first principle study of the metal support interactions and o2 dissociation on single atom pt wxc 100
Electronic, magnetic and optical properties of oxide surfaces, heterostructures and interfaces role of defects
... functions of electrons inside the QCB and the conduction band of NSTO can overlap and interact with each other The implications of this mechanism are far-reaching especially now the entire semiconductor ... of the band diagram of the device with no voltage bias The middle defect band represents the defect levels of LAO, which are widely distributed in the bandgap at ~2 eV below the conduction band ... by means of vacuum reduction or Argon-ion milling after the realization of atomically flat nanoscale film growth on LAO substrates In addition, we studied the origin of the 2DEG at the LAO/STO...
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Design, fabrication, and characterization of a solenoidsystem to generate magnetic field for an ECR proton source
... with a slope of 21·5 G/A The ampere-turns were determined to produce the maximum possible magnetic field on the axis The size and the power consumption of the solenoid coils were the limiting ... investigate the plasma parameters to optimize the beam current A conventional ECR ion source uses the principle of adiabatic invariance for mirror reflection, and high magnetic field mode of operation to ... iron jacket, and amp-turns (NI) The optimum values of NI for the side and middle solenoid coils were obtained to be 12950 and 8250 respectively Based on these parameters, the total length of the...
- 8
- 650
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fabrication and characterization of anodic titanium oxide nanotube arrays of controlled
... variation of length of TiO2 NT as a function of period of anodization (the corresponding SEM images of each datum showing the lengths of the tubes are given in the Supporting Information, Figures ... proportional to the fluoride concentration and to the duration of anodization We confirmed this correlation, but the tubes adhered more weakly to the substrate when the tubes grew longer To discover optimal ... shifts the conduction band potential of TiO2 toward negative and leads to the increase of VOC Furthermore, TBP suppressed the recombination between the injected electrons and triiodide anions that...
- 7
- 445
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Báo cáo hóa học: " Fabrication and characterization of carbon-based counter electrodes prepared by electrophoretic deposition for dye-sensitized solar cells" doc
... Association (KOITA) Authors’ contributions HK fabricated the cells and wrote the paper HK and HC did the characterization and imaging of the solar cells SH and YK helped design the experimental study ... illumination of 100 mW/cm2 under an open-circuit condition and in a frequency range of 0.1 Hz to 100 KHz Results and discussion Figure shows the FE-SEM images of deposited (a) graphenes, (b) SWNTs, and ... on the FTO substrates Deposited graphenes (a) were identified by their different contrasts, and they showed the presence of graphene wrinkles formed during the EPD deposition In the case of the...
- 4
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báo cáo hóa học:" Fabrication and characterization of carbon-based counter electrodes prepared by electrophoretic deposition for dye-sensitized solar cells" pot
... Association (KOITA) Authors’ contributions HK fabricated the cells and wrote the paper HK and HC did the characterization and imaging of the solar cells SH and YK helped design the experimental study ... illumination of 100 mW/cm2 under an open-circuit condition and in a frequency range of 0.1 Hz to 100 KHz Results and discussion Figure shows the FE-SEM images of deposited (a) graphenes, (b) SWNTs, and ... on the FTO substrates Deposited graphenes (a) were identified by their different contrasts, and they showed the presence of graphene wrinkles formed during the EPD deposition In the case of the...
- 4
- 361
- 0
báo cáo hóa học:" Fabrication and characterization of well-aligned and ultra-sharp silicon nanotip array" ppt
... contamination On the other hand, the current of the oxide-capped nanotip retains a sharp curve Furthermore, the turn -on field of the oxide-capped sample is slightly improved compared with the uncapped one ... Medvid A, Onufrijevs P, Alexan Mychko A: Properties of nanocones formed on a surface of semiconductors by laser radiation: quantum confinement effect of electrons, phonons, and excitons Nanoscale ... formation at different etching times The coated PR on top of the tips serves as the shielding mask to protect the underlying silicon (Figure 2a) The etching depth of silicon is increased upon etching...
- 15
- 259
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Design, fabrication and characterization of thin film materials for heterojunction silicon wafer solar cells
... photons due to their much higher absorption depth as compared to short-wavelength photons On the other hand, a significant amount of the front optical losses is contributed by the front TCO and the ... the voltage applied to the parallel plates, and accelerated towards the substrate Through the interaction of ion bombardment, adsorption, migration and dissociation of the species, a series of ... films, the optimisation of the deposition conditions is required to achieve films with low defect densities and the above-mentioned properties Chapter will provide details on the optimisation process...
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Large area plasmonic nanostructures design, fabrication and characterization by laser
... result of electron energy losses in thin films demonstrating the existence of plasmon mode near the surface of metal This study represents the first theoretical description of surface plasmons In ... the excitation wavelength of the laser and overlapping with an electronic absorption band of interest Finally, this thesis demonstrated the design and fabrication of a periodic array of Au nanorods ... gratings, and attributed it to the excitation of surface plasmon resonances on the gratings A major contribution to the study of surface plasmons was made in 1968 when Andreas Otto [16] and Erich...
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2D and 3d terahertz metamaterials design, fabrication and characterization
... is the outer dimension of the SRR unit cell, p the period of the SRRs metamaterials, w the line width of the SRR structure, and t the thickness of the SRR It should be noticed that the resonance ... current path of the SRR and capacitance LC is mainly determined by the gap size of the SRR and the dielectric properties of the surrounding environment [44] With the polarization of the electric ... relationship between the resonance frequency (fR) and the structural size ( ab ) is no longer held due to the saturation of the limited free electron kinetic energy [6] The strength of the resonance...
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Fabrication and characterization of advanced ALGaNGaN high electron mobility transistors
... function of Al content x of the AlxGa1 xN barrier layer [10] conduction band edge energy, and EC is the conduction band offset at the AlxGa1-xN/GaN interface Fig 1.4 plots the calculated ns of ... circuit of the metal- oxide-semiconductor structure, showing the oxide capacitance Cox, the capacitance of the depletion region Cd, the capacitance Cit and resistance Rit of the interface states, and ... electron velocity (3 × 107 cm/s) and saturation electron velocity (1.5 × 107 cm/s) [4] These GaN properties together with the combination of a large conduction band offset and a high electron mobility...
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Fabrication and characterization of germanium photodetectors
... processor, which is the foundation of next-generation central-processing-unit (CPU) 1.6 Thesis Organization The organization of the thesis is divided in the following chapters In Chapter 2, the recent ... to the bandwidth-efficiency tradeoff This tradeoff results from the opposite requirement of the thickness of the photoabsorption layer for high bandwidth and high efficiency [2.29] hu SiO2 Metal ... single mode fiber is shown together To obtain the intrinsic characteristics of the Ge JFET, the contribution of source-drain current of the un-illuminated part of the channel in ID calculation...
- 132
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Fabrication and characterization of composite membranes for gas separation
... to this theory, the gas first adsorb on the surface of the rubber depending on the inherent properties of the gas, then the gas “comes to evaporate” and reappears on the other side of the membrane ... Barrer=1X10-10cm3(STP)-cm/s-cm2-cmHg), the demonstration of temperature dependence of permeability and diffusivity follows the Arrhenius equation and the dual mode concept of sorption in glassy polymers These models later ... unwavering and unconditional love and support My parents and parents’ in-law also deserve the special recognition for their love and continuous encouragement and support Lanying Jiang ii TABLE OF CONTENTS...
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Fabrication and characterization of luminescent silicon nanocrystal films
... found and the Si4+ peak becomes stronger and shifts to 104.0 eV, which corresponds to SiO2 bonding [15] Figure 2.7 shows the depth profiles of the atomic concentration The points with high Si concentration ... formed in the films as a result of post-deposition thermal annealing in high vacuum and thermal oxidation The phase separation and Si NC formation in correlation with the optical properties of the ... postdeposition processing conditions on the structures and PL properties of Si NCs were studied Based on the post-deposition processing effects, the origins of the PL - 11 - Chapter 1: Introduction and...
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Fabrication and characterization of memory devices based on organic polymer materials
... [30] 17 Chapter 1: Introduction The easiest and more compact solution is the integration of one diode in series with the cell, at least for the resistive type of memories, and the use of intermediate ... Preparation and Characterization of the PKEu Copolymer 63 3.2.2 Device Fabrication and Characterization 64 3.3 Results and Discussions 65 3.4 Conclusion 77 Reference 78 CHAPTER Material Properties and ... enhance our understanding of the application of organic and polymer materials to the organic memory device and it may also contribute to further investigations on the material selection for organic...
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Fabrication and characterization of nanostructured half metals and diluted magnetic semiconductors
... Objectives and motivation In this study, we focused on the fabrication and characterization of two kinds of spintronic materials: Fe3O4 and Ge1-xMnx The former is a kind of half metal, while the latter ... lack of the ability in charge control limits their further application At the same time, the semiconductors used for devices and integrated circuits not contain the magnetic ions and are nonmagnetic ... required Among many of the possible candidates, the idea of using spin in electronics, i.e., spintronics, has attracted great attention [3,4] Spintronics involves the study of active control and manipulation...
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Fabrication and characterization of the ultrafiltration and nanofiltration membranes
... 1991] Afronso and Pinho [2000] reported the transport flux of MgSO4, MgCl2 and Na2SO4 across the NF membrane, the effect of the anion valence and the feed concentration on the salt rejections They ... weaker, while the lower rejection of MgSO4 than Na2SO4 corresponds to the increasing order of the cations charge density When the concentration in the feed is low and the concentration of the fixed ... the ion exclusion principle The lower rejection of MgCl2 than MgSO4 corresponds to the decreasing order of the anion charge density, i.e the anion repulsion forces become 20 Introduction Chapter-I...
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Fabrication and characterization of AIGaN gan HEMTs
... measurements of the TLM device and on the validity of assumptions made in the analysis For example, the resolutions of the dimensional measurements of the width and length of the contacts and their ... address the issues concerned in the formation of good ohmic contact on the source and drain regions, and the Schottky gate contact This is followed by the reporting of the successful fabrication of ... layer and the channel layer: ρ(z) = e[n(z) – p(z) + NA – ND] (2.7) where n(z) and p(z) are the densities of the electrons and holes, and NA and ND are the densities of the ionized donors and acceptors,...
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Fabrication and characterization of lateral spin valves
... of thesis 1.5 Organization of thesis References Chapter Literature Review 2.1 Introduction 2.2 Theory of lateral spin valves 2.2.1 Theory of spin injection, detection and accumulation 2.2.2 Theory ... interaction 42 Figure 4.1 SEM images of the two different kinds of lateral spin valve geometries fabricated and the dimensions of the electrodes The inset shows the overview of the devices and the ... field of the narrower electrode The magnetization states of the electrodes corresponding to the respective portions of the curve are shown in the red boxes The black (blue) curve corresponds to the...
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Fabrication and characterization of photonic crystals
... them is the scale of the lattice constant In the case of ordinary crystals, the lattice constant is on the order of angstroms On the other hand, it is on the order of wavelength of the relevant electromagnetic ... three-dimensional (3D) Photonic crystals can offer us one solution to the problem of optical control and manipulation If the dielectric constants of the materials in the crystals are different enough, and ... templating and to prove their stop bandgaps by optical characterization 19 1.3 Organization of the Thesis This thesis is structured as follows The first chapter serves as introduction of the basics, the...
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Fabrication and characterization of planar hall devices
... direction 1.3 Organization of Thesis The outline of the thesis is as follows In chapter 1, the background and the objectives of thesis will be stated The summary of theories for various MR effect and ... is added on to the GMR effect The GMR effect depends on the relative orientation of magnetization between neighboring layers, therefore information on the direction of magnetization of each layers ... electrons and Ar ions is spontaneously generated upon voltage application and the Ar gas glows purple from the electronic excitations Argon ions are accelerated onto the target material, and by...
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