Fast-response humidity sensor based on laser printing for respiration monitoring

Gong, Wenjie; Zhang, Yang; Han, Yan; Wang, Wei; Dai, Yunzhi; Niu, Lei; Lv, Chao; Xia, Hong; Liu, Tao

doi:10.1039/c9ra10409g

Cited by 46 publications

(22 citation statements)

References 32 publications

(28 reference statements)

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“…Moreover, when the sensitivity of chemiresistors based on pristine PEDOT:PSS loses linearity around 70% RH [42] and reaches saturation around 80% RH, [43] the PEO/PEDOT:PSS-10 shows a rather linear growth with humidity even at high humidity over 80%, presenting a really good sensitivity of around 1.08 % /%RH. On the contrary, the PEO/PEDOT:PSS-40 response loses its linearity for humidity concentration superior to 80% RH, showing a sudden increase of its response, and therefore the sensitivity here could not be properly calculated.…”

Section: Resultsmentioning

confidence: 98%

“…[31,32] This polymer in its pristine form has been applied for humidity sensors dedicated to environmental control, [33][34][35][36][37] art protection, [38] indoor air quality monitoring, [39][40][41] and biomedical applications. [42] However, the evaluation of humidity sensing capacity observing whether there is an influence of VOCs found in breath has not yet been performed. Furthermore, a drop-casted film from this material was also fully tested and characterized toward humidity sensing as a chemiresistor and revealed a saturation limit after 80% relative humidity (RH).…”

Section: Introductionmentioning

confidence: 99%

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Humidity Sensor Based on PEO/PEDOT:PSS Blends for Breath Monitoring

Silva

Duc

Redon

et al. 2021

Macro Materials & Eng

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The discrimination of humidity in exhaled breath is of utmost importance to turn breath analysis into an efficient noninvasive tool for early diagnosis or treatment monitoring of several diseases. Herein, by assembling different ratios of the conductive poly(3,4-ethylenedioxythiophene): polystyrene sulfonate with the polymer matrix polyethylene oxide (PEO), humidity chemiresistor-based sensors are designed and investigated. The testing results display a broad relative humidity detection range (6-92%), repeatability, reproducibility, and good reversibility. Meanwhile, the sensors possess good reliability for distinct temperatures and in the presence of typical volatile organic compounds found in human exhaled air. The hygroscopic idiosyncrasy of PEO is attributed to be the main responsible for the high sensibility toward humidity. In a proof-of-principle for detection of respiration humidity, the outcome shows the ability of the chemiresistors to detect the humidity variation in a real case of breath exposure up to 2 s intervals. The 30 d trial of stability readings shows a standard deviation of only 2.6%. These sensing devices appear as a new array component able to distinguish moisture from biomarkers of diagnosed diseases in breath analysis.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Humidity Sensor Based on PEO/PEDOT:PSS Blends for Breath Monitoring

Silva

Duc

Redon

et al. 2021

Macro Materials & Eng

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“…Impedance-type humidity sensors can be miniaturized by using conventional microfabrication processes and, thus, it is possible to apply the sensor to small animals. Although the tidal volume of respiratory air is smaller (1–2 mL [ 68 ]) and the respiratory rate is faster (80–200 bpm for rats) than those of humans, the sensor successfully monitored the respiratory signals from rats. The humidity sensor monitored the increase in respiratory rates of an anesthetized rat from anesthetization to recovery.…”

Section: Types Of Fast-response Humidity Sensormentioning

confidence: 99%

“…The humidity sensor monitored the increase in respiratory rates of an anesthetized rat from anesthetization to recovery. The change in rat respiration in response to drug injection was also monitored in real time by Wang et al [ 68 ].…”

Section: Types Of Fast-response Humidity Sensormentioning

confidence: 99%

Respiratory Monitoring by Ultrafast Humidity Sensors with Nanomaterials: A Review

Kano

Jarulertwathana

Mohd-Noor

et al. 2022

Sensors

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Respiratory monitoring is a fundamental method to understand the physiological and psychological relationships between respiration and the human body. In this review, we overview recent developments on ultrafast humidity sensors with functional nanomaterials for monitoring human respiration. Key advances in design and materials have resulted in humidity sensors with response and recovery times reaching 8 ms. In addition, these sensors are particularly beneficial for respiratory monitoring by being portable and noninvasive. We systematically classify the reported sensors according to four types of output signals: impedance, light, frequency, and voltage. Design strategies for preparing ultrafast humidity sensors using nanomaterials are discussed with regard to physical parameters such as the nanomaterial film thickness, porosity, and hydrophilicity. We also summarize other applications that require ultrafast humidity sensors for physiological studies. This review provides key guidelines and directions for preparing and applying such sensors in practical applications.

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“…The National Fire Protection Association claimed that 44% of firefighter death was because of abrupt cardiac deaths. 125 Kales and colleagues 126 reported that 45% of firefighter fatalities were cardiac related, so that many people die because of heart damage and not because of fire injuries. ECG is defined as a method to transmit heart electrical activity by placing electrodes on the body.…”

Section: Types Of Wearable Sensors and Their Weaknessesmentioning

confidence: 99%

Challenges and limitation of wearable sensors used in firefighters’ protective clothing

Shakeriaski

Ghodrat

2022

Journal of Fire Sciences

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This review aims to present recent improvements and existing challenges in the design of wearable sensors used in the firefighters’ protective clothing. Wearable sensors are generally used directly on the body or placed on wearable items to monitor data for the safety of firefighters. Recently, wearable sensors have attracted much attention from researchers and experts. Most investigations have addressed novel designs for wearable sensors to enhance firefighters’ safety measures and reduce the risk of exposure to fires. This article is an attempt to review design limitations of wearable sensors for future developments and improve existing shortcomings. The growing body of knowledge focused on the application of wearable technology to monitor firefighters’ activity, health, and body temperature. In the following, we have discussed the trials of the design of the existing sensors. Finally, moisture and radiation as common exterior parameters in fire events are discussed which received less attention and have major impact on the performance of firefighters’ wearable sensors.

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Fast-response humidity sensor based on laser printing for respiration monitoring

Abstract: This work reports a facile and inexpensive laser printing fabrication of PEDOT:PSS micron line as a humidity sensor for respiration monitoring.

Cited by 46 publications

References 32 publications

Humidity Sensor Based on PEO/PEDOT:PSS Blends for Breath Monitoring

Humidity Sensor Based on PEO/PEDOT:PSS Blends for Breath Monitoring

Respiratory Monitoring by Ultrafast Humidity Sensors with Nanomaterials: A Review

Challenges and limitation of wearable sensors used in firefighters’ protective clothing

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