scholarly journals Boron-doped few-layer graphene nanosheet gas sensor for enhanced ammonia sensing at room temperature

RSC Advances ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 1007-1014 ◽  
Author(s):  
Shubhda Srivastava ◽  
Shubhendra K. Jain ◽  
Govind Gupta ◽  
T. D. Senguttuvan ◽  
Bipin Kumar Gupta
Keyword(s):  
Gas Sensor ◽  
Room Temperature ◽  
Gas Sensing ◽  
Graphene Nanosheet ◽  
Ammonia Sensing ◽  
Layer Graphene ◽  
Sensing Applications ◽  
Boron Doped ◽  
Few Layer Graphene

A boron-doped few-layer LPCVD graphene sensor is successfully designed and demonstrated for enhanced NH3 gas sensing applications.

scholarly journals Correction: Boron-doped few-layer graphene nanosheet gas sensor for enhanced ammonia sensing at room temperature

RSC Advances ◽  
2020 ◽  
Vol 10 (59) ◽  
pp. 35957-35957
Author(s):  
Shubhda Srivastava ◽  
Shubhendra K. Jain ◽  
Govind Gupta ◽  
T. D. Senguttuvan ◽  
Bipin Kumar Gupta
Keyword(s):  
Gas Sensor ◽  
Room Temperature ◽  
Graphene Nanosheet ◽  
Ammonia Sensing ◽  
Layer Graphene ◽  
Boron Doped ◽  
Few Layer Graphene

Correction for ‘Boron-doped few-layer graphene nanosheet gas sensor for enhanced ammonia sensing at room temperature’ by Shubhda Srivastava et al., RSC Adv., 2020, 10, 1007–1014. DOI: 10.1039/C9RA08707A

scholarly journals Wafer-scale few-layer graphene growth on Cu/Ni films for gas sensing applications

2020 ◽  
Vol 305 ◽  
pp. 127458 ◽  
Author(s):  
Geetanjali Deokar ◽  
Juan Casanova-Cháfer ◽  
Nitul S. Rajput ◽  
Cyril Aubry ◽  
Eduard Llobet ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Wafer Scale ◽  
Graphene Growth ◽  
Layer Graphene ◽  
Sensing Applications ◽  
Few Layer Graphene

NITROGEN DIOXIDE GAS SENSOR BASED ON COBALT AND NICKEL PHTHALOCYANINE WORKING AT ROOM TEMPERATURE

2011 ◽  
Vol 25 (31) ◽  
pp. 4190-4193
Author(s):  
A. M. DATIR ◽  
V. S. GHOLE ◽  
PANKAJ KOINKAR ◽  
S. D. CHAKANE
Keyword(s):  
Gas Sensor ◽  
Recovery Time ◽  
Room Temperature ◽  
Gas Sensing ◽  
Chemical Route ◽  
Nickel Phthalocyanine ◽  
Sensing Applications ◽  
Uv Visible ◽  
Pellet Form ◽  
Cobalt And Nickel

Cobalt and Nickel Phthalocyanines ( CoPc , NiPc ) were synthesised by chemical route. Phthalocyanines (Pcs) were characterized by different techniques such as, XRD, UV Visible, and FTIR. Samples in the pellet form were prepared for gas sensing applications. The effect of NO 2 at different concentrations in air at room temperature on the electrical conductivity of CoPc and NiPc has been studied. Sensitivity, response time and recovery time of sensors for different NO 2 concentrations were studied. The comparison of these materials as NO 2 gas sensor is discussed in this research paper.

Metal-oxide based ammonia gas sensors: A review

2020 ◽  
Vol 10 ◽  
Author(s):  
Priya Gupta ◽  
Savita Maurya ◽  
Narendra Kumar Pandey ◽  
Vernica Verma
Keyword(s):  
Metal Oxide ◽  
Metal Oxides ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Review Paper ◽  
Gas Sensing ◽  
Gas Sensitivity ◽  
Ammonia Gas ◽  
Ammonia Sensing ◽  
Ammonia Gas Sensors

: This review paper encompasses a study of metal-oxide and their composite based gas sensors used for the detection of ammonia (NH3) gas. Metal-oxide has come into view as an encouraging choice in the gas sensor industry. This review paper focuses on the ammonia sensing principle of the metal oxides. It also includes various approaches adopted for increasing the gas sensitivity of metal-oxide sensors. Increasing the sensitivity of the ammonia gas sensor includes size effects and doping by metal or other metal oxides which will change the microstructure and morphology of the metal oxides. Different parameters that affect the performances like sensitivity, stability, and selectivity of gas sensors are discussed in this paper. Performances of the most operated metal oxides with strengths and limitations in ammonia gas sensing application are reviewed. The challenges for the development of high sensitive and selective ammonia gas sensor are also discussed.

scholarly journals Properties of Silicone Rubber-Based Composites Reinforced with Few-Layer Graphene and Iron Oxide or Titanium Dioxide

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1550
Author(s):  
Vineet Kumar ◽  
Anuj Kumar ◽  
Minseok Song ◽  
Dong-Joo Lee ◽  
Sung-Soo Han ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Titanium Dioxide ◽  
Iron Oxide ◽  
Stress Relaxation ◽  
Silicone Rubber ◽  
Room Temperature ◽  
Relaxation Rates ◽  
Layer Graphene ◽  
Few Layer Graphene ◽  
Mechanical Actuation

The increasing demand for polymer composites with novel or improved properties requires novel fillers. To meet the challenges posed, nanofillers such as graphene, carbon nanotubes, and titanium dioxide (TiO2) have been used. In the present work, few-layer graphene (FLG) and iron oxide (Fe3O4) or TiO2 were used as fillers in a room-temperature-vulcanized (RTV) silicone rubber (SR) matrix. Composites were prepared by mixing RTV-SR with nanofillers and then kept for vulcanization at room temperature for 24 h. The RTV-SR composites obtained were characterized with respect to their mechanical, actuation, and magnetic properties. Fourier-transform infrared spectroscopy (FTIR) analysis was performed to investigate the composite raw materials and finished composites, and X-ray photoelectron spectroscopy (XPS) analysis was used to study composite surface elemental compositions. Results showed that mechanical properties were improved by adding fillers, and actuation displacements were dependent on the type of nanofiller used and the applied voltage. Magnetic stress-relaxation also increased with filler amount and stress-relaxation rates decreased when a magnetic field was applied parallel to the deformation axes. Thus, this study showed that the inclusion of iron oxide (Fe3O4) or TiO2 fillers in RTV-SR improves mechanical, actuation, and magnetic properties.

scholarly journals Transforming Pt-SnO2 Nanoparticles into Pt-SnO2 Composite Nanoceramics for Room-Temperature Hydrogen-Sensing Applications

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2123
Author(s):  
Ming Liu ◽  
Caochuang Wang ◽  
Pengcheng Li ◽  
Liang Cheng ◽  
Yongming Hu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Sintering Temperature ◽  
Sno2 Nanoparticles ◽  
Hydrogen Sensing ◽  
Sensing Applications ◽  
Nanostructured Metal Oxides ◽  
Low Dimensional ◽  
Sensing Characteristics ◽  
Nanostructured Metal

Many low-dimensional nanostructured metal oxides (MOXs) with impressive room-temperature gas-sensing characteristics have been synthesized, yet transforming them into relatively robust bulk materials has been quite neglected. Pt-decorated SnO2 nanoparticles with 0.25–2.5 wt% Pt were prepared, and highly attractive room-temperature hydrogen-sensing characteristics were observed for them all through pressing them into pellets. Some pressed pellets were further sintered over a wide temperature range of 600–1200 °C. Though the room-temperature hydrogen-sensing characteristics were greatly degraded in many samples after sintering, those samples with 0.25 wt% Pt and sintered at 800 °C exhibited impressive room-temperature hydrogen-sensing characteristics comparable to those of their counterparts of as-pressed pellets. The variation of room-temperature hydrogen-sensing characteristics among the samples was explained by the facts that the connectivity between SnO2 grains increases with increasing sintering temperature, and Pt promotes oxidation of SnO2 at high temperatures. These results clearly demonstrate that some low-dimensional MOX nanocrystals can be successfully transformed into bulk MOXs with improved robustness and comparable room-temperature gas-sensing characteristics.

scholarly journals Gold and ZnO-Based Metal-Semiconductor Network for Highly Sensitive Room-Temperature Gas Sensing

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 3815
Author(s):  
Renyun Zhang ◽  
Magnus Hummelgård ◽  
Joel Ljunggren ◽  
Håkan Olin
Keyword(s):  
Solar Cells ◽  
Gas Sensor ◽  
Network Structure ◽  
Room Temperature ◽  
Gas Sensing ◽  
Zno Nanowires ◽  
Gold Particles ◽  
Highly Sensitive ◽  
Semiconductor Electronics ◽  
New Type

Metal-semiconductor junctions and interfaces have been studied for many years due to their importance in applications such as semiconductor electronics and solar cells. However, semiconductor-metal networks are less studied because there is a lack of effective methods to fabricate such structures. Here, we report a novel Au–ZnO-based metal-semiconductor (M-S)n network in which ZnO nanowires were grown horizontally on gold particles and extended to reach the neighboring particles, forming an (M-S)n network. The (M-S)n network was further used as a gas sensor for sensing ethanol and acetone gases. The results show that the (M-S)n network is sensitive to ethanol (28.1 ppm) and acetone (22.3 ppm) gases and has the capacity to recognize the two gases based on differences in the saturation time. This study provides a method for producing a new type of metal-semiconductor network structure and demonstrates its application in gas sensing.

scholarly journals Enhancing room-temperature NO2 gas sensing performance based on a metal phthalocyanine/graphene quantum dot hybrid material

RSC Advances ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 5618-5628
Author(s):  
Wenkai Jiang ◽  
Xinwei Chen ◽  
Tao Wang ◽  
Bolong Li ◽  
Min Zeng ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Gas Sensor ◽  
Hybrid Material ◽  
High Performance ◽  
Room Temperature ◽  
Gas Sensing ◽  
Metal Phthalocyanine ◽  
Graphene Quantum Dot ◽  
Sensing Performance

A high performance gas sensor based on a metal phthalocyanine/graphene quantum dot hybrid material was fabricated for NO2 detection at room-temperature.

scholarly journals Room-Temperature Gating of Molecular Junctions Using Few-Layer Graphene Nanogap Electrodes

Nano Letters ◽  
2011 ◽  
Vol 11 (11) ◽  
pp. 4607-4611 ◽  
Author(s):  
Ferry Prins ◽  
Amelia Barreiro ◽  
Justus W. Ruitenberg ◽  
Johannes S. Seldenthuis ◽  
Núria Aliaga-Alcalde ◽  
...  
Keyword(s):  
Room Temperature ◽  
Molecular Junctions ◽  
Layer Graphene ◽  
Nanogap Electrodes ◽  
Few Layer Graphene
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