Dual MOSFET Hydrogen Sensors with Thermal Island Structure

2013 ◽  
Vol 543 ◽  
pp. 93-96
Author(s):  
Bum Joon Kim ◽  
Jung Sik Kim
Keyword(s):  
Gas Sensor ◽  
Hydrogen Sensor ◽  
Hydrogen Gas ◽  
Hydrogen Sensors ◽  
Optimal Point ◽  
Reference Device ◽  
Recovery Times ◽  
Dual Gate ◽  
Response And Recovery ◽  
Effect Transistor

A low powered hydrogen gas sensor of the FET (field-effect transistor) structure was designed, fabricated and characterized for self-compensation to outer environments. The dual-gate FET hydrogen sensor was integrated with a micro-heater and two Pt-gate FETs; a sensing device for hydrogen detection, and a reference device as an electrical compensator. The identical output between the sensitive-FET and reference-FET was stable at temperatures ranging from room temperature to 250°C due to the same temperature dependence of the currentvoltage (IV) characteristics. The Pt-FET sensor showed stable responses to hydrogen at a range of operation temperatures. The optimal point in the micro-heater operation for 5,000 ppm H2 gas injection was approximately 150°C. The highest sensitivity was 0.112 mA, and the response and recovery times were 18 sec and 19 sec, respectively. The low-power MOSFET gas sensor was found to be suitable for applications in portable gas monitoring units and automobiles.

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.

Dual-Gate Field-Effect Transistor Hydrogen Gas Sensor with Thermal Compensation

2010 ◽  
Vol 49 (2) ◽  
pp. 024206 ◽  
Author(s):  
Keiji Tsukada ◽  
Masatoshi Kariya ◽  
Tomiharu Yamaguchi ◽  
Toshihiko Kiwa ◽  
Hironobu Yamada ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Hydrogen Gas ◽  
Thermal Compensation ◽  
Dual Gate ◽  
Effect Transistor

scholarly journals Room Temperature Hydrogen Gas Sensing via Reversible Hydrogenation of Electrochemically Deposited Polycarbazole on Interdigitated Pt Transducers

Sensors ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 1098
Author(s):  
Agnieszka Stolarczyk ◽  
Tomasz Jarosz ◽  
Marcin Procek
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Hydrogen Gas ◽  
Hydrogen Sensors ◽  
Receptor Structure ◽  
Pt Electrodes ◽  
Electrochemically Deposited ◽  
Recovery Times ◽  
Response And Recovery ◽  
Cost Efficient

In this study, polycarbazole (PCz) is presented as a receptor structure for chemoresistive hydrogen sensors. The fabrication of the proposed sensors via electropolymerisation of PCz on interdigitated Pt electrodes is an inexpensive, cost-efficient, and repeatable method. Preliminary results presented in this work show that PCz-based sensors are sensitive to hydrogen gas in the range of 1–4% in air at room temperature. Notably, responses are both relatively high (from approximately 280% for 1% of H2) and rapid (response and recovery times for 1% H2 from 5 s and up to 32 s, respectively). Results of PCz structures on Pt and Au electrodes prove that the application of Pt electrodes is crucial for observation of sensing effect. A sensing mechanism based on reversible hydrogenation of PCz is proposed to explain the sensor operating principles.

Development of a Pd/Cu nanowires coated SAW hydrogen gas sensor with fast response and recovery

2019 ◽  
Vol 287 ◽  
pp. 157-164 ◽  
Author(s):  
Wen Wang ◽  
Xueli Liu ◽  
Shengchao Mei ◽  
Yana Jia ◽  
Mengwei Liu ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Fast Response ◽  
Hydrogen Gas ◽  
Cu Nanowires ◽  
Response And Recovery

scholarly journals Enhanced Hydrogen Detection in ppb-Level by Electrospun SnO2-Loaded ZnO Nanofibers

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 726 ◽  
Author(s):  
Jae-Hyoung Lee ◽  
Jin-Young Kim ◽  
Jae-Hun Kim ◽  
Sang Kim
Keyword(s):  
Gas Sensor ◽  
High Performance ◽  
Hydrogen Gas ◽  
Hydrogen Sensors ◽  
Excellent Performance ◽  
Electrospinning Technique ◽  
Hydrogen Sensing ◽  
Working Temperature ◽  
Highly Sensitive ◽  
Zno Nanofibers

High-performance hydrogen sensors are important in many industries to effectively address safety concerns related to the production, delivering, storage and use of H2 gas. Herein, we present a highly sensitive hydrogen gas sensor based on SnO2-loaded ZnO nanofibers (NFs). The xSnO2-loaded (x = 0.05, 0.1 and 0.15) ZnO NFs were fabricated using an electrospinning technique followed by calcination at high temperature. Microscopic analyses demonstrated the formation of NFs with expected morphology and chemical composition. Hydrogen sensing studies were performed at various temperatures and the optimal working temperature was selected as 300 °C. The optimal gas sensor (0.1 SnO2 loaded ZnO NFs) not only showed a high response to 50 ppb hydrogen gas, but also showed an excellent selectivity to hydrogen gas. The excellent performance of the gas sensor to hydrogen gas was mainly related to the formation of SnO2-ZnO heterojunctions and the metallization effect of ZnO.

Wearable colorimetric sensing fiber based on polyacrylonitrile with PdO@ZnO hybrids for the application of detecting H2 leakage

2020 ◽  
Vol 90 (19-20) ◽  
pp. 2198-2211
Author(s):  
Sung-Ho Hwang ◽  
Young Kwang Kim ◽  
Soon Moon Jeong ◽  
Changsoon Choi ◽  
Ka Young Son ◽  
...  
Keyword(s):  
Color Change ◽  
Hydrogen Sensor ◽  
Hydrogen Gas ◽  
Hybrid Nanoparticles ◽  
Hydrogen Sensors ◽  
Colorimetric Sensing ◽  
Hydrogen Sensing ◽  
Detection Systems ◽  
Sensing Material ◽  
Novel Method

A colorimetric hydrogen sensor has great potential for accurately detecting and monitoring the leakage of hydrogen gas on account of its fast color change in contact with hydrogen gas. However, for the practical application of the sensor, such as in gas detection systems in clothing, the flexibility and stability of the sensor need to be improved. Here, we present a novel method to fabricate a flexible colorimetric hydrogen sensor with the stable embedment of sensing material. To improve the flexibility and stability of the sensor, polyacrylonitrile nanofiber containing palladium oxide and zinc oxide hybrid nanoparticles was prepared by electrospinning. The flexible colorimetric hydrogen sensor can detect 1000 ppm hydrogen gas with excellent selectivity within 2 min. We also suggest film and yarn-type flexible colorimetric hydrogen sensors for industrial and wearable applications. A laminating process was used to prepare the film. In contrast, twisting and polydimethylsiloxane coating were used to prepare the yarn-type flexible colorimetric hydrogen sensor. Compared with a flexible colorimetric hydrogen-sensing nanofiber, the film and yarn show identical sensitivity for detecting a hydrogen leakage. These applications of hydrogen sensors could be a new insight into the design of a flexible sensor for detecting hydrogen leakage with the naked eye.

On an Electroless Plating (EP)-Based Pd/AlGaN/GaN Heterostructure Field-Effect Transistor (HFET)-Type Hydrogen Gas Sensor

2012 ◽  
Vol 33 (6) ◽  
pp. 788-790 ◽  
Author(s):  
Chien-Chang Huang ◽  
Huey-Ing Chen ◽  
Tai-You Chen ◽  
Chi-Shiang Hsu ◽  
Chun-Chia Chen ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Electroless Plating ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Hydrogen Gas ◽  
Effect Transistor ◽  
Gan Heterostructure

An ultra-sensitive hydrogen gas sensor using reduced graphene oxide-loaded ZnO nanofibers

2015 ◽  
Vol 51 (84) ◽  
pp. 15418-15421 ◽  
Author(s):  
Zain Ul Abideen ◽  
Hyoun Woo Kim ◽  
Sang Sub Kim
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensor ◽  
Hydrogen Sensor ◽  
Hydrogen Gas ◽  
High Response ◽  
Low Concentration ◽  
Reduced Graphene ◽  
Zno Nanofibers

An extremely high response of about 866 at a low concentration of 100 ppb was obtained by developing a hydrogen sensor of reduced graphene oxide-loaded ZnO nanofibers.

scholarly journals Palladium thin films for plasmonic hydrogen gas sensing

2019 ◽  
Vol 11 (2) ◽  
pp. 56
Author(s):  
Erwin Maciak
Keyword(s):  
Thin Films ◽  
Surface Plasmon Resonance ◽  
Low Temperature ◽  
Gas Sensor ◽  
Room Temperature ◽  
Fiber Optic ◽  
Hydrogen Sensor ◽  
Hydrogen Gas ◽  
Sensors And Actuators ◽  
Hydrogen Sensing

In this study, I prepared BK7 glass slides coated by palladium (Pd) layer by PVD technique. These samples have been employed as plasmon active structures in classic Kretschmann-based SPR set-up. The application of H2 sensing structures based on palladium plasmonic active thin films have been tested and investigated. Hydrogen sensing properties of Pd films were investigated at room temperature The reflectances of p-polarized light from Pd thin films as a function of angle of incidence and wavelength were measured in synthetic air (or nitrogen) and in gas mixtures including hydrogen. Variations of the reflectance in the presence of hydrogen gas at room temperature revealed that the samples can sense hydrogen in a wide range of concentration (0–2% vol/vol) without saturation behavior. The dynamic properties with various concentration of H2 at low temperature and dry gas mixtures was investigated and the effects of these factors on the hydrogen sensing properties were analyzed. Full Text: PDF ReferencesG. Korotcenkov, Handbook of Gas Sensor Materials: Properties, Advantages, and Shortcomings for Applications (Springer, New York 2013). CrossRef W. Jakubik, M. Urbanczyk, E. Maciak, "SAW hydrogen gas sensor based on WO3 and Pd nanostructures", Procedia Chemistry 1 (1), 200 (2009). CrossRef W. Jakubik, M. Urbanczyk, E. Maciak, T. Pustelny, "Bilayer Structures of NiOx and Pd in Surface Acoustic Wave and Electrical Gas Sensor Systems", Acta Physica Polonica A 116(3), 315 (2009). CrossRef E. Maciak, Z. Opilski, "Pd/V2O5 fiber optic hydrogen gas sensor", J. Phys. France IV 129, 137 (2005). CrossRef E. Maciak,. "Fiber optic sensor for H2 gas detection in the presence of methane based on Pd/WO3 low-coherence interferometric structure", Proc. SPIE 10455, UNSP 104550W (2017). CrossRef X. Bevenot, A. Truillet, C. Veillas, H. Gagnaire, M. Clement, "Hydrogen leak detection using an optical fibre sensor for aerospace applications", Sens. Actuators B 67, 57 (2000). CrossRef J. Homola, S.S. Yee, G. Gauglitz, "Surface plasmon resonance sensors: review", Sensors and Actuators B 54, 3 (1999). CrossRef H. Raether, Surface plasmons on smooth and rough surfaces and on gratings (Springer-Verlag, Berlin-Heidelberg 1988). CrossRef P. Tobiska, O. Hugon, A. Trouillet, H.Gagnarie, "An integrated optic hydrogen sensor based on SPR on palladium", Sensors and Actuators, B 74, 168 (2001). CrossRef Z. Opilski, E. Maciak, "Optical hydrogen sensor employing the phenomenon of the surface plasmons resonance in the palladium layer", Proc. SPIE 5576, 202 (2004). CrossRef T. Pustelny, E. Maciak, Z. Opilski, A. Piotrowska, E. Papis, K. Golaszewska, "Investigation of the ZnO sensing structure on NH3 action by means of the surface plasmon resonance method", European Physical Journal-Special Topics 154, 165 (2008). CrossRef E. Maciak, M. Procek, K. Kępska, A. Stolarczyk, "Study of optical and electrical properties of thin films of the conducting comb-like graft copolymer of polymethylsiloxane with poly(3-hexyltiophene) and poly(ethylene) glycol side chains for low temperature NO2 sensing", Thin Solid Films 618, 277 (2016). CrossRef

Sign in / Sign up

Export Citation Format

Share Document