A Rapid Response Humidity Sensor for Monitoring Human Respiration with TiO2-Based Nanotubes as a Sensing Layer

Atalay, S.; Erdemoğlu, Sema; Kolat, V. S.; İzgi, T.; Akgeyik, Emrah; Yılmaz, Hatice Çağlar; Kaya, H.; Atalay, F.E.

doi:10.1007/s11664-020-08006-z

Cited by 9 publications

(4 citation statements)

References 36 publications

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“…Up to now, various humidity sensors were developed by using different sensing materials, including semiconductors, ceramics, and organic polymers. [219][220][221][222][223] Based on the sensing mechanisms, the humidity sensors can be divided into resistive-type, piezoelectric-type, capacitive-type, and optical-type sensors.…”

Section: Humidity Sensorsmentioning

confidence: 99%

Recent Progress in Essential Functions of Soft Electronic Skin

Chen

Zhu

Chang

et al. 2021

Adv Funct Materials

272

140

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Inspired by the human skin, electronic skins (e-skins) composed of various flexible sensors, such as strain sensor, pressure sensor, shear force sensor, temperature sensor, and humility sensor, and delicate circuits, are emerged to mimic the sensing functions of human skins. In this review, the strategies to realize the versatile functionalities of natural skin-like e-skins, including strain-, pressure-, shear force-, temperature-and humility-sensing abilities, as well as self-healing ability and other functions are summarized. Some representative examples of high-performance e-skins and their applications are outlined and discussed. Finally, the outlook of the future of e-skins is presented.

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Section: Humidity Sensorsmentioning

confidence: 99%

Recent Progress in Essential Functions of Soft Electronic Skin

Chen

Zhu

Chang

et al. 2021

Adv Funct Materials

272

140

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“…This humidity sensor showed high sensitivity, fast response, and good sensing performance with selectivity. Atalay et al, [ 13 ] synthesized TiO 2 ‐based nanotubes (NTs) for humidity sensing with low hysteresis. Lin et al [ 14 ] reported a QCM humidity sensor based on superhydrophilic Cu(OH) 2 nanowires, exhibiting high sensitivity (85.9 Hz/% RH) and fast recovery (1.9 s) and self‐healing ability.…”

Section: Introductionmentioning

confidence: 99%

α‐Co(OH)₂‐Based Quartz Crystal Microbalance Humidity Sensor for Real‐Time Monitoring of Respiration

Chen

et al. 2023

Physica Status Solidi (a)

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Respiration is an important physiological process of the human body and can assess an individual's health status. Humidity detection is an effective method for real‐time breath monitoring. Herein, the α‐Co(OH)2‐based quartz crystal microbalance humidity sensor (Co‐QCM sensor) is prepared via the hydrothermal method. The Co‐QCM sensor is characterized by scanning electron microscopy, Fourier‐transform infrared, and X‐ray diffraction. The α‐Co(OH)2 with hierarchical nanostructure and hydroxy functional groups leads to good humidity‐sensing performance. The Co‐QCM sensor exhibits high sensitivity (23.1 Hz/% relative humidity), fast response and recovery times (within 3 and 4 s, respectively), high linearity (R2 = 0.994), and long‐term stability (≈30 days) in the humidity range of 4–73.3%. In addition, different human breathing signals, including free breathing, shallow breathing, and deep breathing, can be detected and distinguished by this humidity sensor, showing the potential application in human respiratory detection.

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“…ITH the development of the modern medical technology, people pay more and more attention to physical health related parameters, such as respiration rate (RR) [1]. The human RR is normally detected by electronic sensor (typically piezoelectric sensor) and optical sensor [2][3][4][5][6][7]. Compared with the traditional piezoelectric sensor, the optical fiber sensor technique has many advantages such as the high sensitivity, resistence to corrosion and immunity to electromagnetic interference.…”

Section: Introductionmentioning

confidence: 99%

Wearable Optical Fiber Sensor Based on a Bend Singlemode-Multimode-Singlemode Fiber Structure for Respiration Monitoring

Pang

Liu

et al. 2021

IEEE Sensors J.

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Respiration rate (RR) is an important information related to human physiological health. A wearable optical fiber sensor for respiration monitoring based on a bend singlemode-multimodesinglemode (SMS) fiber structure, which is highly sensitive to bend, is firstly proposed and experimentally demonstrated. The sensor fastened by an elastic belt on the abdomen of a person will acquire the respiration signal when the person breaths, which will introduce front and back movement of the abdomen, and thus bend of SMS fiber structure. Short-time Fourier transform (STFT) method is employed for signal processing to extract characteristic information of both the time and frequency domain of the measured waveform, which provides accurate RR measurement. Six different SMS fiber sensors have been tested by six individuals and the experimental results demonstrated that the RR signals can be effectively monitored among different individuals, where an average Pearson Correlation Coefficient of 0.88 of the respiration signal has been achieved, which agrees very well with that of commercial belt respiration sensor. The proposed technique can provide a new wearable and portable solution for monitoring of respiratory with advantage of easy fabrication and robust to environment.

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A Rapid Response Humidity Sensor for Monitoring Human Respiration with TiO2-Based Nanotubes as a Sensing Layer

Cited by 9 publications

References 36 publications

Recent Progress in Essential Functions of Soft Electronic Skin

Recent Progress in Essential Functions of Soft Electronic Skin

α‐Co(OH)₂‐Based Quartz Crystal Microbalance Humidity Sensor for Real‐Time Monitoring of Respiration

Wearable Optical Fiber Sensor Based on a Bend Singlemode-Multimode-Singlemode Fiber Structure for Respiration Monitoring

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A Rapid Response Humidity Sensor for Monitoring Human Respiration with TiO2-Based Nanotubes as a Sensing Layer

Cited by 9 publications

References 36 publications

Recent Progress in Essential Functions of Soft Electronic Skin

Recent Progress in Essential Functions of Soft Electronic Skin

α‐Co(OH)2‐Based Quartz Crystal Microbalance Humidity Sensor for Real‐Time Monitoring of Respiration

Wearable Optical Fiber Sensor Based on a Bend Singlemode-Multimode-Singlemode Fiber Structure for Respiration Monitoring

Contact Info

Product

Resources

About

α‐Co(OH)₂‐Based Quartz Crystal Microbalance Humidity Sensor for Real‐Time Monitoring of Respiration