The Experts below are selected from a list of 1689 Experts worldwide ranked by ideXlab platform
B K Cho - One of the best experts on this subject based on the ideXlab platform.
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the role of Doping effect on the response of sno2 based thin film gas sensors analysis based on the results obtained for co doped sno2 films deposited by spray pyrolysis
Sensors and Actuators B-chemical, 2013Co-Authors: G Korotcenkov, I Boris, V Brinzari, S H Han, B K ChoAbstract:Abstract Effect of Doping by cobalt on gas sensing, electrophysical and structural properties of the SnO2 films was studied. Undoped and doped SnO2 films were deposited by spray pyrolysis method on alumina, silicon and quartz substrates kept at 410–450 °C. The film structure was controlled by XRD and SEM methods. Ozone and hydrogen were used as tested gases. It was found that the influence of Doping by cobalt on the SnO2-based gas sensor parameters depends on the concentration of Doping Additives and could be accompanied by either improvement of sensor parameters at low level of Doping (CCo
G Korotcenkov - One of the best experts on this subject based on the ideXlab platform.
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the role of Doping effect on the response of sno2 based thin film gas sensors analysis based on the results obtained for co doped sno2 films deposited by spray pyrolysis
Sensors and Actuators B-chemical, 2013Co-Authors: G Korotcenkov, I Boris, V Brinzari, S H Han, B K ChoAbstract:Abstract Effect of Doping by cobalt on gas sensing, electrophysical and structural properties of the SnO2 films was studied. Undoped and doped SnO2 films were deposited by spray pyrolysis method on alumina, silicon and quartz substrates kept at 410–450 °C. The film structure was controlled by XRD and SEM methods. Ozone and hydrogen were used as tested gases. It was found that the influence of Doping by cobalt on the SnO2-based gas sensor parameters depends on the concentration of Doping Additives and could be accompanied by either improvement of sensor parameters at low level of Doping (CCo
Muz İskender - One of the best experts on this subject based on the ideXlab platform.
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A comprehensive study on electronic structure and optical properties of carbon nanotubes with doped B, Al, Ga, Si, Ge, N, P and As and different diameters
'Elsevier BV', 2019Co-Authors: Muz İskenderAbstract:Density functional theory (DFT) is used for investigating the electronic structure and optical properties carbon nanotubes (CNTs) with doped B, Al, Ga, Si, Ge, N, P and As and different diameters. Our results show that the stability of CNTs increased when it comes to an increase in diameter, however, stability decreases depending on Doping Additives to pure CNTs. B-doped CNTs are the most effective for electronic conductivity due to its lower band gap. The non-linear optical (NLO) properties are discussed according to dipole moment, polarizability, and hyperpolarizability. All the doped CNTs exhibit a good NLO activity. B-, Al-, Ga- and N-doped CNTs have a significant effect on NLO properties. The band gap of CNTs considerably decreased from 2.76 eV to 1.40 eV and 1.78 eV–0.83 eV based on the diameter. The reactivity properties investigated based on chemical hardness, softness, and potential, electronegativity, electrophilicity, the maximum amount of electronic charge index, the electron accepting and donating capability as well as electronic density of states are also presented and analyzed. Herein, the results indicated that the characteristic properties of CNTs can be controlled with different atoms doped CNTs and diameters
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A comprehensive study on electronic structure and optical properties of carbon nanotubes with doped B, Al, Ga, Si, Ge, N, P and As and different diameters
'Elsevier BV', 2019Co-Authors: Muz İskender, Kurban MustafaAbstract:WOS: 000474567000005Density functional theory (DFT) is used for investigating the electronic structure and optical properties carbon nanotubes (CNTs) with doped B, Al, Ga, Si, Ge, N, P and As and different diameters. Our results show that the stability of CNTs increased when it comes to an increase in diameter, however, stability decreases depending on Doping Additives to pure CNTs. B-doped CNTs are the most effective for electronic conductivity due to its lower band gap. The non-linear optical (NLO) properties are discussed according to dipole moment, polarizability, and hyperpolarizability. All the doped CNTs exhibit a good NLO activity. B-, Al-, Ga- and N-doped CNTs have a significant effect on NLO properties. The band gap of CNTs considerably decreased from 2.76 eV to 1.40 eV and 1.78 eV-0.83 eV based on the diameter. The reactivity properties investigated based on chemical hardness, softness, and potential, electronegativity, electrophilicity, the maximum amount of electronic charge index, the electron accepting and donating capability as well as electronic density of states are also presented and analyzed. Herein, the results indicated that the characteristic properties of CNTs can be controlled with different atoms doped CNTs and diameters. (C) 2019 Elsevier B.V. All rights reserved
Deyi Zhang - One of the best experts on this subject based on the ideXlab platform.
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supercooling suppression and thermal behavior improvement of erythritol as phase change material for thermal energy storage
Solar Energy Materials and Solar Cells, 2017Co-Authors: Yi Wang, Ting Zhang, Deyi ZhangAbstract:Abstract The main aim of this paper is to mitigate the supercooling and improve the heat release performance of erythritol (ET) as phase change material for thermal energy storage using the method of encapsulation and Doping Additives. The capsules containing ET, thickening and nucleating agent were prepared and various characterization techniques were employed to investigate the structure and thermo-physical properties of the composite, especially the supercooling inhibition and exothermicity improvement. Experimental results reveal that capsulation and adding thickening and nucleating agents have positive influence on the supercooling elimination, heat discharging ability improvement and thermal stability enhancement. The optimal capsules, with the maximal ET mass percentage of 59.2%, melt at 121.2 °C and freeze at 106.4 °C with the latent heat of 213.3 J/g and 206.9 J/g, respectively. Due to the improved crystallization kinetics, the degree of supercooling decreased by 83.6% as well as the heat release ratio increased by 52.2% compared to those of pristine ET. The as-prepared capsules have obvious core-shell structure, good compatibility between the shell and core materials. The thermal conductivity is 0.84 W/m K, increased by 29.2% than that of pristine ET. The results of accelerated thermal cycling test indicate that the supercooling, heat release ability and thermal reliability of encapsulated ET changed imperceptibly. In total, the technology of capsulation and adding thickening and nucleating agents can be used to suppress the supercooling and improve the thermal behavior of ET.
I Boris - One of the best experts on this subject based on the ideXlab platform.
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the role of Doping effect on the response of sno2 based thin film gas sensors analysis based on the results obtained for co doped sno2 films deposited by spray pyrolysis
Sensors and Actuators B-chemical, 2013Co-Authors: G Korotcenkov, I Boris, V Brinzari, S H Han, B K ChoAbstract:Abstract Effect of Doping by cobalt on gas sensing, electrophysical and structural properties of the SnO2 films was studied. Undoped and doped SnO2 films were deposited by spray pyrolysis method on alumina, silicon and quartz substrates kept at 410–450 °C. The film structure was controlled by XRD and SEM methods. Ozone and hydrogen were used as tested gases. It was found that the influence of Doping by cobalt on the SnO2-based gas sensor parameters depends on the concentration of Doping Additives and could be accompanied by either improvement of sensor parameters at low level of Doping (CCo