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Adsorption and desorption of acetone by TiO_(2) clusters:Transition state theory and sensing analysis

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ChemPhysmater 2023年第4期2卷 351-355页

作者： mudar Ahmed Abdulsattar Tasneem Hassan mahmood Hussein Hakim Abed Hayder m.Abduljalil Department of Pharmacy Al-Rasheed University CollegeBaghdad 10011Iraq ministry of Science and Technology Baghdad 10011Iraq Department of Physics College of Science for WomenUniversity of BaghdadBaghdad 10011Iraq Department of Physics College of ScienceUniversity of BabylonBabylon 51005Iraq

TiO_(2) cluster sensitivity to acetone adsorption using transition state theory is ***_(10)O_(20) cluster is used to perform the calculations using density functional theory with dispersion *** state and transition state are calculated via thermodynamic energies,i.e.,Gibbs free energy of adsorption and *** rate,response,response time,and recovery time as a function of temperature and acetone concentration are *** burning in the air due to autoignition is considered using a logistic *** results of the theory are compared with available experimental findings that revealed the quality of both theoretical and experimental *** response time decreases with respect to acetone *** the other hand,the recovery time in the desorption phase increases with acetone *** temperature of maximum response is 356℃,while the maximum response value is 2.9.

关键词： TiO_(2) Acetone Transition state Sensor Density functional theory

Electron states and electron Raman scattering in semiconductor double cylindrical quantum well wire

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Chinese Physics B 2016年第11期25卷 453-460页

作者： m munguía-Rodríguez Ri Betancourt-Riera Re Betancourt-Riera R Riera J m Nieto Jalil Departamento de Investigación en Física Universidad de Sonora Apartado Postal 5-88 83190 Hermosillo Sonora México Instituto Tecnológico de Hermosillo. Avenida Tecnologico S/N Col. Sahuaro 83170 Hermosillo Sonora México Tecnológico de monterrey-Campus Sonora Norte. Bulevar Enrique mazón Lopez No. 965 83000 Hermosillo Sonora México

The differential cross section for an electron Raman scattering process in a semiconductor GaAs/AlGaAs double quantum well wire is calculated,and expressions for the electronic states are *** system is modeled by considering T = 0 K and also with a single parabolic conduction band,which is split into a subband system due to the *** gain and differential cross-section for an electron Raman scattering process are *** addition,the emission spectra for several scattering configurations are discussed,and interpretations of the singularities found in the spectra are *** electron Raman scattering studied here can be used to provide direct information about the efficiency of the lasers.

关键词： Electron cylindrical confinement conduction radius decoupling AlGaAs parabolic modeled resonant

Reliable Field Distortion Spark Gap for Plasma Focus

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Plasma Science and Technology 2007年第4期9卷 504-507页

作者： S.HUSSAIN m.ZAKAULLAH Department of Physics University of Sargodha40100 SargodhaPakistan Department of Physics Quaid-i-Azam University45320 IslamabadPakistan

A simple, low cost, easily maintained, and reliable field distortion spark gap has been developed to operate at a voltage up to 30 kV. The header construction necessary to attach the spark gap switch to a single 12.5 μF, 40 kV （10 k J） capacitor is described. The main features of the spark gap are its wide range of voltage operation, high current capacity, low inductance and long lifetime. The performance of spark gap has been tested in a plasma focus and results are presented in this report.

关键词： field distortion spark gap plasma focus

Synergetic deformation mechanisms in an mg-Zn-Y-Zr alloy with intragranular LPSO structures

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Journal of magnesium and Alloys 2023年第5期11卷 1754-1768页

作者： Z.Z.Peng X.H.Shao Z.m.Liang D.L.Wang L.W.Wang X.L.ma Hebei Key Laboratory of material Near-Net Forming Technology School of Materials Science and EngineeringHebei University of Science and TechnologyShijiazhuang 050018China Shenyang National Laboratory for materials Science Institute of Metal ResearchChinese Academy of Sciences72 Whenua RoadShenyang 110016China

Deformation kink is one of the important strengthening mechanisms of the long-period-stacking-ordered(LPSO)phase containing magnesium(mg)alloys,while the deformation twin is generally *** optimize the mechanical properties of LPSO containing mg alloy by simultaneously exciting kink and twin,we successfully prepared the mg-Zn-Y-Zr alloy featuring intragranular LPSO phase and free grain boundary LPSO phase by *** unraveled the corresponding strengthening and toughening mechanisms through transmission electron microscopy characterization and theoretical *** high strength and good plasticity of the homogenized alloy benefit from the synergistic deformation mechanism of multiple kinking and twining in the *** the activation of kinking and twinning depends on the thicknesses of LPSO lamellae and their relative *** results may shed light on optimizing the design of mg alloys regulating the microstructure of LPSO phases.

关键词： mg alloy LPSO distribution Kink Twin Transmission electron microscopy

morphological, Optical and DC Conduction Properties of a-GaSe Semiconductor Nanoparticle Thin Films

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Journal of materials Science & Technology 2013年第12期29卷 1151-1155页

作者： Sushil Kumar m.A. majeed Khan materials Science Lab. Department of Physics Chaudhary Devi Lal University Sirsa 125 055 India King Abdullah Institute for Nanotechnology King Saud University Riyadh 11451 Saudi Arabia

Amorphous gallium selenide （a-GaSe） semiconductor nanoparticle thin films were deposited onto well cleaned glass substrates by inert gas condensation （IGC） technique under a vacuum of 400 x 10-6 Pa （3 x 10-6 Torr）. The films were characterized by different structural and optical techniques, including X-ray diffraction, field emission scanning electron microscopy （FESEm）, field emission transmission electron microscopy （FETEm）, UV-visible absorption spectroscopy and I-V measurements. The particle size and size distribution were determined by TEm images which show the presence of spherical particles in the range of 5-50 nm in size. SEm images indicate that the a-GaSe film grown on glass substrate is almost smooth and dense. The optical properties of a-GaSe nanoparticle thin films were determined by optical absorption spectra. The optical bandgap of the film was estimated to be 2.19 eV and the transitions are allowed direct type. The electrical conductivity of the deposited films has been studied as a function of temperature. In the higher temperature range the dominance of thermally activated band conduction was observed; whereas in the low temperature ranqe the hoppinQ conduction in the band tails of localized states was found to be dominated.

关键词： Nanoparticles Thin film Optical bandgap Electrical conductivity

A barrier to metal movement: Synchrotron study of iron plaque on roots of wetland plants

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Journal of Environmental Sciences 2016年第6期28卷 1-3页

作者： Iris Koch michelle m.Nearing Royal military College of Canada

A wetland with attractive plants hosting birds and other wildlife is an esthetically pleasing prospect that is gaining popularity as a way of stabilizing or remediating metalcontaminated soils and sediment（Weber and ... 详细信息

关键词： Wetland plants metal contamination Urban brownfield sites X-ray microtomography and microfluorescence Copper Iron Lead Zinc

An Improvement of the Asymptotic Iteration method for Exactly Solvable Eigenvalue Problems

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Chinese Physics Letters 2007年第11期24卷 3028-3031页

作者： I. Boztosun m. Karakoc Faculty of Arts and Sciences Department of Physics Erciyes University Kayseri Turkey

We derive a formula that simplifies the original asymptotic iteration method formulation to find the energy eigenvalues for the analytically solvable cases. We then show that there is a connection between the asymptotic iteration and the Nikiforo-Uvarov methods, which both solve the second order linear ordinary differential equations analytically.

关键词： coated conductor buffer layer self-epitaxy CeO2

Shearfree Spherically Symmetric Fluid models

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Chinese Physics Letters 2012年第5期29卷 41-44页

作者： m.Sharif Z.Yousaf Department of mathematics University of the PunjabQuaid-e-Azam CampusLahore-54590Pakistan

We attempt to discover some exact analytical models of the spherically symmetric spacetime of collapsing fluid under shearfree *** types of solution are considered:one is to impose a condition on the mass function,while the other is to restrict the *** obtain five exact models in total,and some of them satisfy the Darmoie conditions.

关键词： conditions. exact satisfy

Ideal-Based k-Zero-Divisor Hypergraph of Commutative Rings

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Algebra Colloquium 2021年第4期28卷 655-672页

作者： K.Selvakumar m.Subajini Department of mathematics Manonmaniam Sundaranar University Tirunelveli 627012Tamil NaduIndia

Let R be a commutative ring,I an ideal of R and k≥2 a fixed *** ideal-based k-zero-divisor hypergraph HkI(R)of R has vertex set ZI(R,k),the set of all ideal-based k-zero-divisors of R,and for distinct elements x1,x2,…,xk in ZI(R,k),the set{x1,x2,…,xk}is an edge in HkI(R)if and only if x1x2…xk∈I and the product of the elements of any(k-1)-subset of{x1,x2,…,xk}is not in *** this paper,we show that H3I(R)is connected with diameter at most 4 provided that x^(2)(∈)I for all ideal-based 3-zero-divisor ***,we find the chromatic number of H3(R)when R is a product of finite ***,we find some necessary conditions for a finite ring R and a nonzero ideal I of R to have H3I(R)planar.

关键词： hypergraph zero-divisor graph linear local ring k-prime ideal