A5072317045- Gas Sensing Nanomaterials and Sensors
- Graphene research and applications
- Conducting polymers and applications
- nanoparticles nucleation surface interactions
- 2D Materials and Applications
- ZnO doping and properties
- Analytical Chemistry and Sensors
- Advanced Chemical Sensor Technologies
- Phase-change materials and chalcogenides
- Copper-based nanomaterials and applications
- Carbon Nanotubes in Composites
- Transition Metal Oxide Nanomaterials
- Boron and Carbon Nanomaterials Research
- Advanced biosensing and bioanalysis techniques
- Advanced Memory and Neural Computing
- Molecular Junctions and Nanostructures
- Chalcogenide Semiconductor Thin Films
- Advanced Thermoelectric Materials and Devices
- Gold and Silver Nanoparticles Synthesis and Applications
- Catalytic Processes in Materials Science
- Electrochemical sensors and biosensors
- Supercapacitor Materials and Fabrication
- Quantum Dots Synthesis And Properties
- Advanced Sensor and Energy Harvesting Materials
- Nanocluster Synthesis and Applications
Qatar University
2015-2024
United Arab Emirates University
2010-2014
IEC University
2012
MacDiarmid Institute for Advanced Materials and Nanotechnology
2005-2010
University of Canterbury
2005-2010
The dwindling air quality and diminishing fossil fuel reserves have led to an increase in the need for alternative sources of fuel. Biodiesel derived from animal/plant seems be attractive substitution. However, there are some shortcomings biodiesel like lower thermal efficiency, poor atomization, inferior heating value, higher molecular mass. One probable novel ways address this lacuna is by use nano based IC engine. present study performs endeavor improve performance emulsion qualities...
In this work, four armchair graphene nanoribbon (AGNR) based sensor materials were built using Atomistic ToolKit Virtual NanoLab (ATK-VNL) and utilized to detect carbon monoxide (CO) dioxide (CO2) gases. First, the effect of passivating AGNR on sensing performance toward CO CO2 gases has been investigated, where was passivated with hydrogen (H-AGNR) nitrogen (N-AGNR). The obtained results reflected no significant changes in adsorption parameters molecules H-AGNR N-AGNR. Particularly,...
Exposure to nitrogen oxides (NOx) has been reported seriously affect the respiratory systems. More precisely, breathing NOx may lead appearance of asthma symptoms, and also result in infection with over long intervals. This study is devoted finding novel systems detect nitric oxide (NO) dioxide (NO2) improved sensitivity. Consequently, gold (Au) silver (Ag) codoped molybdenum disulfide (MoS2) (Au–Ag–MoS2) proposed as NO NO2 gas sensor based on density functional theory (DFT) calculations....
Hydrogen sulfide and sulfur dioxide are highly hazardous gases, thus, the development of sensitive selective materials for their adsorption is desirable. The effect Cu doping MoSe2 on its both H2S SO2 gases investigated in this work using first principles density functional theory (DFT) computations. band gap, distance, energy, states, charge transfer examined details. results illustrate significant changes electronic properties as well due to with Cu. reveal states gap upon that enhance...
The development of gas sensors that are based on metal/metal-oxide nanoclusters has attracted intensive research interest in the last years. Nanoclusters suitable candidates for sensor applications because their large surface-to-volume ratio can be utilized selective and rapid detection various gaseous species with low-power consuming electronics. Herein, used as building blocks construction where electrical conductivity changes dramatically upon exposure to target gas. In this review,...
Metal oxide nanoparticles, such as CuO and SnO2, are outstanding systems for H2S gas sensing in air. In this work, those nanoparticles were deposited with different mixing percentages on substrates to form percolating networks of nanoparticles. Electrical electrodes the nanoparticles' films investigate their response against H2 H2S, electrical characteristics. The sensor devices based CuO–SnO2 revealed enhanced characteristics a sensitivity 10 ppm. could be attributed formation PN-junctions...
In this study, density functional theory (DFT) has been used to build armchair graphene nanoribbon (AGNR) gas sensor and study its capacity detect carbon monoxide (CO), dioxide (CO2), sulfur (SO2) gases. The adsorption of these gases on AGNR was confirmed based the energy (Eads), distance (D), charge transfer (ΔQ), states (DOS), band structure. order improve capacity, three different modified systems have built. first functionalized with epoxy (-O-) group (AGNR-O), then hydroxyl (-OH)...
In this article, a zigzag graphene nanoribbon (ZGNR)-based sensor was built utilizing the Atomistic ToolKit Virtual NanoLab (ATK-VNL), and used to detect nitric oxide (NO), nitrogen dioxide (NO2), ammonia (NH3). The successful adsorption of these gases on surface ZGNR investigated using energy (Eads), distance (D), charge transfer (∆Q), density states (DOS), band structure. Among three gases, showed highest for NO with −0.273 eV, smallest 2.88 Å, −0.104 e. Moreover, DOS results reflected...
The use of microwave-assisted synthesis (in water) α-Fe2O3 nanomaterials followed by their transformation onto iron oxide Fe3O4-γ-Fe2O3 hollow nanoparticles encoding well-defined sizes and shapes [nanorings (NRs) nanotubes (NTs)] is henceforth described. impact experimental variables such as concentration reactants, volume solvent employed, reaction times/temperatures during the shape-controlled revealed that key factor gated generation morphologically diverse was associated to initial...
We describe nanocluster based tunneling sensors for detecting hydrogen. Pd clusters with diameters ranging from 3.5to6nm are deposited between a pair of contacts until predetermined resistance the is obtained. demonstrate that conduction through cluster film dominated by gaps. Upon exposure to hydrogen, expand, reducing average size gaps and measured resistance. The sensor response as function external hydrogen pressure described, different sizes operating temperatures, simple model single...
We report on the fabrication of palladium (Pd) nanoclusters using a dc magnetron sputtering source. Plasma vaporizes target’s material forming by inert gas condensation. The source produces ionized that enable study nanoclusters’ size distribution quadrupole mass filter. In this work, dependence Pd various parameters, such as discharge power, flow rate, and aggregation length have been investigated. This work demonstrates ability tuning proper optimization operation conditions. experimental...