A High-Performance Nanocomposite Material Based on Functionalized Carbon Nanotube and Polymer for Gas Sensing Applications

2009 ◽  
Author(s):  
L. C. Wang ◽  
K. T. Tang ◽  
C. T. Kuo ◽  
S. R. Yang ◽  
Yuh Sung ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
High Performance ◽  
Gas Sensing ◽  
Nanocomposite Material ◽  
Sensing Applications ◽  
Functionalized Carbon Nanotube

scholarly journals Optimization of a Low-Power Chemoresistive Gas Sensor: Predictive Thermal Modelling and Mechanical Failure Analysis

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 783 ◽  
Author(s):  
Andrea Gaiardo ◽  
David Novel ◽  
Elia Scattolo ◽  
Michele Crivellari ◽  
Antonino Picciotto ◽  
...  
Keyword(s):  
Low Power ◽  
Failure Analysis ◽  
Gas Sensors ◽  
High Performance ◽  
Gas Sensing ◽  
Mechanical Failure ◽  
Sensing Applications ◽  
Theoretical Approaches ◽  
Sensing Material ◽  
Silicon Bulk

The substrate plays a key role in chemoresistive gas sensors. It acts as mechanical support for the sensing material, hosts the heating element and, also, aids the sensing material in signal transduction. In recent years, a significant improvement in the substrate production process has been achieved, thanks to the advances in micro- and nanofabrication for micro-electro-mechanical system (MEMS) technologies. In addition, the use of innovative materials and smaller low-power consumption silicon microheaters led to the development of high-performance gas sensors. Various heater layouts were investigated to optimize the temperature distribution on the membrane, and a suspended membrane configuration was exploited to avoid heat loss by conduction through the silicon bulk. However, there is a lack of comprehensive studies focused on predictive models for the optimization of the thermal and mechanical properties of a microheater. In this work, three microheater layouts in three membrane sizes were developed using the microfabrication process. The performance of these devices was evaluated to predict their thermal and mechanical behaviors by using both experimental and theoretical approaches. Finally, a statistical method was employed to cross-correlate the thermal predictive model and the mechanical failure analysis, aiming at microheater design optimization for gas-sensing applications.

scholarly journals Recent Advances in ZnO-Based Carbon Monoxide Sensors: Role of Doping

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4425
Author(s):  
Ana María Pineda-Reyes ◽  
María R. Herrera-Rivera ◽  
Hugo Rojas-Chávez ◽  
Heriberto Cruz-Martínez ◽  
Dora I. Medina
Keyword(s):  
Carbon Monoxide ◽  
High Performance ◽  
Gas Sensing ◽  
Experimental Studies ◽  
Electrical Performance ◽  
Long Term Stability ◽  
Sensing Applications ◽  
Recent Advances ◽  
Sensitivity And Selectivity ◽  
Doped Zno

Monitoring and detecting carbon monoxide (CO) are critical because this gas is toxic and harmful to the ecosystem. In this respect, designing high-performance gas sensors for CO detection is necessary. Zinc oxide-based materials are promising for use as CO sensors, owing to their good sensing response, electrical performance, cost-effectiveness, long-term stability, low power consumption, ease of manufacturing, chemical stability, and non-toxicity. Nevertheless, further progress in gas sensing requires improving the selectivity and sensitivity, and lowering the operating temperature. Recently, different strategies have been implemented to improve the sensitivity and selectivity of ZnO to CO, highlighting the doping of ZnO. Many studies concluded that doped ZnO demonstrates better sensing properties than those of undoped ZnO in detecting CO. Therefore, in this review, we analyze and discuss, in detail, the recent advances in doped ZnO for CO sensing applications. First, experimental studies on ZnO doped with transition metals, boron group elements, and alkaline earth metals as CO sensors are comprehensively reviewed. We then focused on analyzing theoretical and combined experimental–theoretical studies. Finally, we present the conclusions and some perspectives for future investigations in the context of advancements in CO sensing using doped ZnO, which include room-temperature gas sensing.

Nafion®/histidine functionalized carbon nanotube: High-performance fuel cell membranes

2013 ◽  
Vol 38 (14) ◽  
pp. 5894-5902 ◽  
Author(s):  
Mahsa S. Asgari ◽  
Manouchehr Nikazar ◽  
Payam Molla-abbasi ◽  
Mohammad Mahdi Hasani-Sadrabadi
Keyword(s):  
Carbon Nanotube ◽  
Fuel Cell ◽  
High Performance ◽  
Cell Membranes ◽  
Fuel Cell Membranes ◽  
Functionalized Carbon Nanotube

Multi-walled carbon nanotube arrays for gas sensing applications

2008 ◽  
Vol 19 (34) ◽  
pp. 345502 ◽  
Author(s):  
Suresh Rajaputra ◽  
Raghu Mangu ◽  
Patricia Clore ◽  
Dali Qian ◽  
Rodney Andrews ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Gas Sensing ◽  
Nanotube Arrays ◽  
Sensing Applications ◽  
Carbon Nanotube Arrays ◽  
Multi Walled Carbon Nanotube

scholarly journals A Separated Receptor/Transducer Scheme as Strategy to Enhance the Gas Sensing Performance Using Hematite–Carbon Nanotube Composite

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 3915 ◽  
Author(s):  
Nguyen Minh Hieu ◽  
Cao Van Phuoc ◽  
Truong Thi Hien ◽  
Nguyen Duc Chinh ◽  
Nguyen Duc Quang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Composite Structures ◽  
High Performance ◽  
Gas Sensing ◽  
Arc Discharge ◽  
Adsorption Sites ◽  
Thin Carbon ◽  
Sensor Structure ◽  
Ammonia Detection ◽  
Sensing Performance

Nanocomposite structures, where the Fe, Fe2O3, or Ni2O3 nanoparticles with thin carbon layers are distributed among a single-wall carbon nanotube (SWCNT) network, are architectured using the co-arc discharge method. A synergistic effect between the nanoparticles and SWCNT is achieved with the composite structures, leading to the enhanced sensing response in ammonia detection. Thorough studies about the correlation between the electric properties and sensing performance confirm the independent operation of the receptor and transducer in the sensor structure by nanoparticles and SWCNT, respectively. Nanoparticles with a large specific surface area provide adsorption sites for the NH3 gas molecules, whereas hole carriers are supplied by the SWCNT to complete the chemisorption process. A new chemo-resistive sensor concept and its operating mechanism is proposed in our work. Furthermore, the separated receptor and transducer sensor scheme allows us more freedom in the design of sensor materials and structures, thereby enabling the design of high-performance gas sensors.

scholarly journals An Analytical Conductance Model for Gas Detection Based on a Zigzag Carbon Nanotube Sensor

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 357
Author(s):  
Ali Hosseingholipourasl ◽  
Sharifah Hafizah Syed Ariffin ◽  
Mohammad Taghi Ahmadi ◽  
Seyed Saeid Rahimian Koloor ◽  
Michal Petrů ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Band Structure ◽  
Gas Adsorption ◽  
Gas Sensing ◽  
Electrical Conductance ◽  
Analytical Models ◽  
Adsorption Effect ◽  
Sensing Applications ◽  
New Energy ◽  
Gas Molecules

Recent advances in nanotechnology have revealed the superiority of nanocarbon species such as carbon nanotubes over other conventional materials for gas sensing applications. In this work, analytical modeling of the semiconducting zigzag carbon nanotube field-effect transistor (ZCNT-FET) based sensor for the detection of gas molecules is demonstrated. We propose new analytical models to strongly simulate and investigate the physical and electrical behavior of the ZCNT sensor in the presence of various gas molecules (CO2, H2O, and CH4). Therefore, we start with the modeling of the energy band structure by acquiring the new energy dispersion relation for the ZCNT and introducing the gas adsorption effects to the band structure model. Then, the electrical conductance of the ZCNT is modeled and formulated while the gas adsorption effect is considered in the conductance model. The band structure analysis indicates that, the semiconducting ZCNT experiences band gap variation after the adsorption of the gases. Furthermore, the bandgap variation influences the conductance of the ZCNT and the results exhibit increments of the ZCNT conductance in the presence of target gases while the minimum conductance shifted upward around the neutrality point. Besides, the I-V characteristics of the sensor are extracted from the conductance model and its variations after adsorption of different gas molecules are monitored and investigated. To verify the accuracy of the proposed models, the conductance model is compared with previous experimental and modeling data and a good consensus is observed. It can be concluded that the proposed analytical models can successfully be applied to predict sensor behavior against different gas molecules.

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