Browsing by Author "Ayesh, Ahmad I."
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Adsorption and gas sensing properties of CuFe2O4 nanoparticles
Abu Haija, Mohammad; Basina, Georgia; Banat, Fawzi; Ayesh, Ahmad I. ( Sciendo , 2019 , Article)Spinel ferrite nanoparticles in the form CuFe2O4 were tested for gas sensing applications. Nanoparticles pressed in a disk form were used to construct conductometric gas sensors. The disk was placed between two electrical ... -
Assessment of SnO2 nanoparticles' impact on the growth of Picochlorum maculatum algae
Bounnit, Touria; Ayesh, Ahmad I.; Saadaoui, Imen; Mohideen, Rihab S.; Sayadi, Sami ( Royal Society of Chemistry , 2022 , Article)To determine the effect of SnO2 nanoparticles on Picochlorum maculatum - isolated from a Qatar marine environment, algal growth media are amended with different nanoparticle concentrations (1, 5, 25, 50, and 100 mg L−1) ... -
Characterization of H2S gas sensor based on CuFe2O4nanoparticles
Haija, Mohammad Abu; Abu-Hani, Ayah F.S.; Hamdan, Najwa; Stephen, Samuel; Ayesh, Ahmad I. ( Elsevier Ltd , 2017 , Article)Copper ferrite (CuFe2O4) nanoparticles were prepared by the sol-gel auto-combustion method and used to construct a conductometric gas sensor in this work. The as-prepared CuFe2O4 nanoparticles were annealed at 500 °C and ... -
CO, CO2, and SO2 detection based on functionalized graphene nanoribbons: First principles study
Ehab, Salih; Ayesh, Ahmad I. ( Elsevier , 2020 , Article)In this study, density functional theory (DFT) has been used to build armchair graphene nanoribbon (AGNR) gas sensor and study its capacity to detect carbon monoxide (CO), carbon dioxide (CO2), and sulfur dioxide (SO2) ... -
Design, fabrication, and characterization of low-power gas sensors based on organic-inorganic nano-composite
Abu-Hani, Ayah F.S.; Awwad, Falah; Greish, Yaser E.; Ayesh, Ahmad I.; Mahmoudd, Saleh T. ( Elsevier B.V. , 2017 , Article)Low-power and selective H2S gas sensors based on tungsten oxide (WO3) nanoparticles (NPs) embedded in organic polymer membranes are presented in this study. WO3 NPs were synthesized using the sol-gel method. Polymer solutions ... -
Detection of DNA Bases via Field Effect Transistor of Graphene Nanoribbon with a Nanopore: Semi-empirical Modeling
Wasfi, Asma; Awwad, Falah; Ayesh, Ahmad I. ( Institute of Electrical and Electronics Engineers , 2021 , Article)DNA sequencing techniques are critical in order to investigate genes’ functions. Obtaining fast, accurate, and affordable DNA bases detection makes it possible to acquire personalized medicine. In this article, a ... -
DFT investigation of H2S adsorption on graphenenanosheets and nanoribbons: Comparative study
Ehab, Salih; Ayesh, Ahmad I. ( Elsevier , 2020 , Article)Graphenenanosheet (GNS), armchair graphenenanoribbon (AGNR), and zigzag graphenenanoribbon (ZGNR) systems were investigated by first principle calculations using the density functional theory (DFT). The DFT calculations ... -
DNA sequencing via Z-shaped graphene nano ribbon field effect transistor decorated with nanoparticles using first-principle transport simulations
Wasfi, Asma; Awwad, Falah; Awwad, Falah; Ayesh, Ahmad I. ( IOP Publishing , 2020 , Article)© 2020 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft. DNA detection has revolutionized medical and biological research fields. It provides a ... -
The effect of doping MoSe2 by clusters of noble metals on its adsorption for NH3
Ayesh, Ahmad I. ( Elsevier , 2022 , Article)The development of industrial activities is associated with negative impacts on the quality of the environment including emission of hazardous gases. Therefore, it is critical to produce sensitive and selective gas detectors ... -
Effect of Zn and Ni substitution on structural, morphological and magnetic properties of tin oxide nanoparticles
Bhuvana, S.; Ramalingam, H.B.; Vadivel, K.; Kumar, E. Ranjith; Ayesh, Ahmad I. ( Elsevier , 2016 , Article)Structural, morphological, optical and magnetic properties of Zn and Zn–Ni co-doped tin oxide (SnO2) nanoparticles synthesized by sol-gel method. The influence of doping concentration on phase and particle size of the ... -
Electronic signature of DNA bases via Z-shaped graphene nanoribbon with a nanopore
Wasfi, Asma; Awwad, Falah; Ayesh, Ahmad I. ( Elsevier Ltd , 2019 , Article)DNA sequencing witnessed significant research efforts to improve its efficiency and to reduce the production cost. Successful DNA sequencing of quick and low cost techniques associate with the personalized medicine as well ... -
Engineering the band gap of BN and BC2N nanotubes based on T-graphene sheets using a transverse electric field: Density functional theory study
Roya, Majidi; Ayesh, Ahmad I. ( Elsevier , 2022 , Article)A new class of nanotubes formed by rolling boron nitride (BN) and boron carbonitride (BC2N) sheets in the form of T-graphene is suggested in this work. The structural and electronic properties of these nanotubes, named ... -
Enhancing the Sensing Performance of Zigzag Graphene Nanoribbon to Detect NO, NO, and NH Gases.
Salih, Ehab; Ayesh, Ahmad I ( MDPI , 2020 , Article)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 (NO), and ammonia (NH). The ... -
Fabrication and characterization of flexible ruthenium oxide-loaded polyaniline/poly(vinyl alcohol) nanofibers
Chamakh, M.; Chamakh, Mariem; Ayesh, Ahmad I.; Gharaibeh, Mohammad F. ( Wiley , 2020 , Article)© 2020 Wiley Periodicals, Inc. Polyaniline/poly(vinyl alcohol)/ruthenium oxide (RuO2) composite nanofibers were produced by electrospinning technique. Hydrous ruthenium chloride was used as a precursor at different ... -
Fabrication and characterization of poly(vinyl alcohol)-Glycerol-Spinel ferrites flexible membranes
Shaheen, Adel; Haija, Mohammad A.; Chamakh, Mariem; Assayed, Ghada A. I.; Banat, Fawzi; Ayesh, Ahmad I.... more authors ... less authors ( John Wiley and Sons Inc. , 2019 , Article)Polymer membranes of ferrites nanoparticles, glycerol, and poly(vinyl alcohol) (PVA) were fabricated using a solution casting method. Spinel ferrites nanoparticles, CuFe2O4 or ZnFe2O4, and glycerol were used as dopants to ... -
Fabrication of H2S gas sensors using ZnxCu1-xFe2O4 nanoparticles
Haija, Mohammad Abu; Chamakh, Mariem; Othman, Israa; Banat, Fawzi; Ayesh, Ahmad I. ( Springer , 2020 , Article)Spinel ferrite nanoparticles can be easily retrieved and utilized for multiple cycles due to their magnetic properties. In this work, nanoparticles of a ZnxCu1-xFe2O4 composition were synthesized by employing a sol–gel ... -
Fabrication of H2S sensitive gas sensors formed of SnO2–Fe2O3 composite nanoparticles
Belal, Salah; Ayesh, Ahmad I. ( Elsevier B.V. , 2021 , Article)Nanocomposites of metal oxide are considered promising candidates for developing novel gas sensors of exceptional performance. Composite SnO2–Fe2O3 nanoparticles are produced in this work by a modified sole-gel method, and ... -
Fabrication of Selective Sensors for Hg2+ Traces in Water Using Graphene Decorated with Metal Nanoclusters
Ayesh, Ahmad I.; Karam, Zainab; Awwad, Falah; Meetani, Mohammed A. ( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)Mercury metal is released into water by different sources including sewage industrial waste, thus, it can enter human food chain. It is considered one of the most harmful pollutant of heavy metals since it is non-biodegradable, ... -
First principle investigation of H2Se, H2Te and PH3 sensing based on graphene oxide
Ehab, Salih; Ayesh, Ahmad I. ( Elsevier , 2020 , Article)Detecting toxic gases is of great importance to protect our health and preserve the quality of life. In this work, graphene (G) and graphene oxide with three different modifications (G–O, G–OH, and G–O–OH) have been used ... -
Investigation of phase transformation for ferrite-austenite structure in stainless steel thin films
Merakeb, Noureddine; Messai, Amel; Ayesh, Ahmad I. ( Elsevier B.V. , 2016 , Article)In this work we report on phase transformation of 304 stainless steel thin films due to heat treatment. Ex-situ annealing was applied for evaporated 304 stainless steel thin films inside an ultra-high vacuum chamber with ...