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Effect of polyethylene glycol additive in sol on the humidity sensing properties of a TiO2 thin film
Kuyyadi P. Biju,Mahaveer K. Jain +1 more
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In this article, the effect of polyethylene glycol (PEG) addition to the precursor solution on the humidity sensing properties of a TiO2 thin film was described.Abstract:
We describe the effect of polyethylene glycol (PEG) addition to the precursor solution on the humidity sensing properties of a TiO2 thin film. Thin films of TiO2 were prepared by sol–gel and spin coating techniques. An increase in humidity sensitivity has been observed after the addition of PEG. This increase in sensitivity is due to smaller crystallites and pores created during the combustion of the polymer. The response and recovery time of the sensor were about 10 and 176 s, respectively. An equivalent circuit has been proposed and fitted well with the experimental data. We demonstrate that a controlled amount of polymer addition leads to the sensor being highly sensitive in the lower humidity (<40% RH) region.read more
Citations
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Fast-Response and Flexible Nanocrystal-Based Humidity Sensor for Monitoring Human Respiration and Water Evaporation on Skin
TL;DR: A fast-response and flexible nanocrystal-based humidity sensor for real-time monitoring of human activity: respiration and water evaporation on skin in real time and is promising for application in personal health monitoring as well as environmental monitoring.
Journal ArticleDOI
The sol-gel template synthesis of porous TiO2 for a high performance humidity sensor.
TL;DR: A simple template assisted sol-gel process for preparing porous TiO2 for a high performance humidity sensor that exhibits high sensitivity and linear response in the wide relative humidity (RH) range of 11%-95%, with an impedance variation of four orders of magnitude to humidity change.
Journal ArticleDOI
Rapid synthesis of cerium oxide nanoparticles with superior humidity-sensing performance
Sharada Thakur,P.P. Patil +1 more
TL;DR: In this paper, a simple and rapid microwave assisted method for synthesizing cerium oxide (CeO2) nanoparticles for the fabrication of high-performance humidity sensors is reported.
Journal ArticleDOI
2D TiO2 nanosheets for ultrasensitive humidity sensing application benefited by abundant surface oxygen vacancy defects
TL;DR: In this paper, a 2D as-prepared TiO2 nanosheets with characteristics of surface oxygen vacancy defects and large surface area were designed and synthesized to realize the sensitive and rapid sensing of humidity.
Journal ArticleDOI
Application of dyes extracted from Alternanthera dentata leaves and Musa acuminata bracts as natural sensitizers for dye-sensitized solar cells
Mahmoud A M Al-Alwani,Norasikin Ahmad Ludin,Abu Bakar Mohamad,Abdul Amir H. Kadhum,Abduljabbar Mukhlus +4 more
TL;DR: The natural dyes anthocyanin and chlorophyll were extracted from Musa acuminata bracts and Alternanthera dentata leaves and applied as sensitizers in TiO2-based dye-sensitized solar cells (DSSCs) to demonstrate photosensitization effects.
References
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Journal ArticleDOI
Ceramic sensors for humidity detection: the state-of-the-art and future developments
TL;DR: In this paper, the performance of ionic-type humidity sensors by the addition of alkali ions is explained in terms of influence on the microstructure and on the intrinsic impedance.
Journal ArticleDOI
Humidity sensors: Principles and applications
Noboru Yamazoe,Yasuhiro Shimizu +1 more
TL;DR: In this paper, the principles, fabrication and applications of the respective groups of humidity sensors, together with recent topics including miniaturization and integration of sensors are described, and a detailed overview of the applications of these sensors can be found.
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Theoretical studies on the impedance-humidity characteristics of ceramic humidity sensors
TL;DR: In this paper, a general equation is derived to calculate the impedance of the model sensor at a certain relative humidity using the Kelvin equation, and an analytical model is proposed to clarify the relationship between the impedance-humidity characteristics and the pore size distribution.
Journal ArticleDOI
Metal oxide nanoarchitectures for environmental sensing.
TL;DR: Different routes for the fabrication of metal oxide nanoarchitectures useful to sensing applications, including mesoporous thin films, nanowires, and nanotubes are reviewed, finding that such materials can be successfully used as a wide-range humidity sensor.
Journal ArticleDOI
Synthesis of mesoporous TiO2-based powders and their gas-sensing properties
TL;DR: In this paper, a modified sol-gel method with Ti(NO 3 ) 4 and polyethylene glycol (PEG) having different molecular weights (MWs) was employed to obtain ordered mesoporous structure.
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