ArticleSensors (Basel, Switzerland)2021
Capacitive Humidity Sensor Based on Carbon Black/Polyimide Composites.
Article in Sensors (Basel, Switzerland), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Enhanced Fringing Field Micro-Moisture Sensor with Elements Optimization.Micromachines · 2026Article
- High-Sensitive Microwave Humidity Sensor Using Polyvinyl Alcohol/Carboxymethyl Cellulose (PVA/CMC) Composites.Sensors (Basel, Switzerland) · 2026Article
- Novel Technologies towards the Implementation and Exploitation of "Green" Wireless Agriculture Sensors.Sensors (Basel, Switzerland) · 2024Review
- Recent Study Advances in Flexible Sensors Based on Polyimides.Sensors (Basel, Switzerland) · 2023Review
- The Application of a Self-Made Integrated Three-in-One Microsensor and Commercially Available Wind Speed Sensor to the Cold Air Pipe of the Heating, Ventilation, and Air Conditioning in a Factory for Real-Time Wireless Measurement.Sensors (Basel, Switzerland) · 2023Article
- Advances in Humidity Nanosensors and Their Application: Review.Sensors (Basel, Switzerland) · 2023Review
- Multilayered Composites with Modulus Gradient for Enhanced Pressure-Temperature Sensing Performance.Sensors (Basel, Switzerland) · 2021Article
Corrections and comments
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Authors and funding
4 authors.
Funding
Abstract
A novel capacitive humidity sensor based on carbon black/polyimide composites is presented in this paper. The details of the fabrication, sensor characteristics, and effect of the carbon black additive are described. It was confirmed that the polyimide composite filled with a tiny amount of carbon black was suitable for a humidity sensing dielectric. The humidity sensors with three different dielectrics, which were pure polyimide, 0.01 wt% carbon black/polyimide, and 0.05 wt% carbon black/polyimide, were fabricated by a micro-electro-mechanical-system (MEMS) process. As the amount of the carbon black additive increased, the sensitivity of the humidity sensor increased. The humidity sensor with 0.05 wt% of carbon black had a much higher sensitivity of 15.21% (20-80% RH, 0.2535%/% RH) than that of the sensor with pure polyimide, which was 9.73% (0.1622%/% RH). The addition of carbon black also led to an enhancement in the hysteresis and response speed. The hysteresis of the humidity sensor decreased from 2.17 to 1.80% when increasing the amount of the carbon black additive. The response speed of the humidity sensor with 0.05 wt% of carbon black was measured to be ~10% faster than that of the sensor with pure polyimide. The long-term stability of the humidity sensors was demonstrated as well.
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Registered trials
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