Related Experiment Video
Updated: Sep 3, 2025
08:23
Real-time Breath Analysis by Using Secondary Nanoelectrospray Ionization Coupled to High Resolution Mass Spectrometry
Published on: March 9, 2018
9.0K
NaCl Ionization-Based Moisture Sensor Prepared by Aerosol Deposition for Monitoring Respiratory Patterns
Myung-Yeon Cho1, Ik-Soo Kim2, Min-Ji Kim1
1Department of Electronic Materials Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, Korea.
Sensors (Basel, Switzerland)
|July 27, 2022
Summary
This study introduces a novel, highly sensitive moisture sensor for respiration monitoring. The sensor utilizes an ionic polarization effect from NaCl/BaTiO3 composite films, enabling advanced healthcare applications.
Area of Science:
- Materials Science
- Sensor Technology
- Biomedical Engineering
Background:
- Moisture sensors are crucial for healthcare applications like human respiration monitoring.
- Existing sensors primarily rely on natural moisture polarization.
- There is a need for sensors with enhanced sensitivity and multimodal capabilities.
Purpose of the Study:
- To develop a novel ionically polarizable moisture sensor.
- To leverage the NaCl ionization effect for improved sensing performance.
- To demonstrate its application in human respiration monitoring.
Main Methods:
- Fabrication of NaCl/BaTiO3 composite films using aerosol deposition (AD).
- Optimization of sensing layer thickness and NaCl weight fraction (37.5 wt%).
- Characterization of sensing performance including sensitivity and response/recovery times.
Main Results:
- The sensor demonstrated outstanding sensitivity across a wide humidity range.
- Achieved a fast response and recovery time of 2/2 seconds.
- Successfully implemented in a human respiration monitoring system with stable electrical signals.
Conclusions:
- The developed NaCl/BaTiO3 moisture sensor offers superior performance due to ionic polarization.
- The facile aerosol deposition process enables efficient sensor fabrication at room temperature.
- The sensor shows significant potential for reliable human respiration monitoring in healthcare settings.
