Flexible humidity sensor based on modified cellulose paper

Guan, Xin Yuan; Hou, Zhaonan; Wu, Ke; Zhao, Hongran; Liu, Sen; Teng, Fei; Zhang, Tong

doi:10.1016/j.snb.2021.129879

Cited by 107 publications

(43 citation statements)

References 62 publications

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“…This process is described in Figure 6 a where the charge carrier is an ionic species. The mechanism is often used in electrolytic conductive materials (e.g., Nafion [ 32 ], polyelectrolytic polymer [ 41 , 42 , 43 , 44 , 45 , 46 ]) or insulating oxide materials with a hydrophilic surface [ 47 , 48 , 49 , 50 , 51 , 52 , 53 ]. Recently reported fast impedance-based humidity sensors rely on this mechanism, as shown later.…”

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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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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show abstract

“…Besides the use of carbon-based materials as a sensing layer, Sahatiya et al fabricated a multi-responsive sensor for monitoring changes in humidity and temperature, breath sensing and ethanol contamination by introducing an MoS 2 –Cu 2 S hybrid on cellulose paper via the hydrothermal method. 118 Using chemical modification for improving the response speed of paper-based humidity sensors, Guan et al 119 introduced glycidyl trimethyl ammonium chloride (EPTAC) on the cellulose fibers of printing paper, resulting in a decreased in the response time to 25 s compared with that of the blank paper of 101 s. The resultant sensor exhibited multifunctional applications in respiratory monitoring, non-contact switch and skin humidity monitoring. 119…”

Section: Cellulose-based Papermentioning

confidence: 99%

“…118 Using chemical modification for improving the response speed of paper-based humidity sensors, Guan et al 119 introduced glycidyl trimethyl ammonium chloride (EPTAC) on the cellulose fibers of printing paper, resulting in a decreased in the response time to 25 s compared with that of the blank paper of 101 s. The resultant sensor exhibited multifunctional applications in respiratory monitoring, non-contact switch and skin humidity monitoring. 119…”

Section: Cellulose-based Papermentioning

confidence: 99%

The gorgeous transformation of paper: from cellulose paper to inorganic paper to 2D paper materials with multifunctional properties

Dai

Guo

2022

J. Mater. Chem. A

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“…Similar to the human skin, tactile sensors play the important roles of discerning environmental conditions for robots. − Robotic tactile sensors mainly detect related parameters generated by direct contact with the external environment, including contact force, − strain, − humidity, , temperature, , and so on. In recent years, with the rapid advances in materials science and device fabrication technologies, higher requirements of the tactile sensing system are put forward, including multimodal sensing, , device miniaturization, large sensing range, high sensitivity, and flexibility.…”

Section: Introductionmentioning

confidence: 99%

Multidimensional Force Sensors Based on Triboelectric Nanogenerators for Electronic Skin

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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The ability to detect multidimensional forces is highly desired for electronic skin (E-skin) sensors. Here, based on single-electrode-mode triboelectric nanogenerators (S-TENGs), fully elastic E-skin that can simultaneously sense normal pressure and shear force has been proposed. With the hemispherical curve-structure design and further structural optimization, the pressure sensor exhibits a high linearity and sensitivity of 144.8 mV/kPa in the low-pressure region. By partitioning the lower tribolayer into two symmetric parts, a multidimensional force sensor has been fabricated in which the output voltage sum and ratio of the two S-TENGs can be used for normal pressure and shear force sensing, respectively. When the multidimensional force sensors are mounted at a two-fingered robotic manipulator, the change of the grabbing state can be recognized, indicating that the sensor may have great application potential in tactile sensing for robotic manipulation, human–robot interactions, environmental awareness, and object recognition.

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Flexible humidity sensor based on modified cellulose paper

Cited by 107 publications

References 62 publications

Respiratory Monitoring by Ultrafast Humidity Sensors with Nanomaterials: A Review

Respiratory Monitoring by Ultrafast Humidity Sensors with Nanomaterials: A Review

The gorgeous transformation of paper: from cellulose paper to inorganic paper to 2D paper materials with multifunctional properties

Multidimensional Force Sensors Based on Triboelectric Nanogenerators for Electronic Skin

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