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

RSC Advances ◽  
2020 ◽  
Vol 10 (15) ◽  
pp. 8910-8916 ◽  
Author(s):  
Gong Wang ◽  
Yang Zhang ◽  
Han Yang ◽  
Wei Wang ◽  
Yun-Zhi Dai ◽  
...  
Keyword(s):  
Humidity Sensor ◽  
Fast Response ◽  
Respiration Monitoring ◽  
Laser Printing

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

Cu(OH)2 nanowires/graphene oxide composites based QCM humidity sensor with fast-response for real-time respiration monitoring

2020 ◽  
Vol 304 ◽  
pp. 127313 ◽  
Author(s):  
Han Fang ◽  
Jianbin Lin ◽  
Zhixiang Hu ◽  
Huan Liu ◽  
Zirong Tang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Real Time ◽  
Humidity Sensor ◽  
Fast Response ◽  
Respiration Monitoring ◽  
Oxide Composites

scholarly journals Tin Disulfide-Coated Microfiber for Humidity Sensing with Fast Response and High Sensitivity

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 648
Author(s):  
Aijie Liang ◽  
Jingyuan Ming ◽  
Wenguo Zhu ◽  
Heyuan Guan ◽  
Xinyang Han ◽  
...  
Keyword(s):  
Humidity Sensor ◽  
Small Diameter ◽  
High Sensitivity ◽  
Large Change ◽  
Small Variation ◽  
Response Speed ◽  
Fast Response ◽  
Tin Disulfide ◽  
Recovery Times ◽  
Response And Recovery

Breath monitoring is significant in assessing human body conditions, such as cardiac and pulmonary symptoms. Optical fiber-based sensors have attracted much attention since they are immune to electromagnetic radiation, thus are safe for patients. Here, a microfiber (MF) humidity sensor is fabricated by coating tin disulfide (SnS2) nanosheets onto the surface of MF. The small diameter (~8 μm) and the long length (~5 mm) of the MF promise strong interaction between guiding light and SnS2. Thus, a small variation in the relative humidity (RH) will lead to a large change in optical transmitted power. A high RH sensitivity of 0.57 dB/%RH is therefore achieved. The response and recovery times are estimated to be 0.08 and 0.28 s, respectively. The high sensitivity and fast response speed enable our SnS2-MF sensor to monitor human breath in real time.

scholarly journals A Full-Range Flexible and Printed Humidity Sensor Based on a Solution-Processed P(VDF-TrFE)/Graphene-Flower Composite

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1915
Author(s):  
Shenawar Ali Khan ◽  
Muhammad Saqib ◽  
Muhammad Muqeet Rehman ◽  
Hafiz Mohammad Mutee Ur Rehman ◽  
Sheik Abdur Rahman ◽  
...  
Keyword(s):  
Active Layer ◽  
Humidity Sensor ◽  
High Reliability ◽  
Full Range ◽  
High Sensitivity ◽  
Fast Response ◽  
Considerable Change ◽  
Relative Humidity Range ◽  
Response And Recovery ◽  
Proportional Relationship

A novel composite based on a polymer (P(VDF-TrFE)) and a two-dimensional material (graphene flower) was proposed as the active layer of an interdigitated electrode (IDEs) based humidity sensor. Silver (Ag) IDEs were screen printed on a flexible polyethylene terephthalate (PET) substrate followed by spin coating the active layer of P(VDF-TrFE)/graphene flower on its surface. It was observed that this sensor responds to a wide relative humidity range (RH%) of 8–98% with a fast response and recovery time of 0.8 s and 2.5 s for the capacitance, respectively. The fabricated sensor displayed an inversely proportional response between capacitance and RH%, while a directly proportional relationship was observed between its impedance and RH%. P(VDF-TrFE)/graphene flower-based flexible humidity sensor exhibited high sensitivity with an average change of capacitance as 0.0558 pF/RH%. Stability of obtained results was monitored for two weeks without any considerable change in the original values, signifying its high reliability. Various chemical, morphological, and electrical characterizations were performed to comprehensively study the humidity-sensing behavior of this advanced composite. The fabricated sensor was successfully used for the applications of health monitoring and measuring the water content in the environment.

High-performance humidity sensors from Ni(SO4)0.3(OH)1.4 nanobelts

Nanoscale ◽  
2014 ◽  
Vol 6 (12) ◽  
pp. 6521-6525 ◽  
Author(s):  
Ming Zhuo ◽  
Yuejiao Chen ◽  
Tao Fu ◽  
Haonan Zhang ◽  
Zhi Xu ◽  
...  
Keyword(s):  
High Performance ◽  
Humidity Sensor ◽  
High Sensitivity ◽  
Fast Response ◽  
Humidity Sensors ◽  
Term Stability ◽  
Long Term Stability

Ni(SO4)0.3(OH)1.4 nanobelts are utilized in a humidity sensor by a facile method. The nanobelt based sensor shows a high sensitivity, fast response and long-term stability in the sensing process.

A highly selective and fast-response photoluminescence humidity sensor based on F− decorated NH2-MIL-53(Al) nanorods

2017 ◽  
Vol 5 (36) ◽  
pp. 9465-9471 ◽  
Author(s):  
Ting Lu ◽  
Hongjie Song ◽  
Xiaoqun Dong ◽  
Jianyu Hu ◽  
Yi Lv
Keyword(s):  
Humidity Sensor ◽  
Fast Response

NH2-MIL-53(Al) nanorods studded with F− were successfully synthesized via coordination modulation with HF as a modulator.

scholarly journals Capacitive type Humidity Sensor based on PANI decorated Cu-Zns Porous Micropshere

2020 ◽  
Author(s):  
Jolly Bhadra ◽  
Hemalatha Parangusan ◽  
Zubair Ahmad ◽  
Shoaib Mallick ◽  
Farid Touati ◽  
...  
Keyword(s):  
Humidity Sensor ◽  
In Situ Polymerization ◽  
Fast Response ◽  
Polymerization Process ◽  
Average Response ◽  
Surface Absorption ◽  
Absorption Properties ◽  
Recovery Times ◽  
Response And Recovery

PANI coated Cu-ZnS porous microsphere structures have been synthesized by hydrothermal method and in-situ polymerization process. The synthesized composite is characterized by different techniques in order to study the structural, morphological and surface absorption properties. The experimental observation demonstrates that the PANI/1%Cu-ZnS composite has better sensitivity, fast response and good stability as compared to pure PANI and other PANI/CuZnS compositions. Finally, PANI/1% Cu-ZnS composite has been found to be optimized for the humidity sensors due to its well-distributed roughness, porosity and hydrophilicity. The average response and recovery times of the PANI/1% Cu-ZnS are found to be 42 s and 24 s, respectively, which outperform recent results.

Fast-response ionogel humidity sensor for real-time monitoring of breathing rate

2019 ◽  
Vol 3 (3) ◽  
pp. 484-491 ◽  
Author(s):  
Songhua Xiao ◽  
Jianxia Nie ◽  
Rou Tan ◽  
Xiaochuan Duan ◽  
Jianmin Ma ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Real Time ◽  
Humidity Sensor ◽  
Fast Response ◽  
Breathing Rate ◽  
Real Time Monitoring ◽  
Silica Network ◽  
Humidity Sensors ◽  
Human Breath

Ionogel-based chemoresistive humidity sensors have been successfully fabricated through ionothermal assembly of ionic liquids into a silica network, which exhibited superior humidity performances. Fast substantial impedance changes were observed with changing humidity for real-time monitoring of human breath.

High-Sensitivity Wearable and Flexible Humidity Sensor Based on Graphene Oxide/Non-Woven Fabric for Respiration Monitoring

Langmuir ◽  
2020 ◽  
Vol 36 (32) ◽  
pp. 9443-9448 ◽  
Author(s):  
Yamei Wang ◽  
Liwen Zhang ◽  
Zhenwei Zhang ◽  
Pengyuan Sun ◽  
Huawei Chen
Keyword(s):  
Graphene Oxide ◽  
Humidity Sensor ◽  
High Sensitivity ◽  
Woven Fabric ◽  
Respiration Monitoring

A Fast Response Flexible Humidity Sensor based on PTFE Micropore Substrate

2019 ◽  
Author(s):  
Wenhao Chen ◽  
Zhenyu Wei ◽  
Jianqiu Huang ◽  
Zhenxiang Yi ◽  
Qing-An Huang
Keyword(s):  
Humidity Sensor ◽  
Fast Response
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