Highly responsive and stable Y3+ doped NiMg–ferrite thick films as an efficient humidity sensor

2016 ◽  
Vol 40 (2) ◽  
pp. 1720-1728 ◽  
Author(s):  
Pratibha Rao ◽  
Rajeev C. Chikate ◽  
Sunita Bhagwat
Keyword(s):  
Thick Film ◽  
Recovery Time ◽  
Humidity Sensor ◽  
Thick Films ◽  
Fast Response ◽  
Response Recovery ◽  
Hysteresis Characteristics ◽  
Screen Printed

Fast response–recovery time with less hysteresis characteristics exhibited by a screen printed Ni0.7Mg0.3Y0.1Fe1.9O4 thick film humidity sensor.

Using Palladium Nanocubes on ZnO Nanostructures in Hydrogen Gas Sensor for Fast Response and Recovery Time

2021 ◽  
Vol 21 (4) ◽  
pp. 2495-2499
Author(s):  
Hoang Si Hong ◽  
Tran Vinh Hoang
Keyword(s):  
Gas Sensor ◽  
Recovery Time ◽  
Fast Response ◽  
Hydrogen Gas ◽  
Zno Nanostructures ◽  
Response Recovery ◽  
Sensor Structure ◽  
Recovery Times ◽  
Response And Recovery ◽  
Robust Sensing

We developed a novel sensor structure by synthesizing Pd nanocubes (NCs) decorated on ZnO nanostructures (NSs) applied to resistive-type H2 gas sensor with micro-length in sensing channel. The ZnO NSs were selectively grown between micro-size finger-like interdigital electrodes through microelectromechanical technology. The novel H2 sensor structure with the sensing channel was reduced to micro-size by this proposed method to obtain a sensor with fast response/recovery time. The as-prepared structure exhibited robust sensing performance with a response of 11% at optimal temperature of 150 °C, good linearity, and fast response/recovery time within 10 s. The speed of chemisorption through the diffusion pathway in Pd NCs combined with micro-length in sensing channel in sensor showed fast response and recovery times of 9 and 15 s, respectively, toward 10,000 ppm (1%) H2 at 150 °C. The result showed approximate linearity response in H2 concentration range of 5÷10,000 ppm and a large operating temperature range from room temperature to 200 °C.

scholarly journals Impact of Doping on GO: Fast Response–Recovery Humidity Sensor

ACS Omega ◽  
2017 ◽  
Vol 2 (3) ◽  
pp. 842-851 ◽  
Author(s):  
Keerti Rathi ◽  
Kaushik Pal
Keyword(s):  
Humidity Sensor ◽  
Fast Response ◽  
Response Recovery

Synthesized of Highly Sensitive Tin (IV)-Doped Zinc Oxide Humidity Sensor

2015 ◽  
Vol 1109 ◽  
pp. 559-563
Author(s):  
Ahmad Syakirin Ismail ◽  
Mohd Firdaus Malek ◽  
Muhammad Amir Ridhwan Abdullah ◽  
Mohamad Hafiz Mamat ◽  
M. Rusop
Keyword(s):  
Zinc Oxide ◽  
Recovery Time ◽  
Humidity Sensor ◽  
Sol Gel ◽  
High Sensitivity ◽  
Average Diameter ◽  
Undoped Sample ◽  
Immersion Method ◽  
Response Recovery ◽  
Highly Sensitive

High sensitivity Tin (IV) (Sn) - doped zinc oxide (ZnO) humidity sensor was deposited using sol-gel immersion method. The Sn-doped sample was deposited on glass substrate and undoped sample was also prepared to seem the improvement made through doping process. The analyses showed that the sensor’s morphology has become more porous and having lower average diameter of nanorods, high conductivity and higher response, recovery time, and sensitivity. The sensitivity of the sensor increased from 2 to 4 by doping with Sn.

scholarly journals Correction to “Impact of Doping on GO: Fast Response–Recovery Humidity Sensor”

ACS Omega ◽  
2018 ◽  
Vol 3 (3) ◽  
pp. 3164-3164
Author(s):  
Keerti Rathi ◽  
Kaushik Pal
Keyword(s):  
Humidity Sensor ◽  
Fast Response ◽  
Response Recovery

Reduced Graphene Oxide Screen Printed Thick Film as NO2 Gas Sensor at Low Temperature

2021 ◽  
Vol 1167 ◽  
pp. 43-55
Author(s):  
Anil Patil ◽  
Umesh Tupe ◽  
Arun V. Patil
Keyword(s):  
Graphene Oxide ◽  
Thick Film ◽  
Reduced Graphene Oxide ◽  
Gas Sensing ◽  
Thick Films ◽  
Research Work ◽  
Fast Response ◽  
Gas Sensitivity ◽  
Reduced Graphene ◽  
Sensitivity And Selectivity

Most of the recent reduced graphene oxide (rGO) based sensors shows gas sensitivity above 50o to 150°C. The present investigation deals with the gas sensing at 50°C temperature. In the present research work, thick film sensors of rGO were developed on glass substrate by using standard screen-printing technique. The silver paste of rGO was used to make electrodes for contact on thick films for the electrical and gas sensing system. The electrical properties of rGO thick films such as resistivity, activation energy and temperature coefficient were studied. The resistivity of rGO thick films was found to be 84.84 Ω/m. The morphological, elemental and structural properties of rGO thick films were analyzed by SEM, EDS and XRD techniques respectively. The crystallite size of rGO thick films was found as 28.42 nm by using Scherer’s formula. The rGO thick films were prepared and exposed to Ethanol, NH3, NO2 and LPG gases to determine sensitivity and selectivity. The sensitivity of NO2 has been found to be maximum among other exposed gases. The maximum sensitivity of NO2 gas was 92.55 % at 50 °C found with fast response (~ 11 sec) and recovery (~ 19 sec) time.

Improved Response/Recovery Time and Sensitivity of SnSe Nanosheet Humidity Sensor by LiCl Incorporation

2020 ◽  
Vol 6 (5) ◽  
pp. 1901330
Author(s):  
Kaimin Zhu ◽  
Yong Tang ◽  
Xiangli Zhong ◽  
Li Xiong ◽  
Yong Zhang ◽  
...  
Keyword(s):  
Recovery Time ◽  
Humidity Sensor ◽  
Response Recovery

scholarly journals Humidity Sensors with Shielding Electrode Under Interdigitated Electrode

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 659 ◽  
Author(s):  
Hong Liu ◽  
Qi Wang ◽  
Wenjie Sheng ◽  
Xubo Wang ◽  
Kaidi Zhang ◽  
...  
Keyword(s):  
Humidity Sensor ◽  
High Sensitivity ◽  
Fast Response ◽  
Capacitive Sensors ◽  
Humidity Sensors ◽  
Interdigitated Electrode ◽  
Response Recovery ◽  
Chip Fabrication ◽  
Good Agreement ◽  
Capacitive Humidity Sensor

Recently, humidity sensors have been investigated extensively due to their broad applications in chip fabrication, health care, agriculture, amongst others. We propose a capacitive humidity sensor with a shielding electrode under the interdigitated electrode (SIDE) based on polyimide (PI). Thanks to the shielding electrode, this humidity sensor combines the high sensitivity of parallel plate capacitive sensors and the fast response of interdigitated electrode capacitive sensors. We use COMSOL Multiphysics to design and optimize the SIDE structure. The experimental data show very good agreement with the simulation. The sensitivity of the SIDE sensor is 0.0063% ± 0.0002% RH. Its response/recovery time is 20 s/22 s. The maximum capacitance drift under different relative humidity is 1.28% RH.

Pt-decorated hierarchical SiC nanofibers constructed by intertwined SiC nanorods for high-temperature ammonia gas sensing

2019 ◽  
Vol 7 (24) ◽  
pp. 7299-7307 ◽  
Author(s):  
Nan Wu ◽  
Bing Wang ◽  
Cheng Han ◽  
Qiong Tian ◽  
Chunzhi Wu ◽  
...  
Keyword(s):  
High Temperature ◽  
Recovery Time ◽  
Gas Sensing ◽  
Fast Response ◽  
Ammonia Gas ◽  
Response Recovery

Hierarchical Pt/HSiC nanofibers exhibited a fast response/recovery time of 2 s/5 s towards 500 ppm NH3 at 500 °C.

scholarly journals Nonporous Inorganic Nanoparticle-Based Humidity Sensor: Evaluation of Humidity Hysteresis and Response Time

Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 3858
Author(s):  
Shinya Kano ◽  
Harutaka Mekaru
Keyword(s):  
Response Time ◽  
Humidity Sensor ◽  
Silica Nanoparticle ◽  
Fast Response ◽  
Inorganic Nanoparticles ◽  
Humidity Sensors ◽  
Inorganic Nanoparticle ◽  
Response Recovery ◽  
Recovery Times ◽  
Nanoparticle Film

Fast-response humidity sensors using nanomaterials are attractive and have been intensively studied. Among the various nanomaterials, nonporous inorganic nanoparticles are suitable for use in humidity sensitive films for sensors. Here, we focus on a nonporous inorganic nanoparticle film and investigate a humidity sensor using the film. Hysteresis error and a dynamic response to a change of humidity are fundamental specifications of humidity sensors. A humidity sensor using a 50 nm silica nanoparticle film shows a hysteresis error of 2% at 85% RH and a response/recovery time of 2.8/2.3 s in 30% RH to 70% RH. We also summarize response/recovery times and hysteresis errors of state-of-the-art humidity sensors. As compared to those of commercial sensors and porous nanoparticle-based sensors evaluated using saturated salt solutions, the fabricated sensor shows a comparative hysteresis error and shorter response time.

scholarly journals Modification of Thick-Film Conductors Used in IP Technology for Reduction of Warpage during Co-Firing of LTCC (Low Temperature Co-Fired Ceramic) Modules

2007 ◽  
Vol 336-338 ◽  
pp. 746-749 ◽  
Author(s):  
Hansu Birol ◽  
Thomas Maeder ◽  
Peter Ryser
Keyword(s):  
Low Temperature ◽  
Thick Film ◽  
Thick Films ◽  
Shrinkage Rate ◽  
Major Difficulty ◽  
Flat Surfaces ◽  
Temperature Firing ◽  
Differential Shrinkage ◽  
Printed Materials ◽  
Screen Printed

LTCC technology offers low temperature firing (<900 °C) of a materials system, which is based on LTCC sheets/tapes and (ideally) compatible thick-film components. Screen-printed materials on LTCC tapes, such as conductor, resistor, inductor thick-films are co-fired (simultaneously fired), providing a highly-functional package. This comes along with additional benefits such as ease of LTCC tape structuring, fabrication of hermetic and complex 3-D structures, etc. The major difficulty encountered arises from the differential shrinkage rate of LTCC tape and thick-film components, which has to be avoided for fabrication of warpage-free, flat surfaces that is vital for membranes, beams, etc. Therefore the goal of this study is the reduction of deformation, by matching the shrinkage rate of conductor with that of LTCC, which is achieved by mixing the commercially-available paste with selected additives.

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