of 90% in the visible region. A mean temperature of 132.3 oC was reached after applying a voltage of 18 V for 10 min, giving a power consumption of 2.11 W. These results could provide a possibility to use Al, Ga co-doped ZnO thin films as transparent heaters to replace the more expensive indium tin oxide.
关键词： Transparent conducting oxides,microwave synthesis,thin film heater
更新于2025-09-09 09:28:46