scholarly journals Development of La3+Doped CeO2Thick Film Humidity Sensors

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Chunjie Wang ◽  
Aihua Zhang ◽  
Hamid Reza Karimi
Keyword(s):  
Relative Humidity ◽  
High Performance ◽  
Humidity Sensor ◽  
Humidity Sensors ◽  
Response Recovery ◽  
Relative Humidity Range ◽  
Response And Recovery ◽  
Sensitive Characteristics ◽  
Humidity Range ◽  
Maximum Humidity

The humidity sensitive characteristics of the sensor fabricated from 10 mol% La2O3doped CeO2nanopowders with particle size 17.26 nm synthesized via hydrothermal method were investigated at different frequencies. It was found that the sensor shows high humidity sensitivity, rapid response-recovery characteristics, and narrow hysteresis loop at 100 Hz in the relative humidity range from 11% to 95%. The impedance of the sensor decreases by about five orders of magnitude as relative humidity increases. The maximum humidity hysteresis is about 6% RH, and the response and recovery time is 12 and 13 s, respectively. These results indicate that the nanosized La2O3doped CeO2powder has potential application as high-performance humidity sensor.

Highly chemoresistive humidity sensing using poly(ionic liquid)s

2016 ◽  
Vol 52 (54) ◽  
pp. 8417-8419 ◽  
Author(s):  
Lingling Wang ◽  
Xiaochuan Duan ◽  
Wuyuan Xie ◽  
Qiuhong Li ◽  
Taihong Wang
Keyword(s):  
Ionic Liquid ◽  
Relative Humidity ◽  
High Performance ◽  
Humidity Sensor ◽  
High Sensitivity ◽  
Fast Response ◽  
Humidity Sensors ◽  
Humidity Sensing ◽  
Good Repeatability ◽  
Poly Ionic Liquid

A novel resistance type humidity sensor was fabricated using poly(ionic liquid)s, which exhibited high sensitivity, fast response, small hysteresis and good repeatability at a relative humidity (RH) in the range of 11–98%, making poly(ionic liquid)s as promising sensing materials for high-performance humidity sensors.

scholarly journals Highly sensitive, room temperature operated gold nanowire-based humidity sensor: adoptable for breath sensing

RSC Advances ◽  
2022 ◽  
Vol 12 (2) ◽  
pp. 1157-1164
Author(s):  
Parag V. Adhyapak ◽  
Aishwarya M. Kasabe ◽  
Amruta D. Bang ◽  
Jalindar Ambekar ◽  
Sulabha K. Kulkarni
Keyword(s):  
Relative Humidity ◽  
Room Temperature ◽  
Humidity Sensor ◽  
Gold Nanowire ◽  
Humidity Sensing ◽  
Highly Sensitive ◽  
Resistive Sensor ◽  
Relative Humidity Range ◽  
Humidity Range

A novel, highly sensitive gold nanowire (AuNW) resistive sensor is reported here for humidity sensing in the relative humidity range of 11% to 92% RH as well as for breath sensing.

Humidity Sensors Based on Nanostructured Materials

2006 ◽  
Vol 51 ◽  
pp. 197-200
Author(s):  
S. Krutovertsev ◽  
A. Tarasova ◽  
L. Krutovertseva ◽  
A. Zorin ◽  
O. Ivanova
Keyword(s):  
Relative Humidity ◽  
Nanostructured Materials ◽  
Humidity Sensor ◽  
Dew Point ◽  
Humidity Sensors ◽  
Humidity Range

Constraction and characteristics of sorption polymeric relative humidity sensors, sorption SiOx microhumidity sensors, and condensation type (dew point) sensors are compared. The characteristics of the sensors are examined in dew point range from -80 to +20oC. An integrated multifunctional humidity sensor, for measurements in wide humidity range at different conditions is developed. The sensors are intended for use in various branches of industry, and in scientific researches.

scholarly journals Stretchable and High-performance Sensor films Based on Nanocomposite of Polypyrrole/SWCNT/Silver Nanowire

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 696 ◽  
Author(s):  
Bu-Yeon Hwang ◽  
Wen Du ◽  
Hee-Jae Lee ◽  
Sungmin Kang ◽  
Masaki Takada ◽  
...  
Keyword(s):  
Relative Humidity ◽  
High Performance ◽  
Silver Nanowire ◽  
Hybrid Networks ◽  
Ammonia Gas ◽  
Single Walled Carbon Nanotube ◽  
Sensor Film ◽  
Relative Humidity Range ◽  
Polydimethylsiloxane Elastomer ◽  
Humidity Range

We report the fabrication of stretchable sensor films (SSF) using a composite of functionalized polypyrrole- single-walled carbon nanotube (SWCNT)-silver nanowire hybrid networks embedded into a cross-linked polydimethylsiloxane elastomer. The SSF exhibited low resistivity of 30 Ω/sq and an outstanding mechanical elasticity of up to 25% (no visible change in the sheet resistance after 100 cycle at stretching-release test of 25%). These SSFs were responsive to 1 ppm ammonia gas even at a low temperature of 40 °C with 20% relative humidity and also maintained reproducibility and reversibility when repeatedly exposed to ammonia gas more than 100 times. In addition, it was confirmed that the sensor film was hardly affected even at a relative humidity range of 20% to 80%.

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.

scholarly journals Boltzmann-Based Empirical Model to Calculate Volume Loss during Spirit Ageing

Beverages ◽  
2019 ◽  
Vol 5 (4) ◽  
pp. 60
Author(s):  
Noemí del Toro del Toro ◽  
Fredy Fong Casas ◽  
Julio Ayan Rial ◽  
Maria Caridad Portuondo González ◽  
Harold Crespo Sariol ◽  
...  
Keyword(s):  
Boltzmann Equation ◽  
Relative Humidity ◽  
Quercus Alba ◽  
Volume Loss ◽  
Air Humidity ◽  
White Oak ◽  
The Boltzmann Equation ◽  
Relative Humidity Range ◽  
Two Parameters ◽  
Humidity Range

The Boltzmann equation is applied to fit data of volume loss for evaporation (in %) during spirit ageing in northern white oak (Quercus Alba) standard barrels of 205 L (+/− 10 L) using a temperature and humidity controlled cellar. The Boltzmann equation satisfactory fitted to the experimental data of the volume loss against temperature at constant humidity. Two parameters of the Boltzmann equation showed a linear dependency on the relative humidity of the air, while the other two parameters exhibited a constant value independently of the air humidity. The found empirical mathematical model can be used to calculate the volume loss for evaporation of spirits (40% v/v of ethanol) during ageing in terms of relative humidity (range: 40%–95%) and temperature (range: 10–30 °C) with significant accuracy.

Sign in / Sign up

Export Citation Format

Share Document