preparation and characterization of nanostructured tio2 thin films by

Tài liệu Báo cáo "Preparation and characterization of nanocomposite TiO2/SnO2 films " pdf

... spray pyrolysis for TiO2 and sol-gel for SnO2 As prepared films exhibit a nanocomposite structure, constituting of a majority of TiO2 and a small amount of SnO2 located on the TiO2 grain surfaces, ... evaporation of solvents and volatile products, took place simultaneously with the deposition process, caused the porosity of the TiO2 films Prepareation of TiO2/ SnO2: After the material characterization ... Research of Vietnam, Grant N 405606 References [1] N Castillo, D Olguin, A Conde- Gallardo, S Jiménez- Sandoval, Structural and morphological properties of TiO2 thin films prepared by spray pyrolysis,...

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Growth and characterization of nickel oxide thin films and nanostructures for novel device applications

Danh mục: Thạc sĩ - Cao học

... Fabrication of uniform NiO nanotubes by varying nanowire diameter 101 6.1.7 Summary 111 6.2 Characterization of Nanostructured RS Device 112 6.3 Characterization of Nanostructured ... accomplishments of this work and the thesis is concluded by suggesting a number of recommendations for future work Chapter Literature Review 2.1 Growth of NiO Thin Film 2.1.1 Physical deposition of NiO thin ... conical conductive filament within the TiO2 layer as Ti4O7, the magneli phase of TiO2 [54] The conductivity of TiO2- x increases with the increasing value of x [57-59], and when x reaches a certain...

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characterization of h - wo3 nanorods synthesized by hydrothermal process

Danh mục: Vật lý

... modes of crystalline h-WO3 The bands at 807 and 702 cmÀ1 are attributed to the symmetric and asymmetric vibrations of W6+–O bonds (O–W–O stretching modes), while the bands at 328, 265 and 236 ... nanostructures of h-WO3 Thus, the size and the yield of the rod-like nanostructures increase with increasing the amount of the salt As a result, the presence of an appropriate amount of Na2SO4 plays ... play important roles on the types of structure, morphology and size of particles constituting the product The details of the effect of sulfate on the formation of WO3 nanocrystal are not clear...

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preparation and characterization of cnts tio2 composites

Danh mục: Vật lý

... area of CNTs was also the basis for formation of the composites Though the density of TiO2 is larger than that of CNTs, the TiO2 – CNTs composites could form a homogeneous dispersion in ethanol and ... successfully by means of hydrolysis, and CNTs were partly coated with TiO2 There were some polar oxygenated groups such as C – O, C=O and O – C=O which might stimulate formation of the composites, and ... addition of TiO2 was supposed to increase the space among CNTs and improve the dispersion of CNTs in matrix In addition to that, due to the semiconducting properties of TiO2, the CNTs TiO2 composites...

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Báo cáo hóa học: " Direct Synthesis and Characterization of Optically Transparent Conformal Zinc Oxide Nanocrystalline Thin Films by Rapid Thermal Plasma CVD" pptx

Danh mục: Hóa học - Dầu khí

... measurements of 20-nm- and 200-nm-thick ZnO films show a high optical transmittance at spectra 375 nm and above, which corresponds to the optical bandgap of ZnO Thermal annealing of ZnO films at ... Loffler J, Sommeling PM, Lindend JL, Hamersa EAG, Schropp REI, van de Sandena MCM: Surface textured ZnO films for thin film solar cell applications by expanding thermal plasma CVD Thin Solid Films ... Morphologies of ZnO films deposited on ceramic and metal substrates The morphologies of ZnO films deposited on (a) p-type Si(100), (b) muscovite, (c) gold, and (d) titanium at a substrate temperature of...

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Báo cáo hóa học: " Facile Synthesis of Novel Nanostructured MnO2 Thin Films and Their Application in Supercapacitors" pptx

Danh mục: Hóa học - Dầu khí

... lm) of a-MnO2 can be obtained by the reaction between MnSO4 and (NH4)2S2O8 with the addition of AgNO3 catalyst at RT for 1–2 days The thin shell of this structure is composed of nanorods, and ... 1036 substrate in the thin film form The effects of the synthesis temperature on the morphology of the films are investigated, and the capacitive behaviors of nanostructured MnO2 thin films with different ... adsorption of cations in the electrolyte (M? = Li?, Na?, and K?) on the surface of MnO2 and also possible intercalation/deintercalation of H? and alkaline metal cations in the bulk of MnO2 [29]...

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DEFECT INDUCED NOVEL ELECTRICAL, MAGNETIC AND OPTICAL PROPERTIES OF TIO2 THIN FILMS GROWN BY PULSED LASER DEPOSITION

Danh mục: Ngữ pháp tiếng Anh

... electronic and magnetic properties of epitaxially grown transition metal doped TiO2 thin films by pulsed laser deposition technique on different metal oxide substrates Crystal Structure of TiO2 TiO2 ... purification and other environmental applications46 12 Chapter Growth and Characterization Technique 13 In this chapter, we will discuss the growth and characterization technique of thin films of Ti1-xTaxO2 ... the doping of metal or non-metal ions in the lattice of TiO2 is often accompanied by formation of oxygen vacancies Several groups have observed formation of oxygen vacancies in the TiO2 lattice...

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Microstructure and magnetic properties of cozr and co doped tio2 thin films

Danh mục: Tổng hợp

... MICROSTRUCTURE AND MAGNETIC PROPERTIES OF COZR AND CO-DOPED TIO2 THIN FILMS YAO XIAOFENG A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING ... target and bombarded the target surface with a relatively high energy The sputtering atoms fly off in random directions, and some of them land on the substrate, condense there, and form a thin ... The development of in-plane and out -of- plane hysteresis loops of 44 annealed CoZr films following the change of Co concentration Fig.3.3 Saturation magnetiztion (Ms) as a function of the Zr content...

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properties and sensor performance of zinc oxide thin films

Danh mục: Vật lý

... exp − Εg kT (2.19) where Nc and Nv are the density of state of conduction band and valence band, respectively, and Eg is the energy band gap of materials When electrons and holes are tightly bound ... plane and strains along the c-axis of ZnO films 66 4.3 XRD parameters and calculated strains of Al doped ZnO films 67 4.4 Average roughness (Ra, nm) of ZnO films on micro arrays by AFM ... QS and ND are surface charge and the number of ionized donor states per unit volume, and K, εO, and ∆φS denote the static dielectric constant of the oxide, the permittivity of the vacuum, and...

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Fabrication and characterization of luminescent silicon nanocrystal films

Danh mục: Tổng hợp

... roughness of the SiOx films as a function of the flow ratio R 88 Fig 4.7 IR spectra of the as-deposited SiOx films at different flow ratios of R 90 Fig 4.8 IR spectra of the SiOx films ... in XPS spectra of the SiOx nanostructured films deposited by PLD at different substrate temperatures (b) The atomic concentration of the SiOx nanostructured films as a function of the substrate ... as-deposited and (b) after thermal annealing in high vacuum for 60 at a temperature of 800 °C 135 Fig 5.6 Optical bandgaps and PL peak energies of the SiOx nanostructured films formed by PLD as...

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Fabrication and characterization of nanostructured half metals and diluted magnetic semiconductors

Danh mục: Tổng hợp

... Ge1xMnx thin films, thin films of coexistence of amorphous Ge1-xMnx, Ge crystallites, and high TC secondary phase, granular Ge0.74Mn0.26 thin film, and δ-doped amorphous Ge1xMnx thin films have ... objective and motivation of this work, followed by the outline of this thesis Chapter 2: Fabrication and characterization of Fe3O4 nanostructures Epitaxially-grown Fe3O4 thin films and nanowires ... illustration of the fabrication process of Fe3O4 36 nanowires FIG 2.6 FIB images of Fe3O4 nanoconstrictions with a width of (a) 150 36 nm and (b) 80 nm, and a length of µm FIG 2.7 XRD pattern of Fe3O4 thin...

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The effects of additional nonmagnetic layers on structure and magnetic properties of l10 fept thin films

Danh mục: Cao đẳng - Đại học

... curves of the FePt fct (001) peak of FePt thin films with and without Ag intermediate layers Figure 8-4 Plane view TEM images of FePt thin films with (a) Structure I and (b) Structure III and (c) ... fabrication and characterization of the FePt thin films in this thesis In order to study the magnetic and structural properties of FePt thin films, the first step in the experiment is to fabricate the films ... structure of FePt films and coercivity values for FePt thin films grown on corning glass and MgO substrates with different structures X List of figures Figure 1-1 Growth curve of areal density of magnetic...

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Deposition, microstructure and magnetic anisotropy of cobalt ferrite thin films

Danh mục: Cao đẳng - Đại học

... anisotropy and growth mechanism of thin films are reviewed, which provides the background to understand this work 1.2 Magnetic anisotropy and coercivity of thin films 1.2.1 Magnetic anisotropy of films ... Co-ferrite thin films, Bulletin of materials science, 29, 573 (2006) [8] J H Yin, J Ding, J S Chen, and X S Miao, Magnetic properties of Coferrite thin films prepared by PLD with in-situ heating and ... detachment of atoms from islands and diffusion of atoms on the substrate surface to attach to other islands, resulting in the shrinkage and even disappearance of some islands and the growth of other...

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Synthesis and characterization of nanostructured materials using dispersion polymerization

Danh mục: Cao đẳng - Đại học

... of theoretical and experimental tools and techniques, which increases our understanding of matter in both the micro and the nano regimes A typical example is the development of atomic force and ... polymerization); and (ⅲ) the macroscopic precipitation of the polymer is prevented by the presence of a suitable stabilizer The principles of steric stabilization and the use of various types and architectures ... followed by subsequent admixing of divinylbenzene and a radical initiator [146] Polymer layers of poly(vinylbenzyl chloride) (PVBC), copolymers of PDVB-PVBC, and double shells of PDVB and PVBC...

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Structure and properties of lead zirconate titanate thin films by pulsed laser deposition

Danh mục: Cao đẳng - Đại học

... Figure 4.2 Surface SEM images of the PZT thin films deposited by (a) PLD method and (b) sol-gel method; Cross-sectional SEM images of the PZT thin films grown by (c) PLD and (d) sol-gel 63 Figure ... Figure 4.3 P-E hysteresis loops of the PZT thin films grown by PLD and sol-gel 65 Figure 4.4 Dielectric constant and loss tangent of the PZT films grown by (a) PLD and (b) sol-gel 67 Figure 4.5 ... deposition method and PLD method, by having thin 26 Chapter Apparatus and experiment procedures films with different morphology and structure This would help us to have a better understanding of the underlying...

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Long range and short range orders, and phase miscibility of cocrpt ti thin films

Danh mục: Cao đẳng - Đại học

... materials, and the development of alloying and phase separation of CoCrPt films A: Limitation of the investigation of SRO and phase miscibility by conventional XRD Structural characterization of solid ... films fall within the domain of materials science A better basic understanding of magnetic thin films, such as the degree of alloying and phase separation of these films, may provide a future ... (0001), and Co (0001) viewed from Si and [111], and Co and Ti [0001] directions, every corner and center of the hexagonal lattice represent a given atom; (b) The designed structure of the thin films …...

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FIRST ORDER PHASE TRANSITION AND MAGNETIC PROPERTIES OF EPITAXIAL FERH THIN FILMS

Danh mục: Cao đẳng - Đại học

... Fe52Rh48 thin films of thicknesses 5nm, 10nm, 20nm, 50nm, 100nm and 200nm 41 Figure 4.4 Magnetic-Thermal hysteresis of Fe52Rh48 thin films of thickness 200nm, 100nm, 50nm, 20nm, 10nm and 5nm Films ... multiplied by a factor of √2 of (a) Fe50Rh50 and (b) Fe48Rh52 thin films of thicknesses 5nm, 10nm, 20nm, 50nm, 100nm and 200nm 50 ix Figure 4.9 Magnetic-Thermal hysteresis of (a) equiatomic Fe50Rh50 and ... 100nm, 50nm and 20nm 56 Figure 4.12 Magnetization, lattice parameter-c, and lattice parameter-a multiplied by factor of 2 , and volume of unit cell of Fe52Rh48, Fe50Rh50, and Fe48Rh52 thin films epitaxially...

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FIRST ORDER PHASE TRANSITION AND MAGNETIC PROPERTIES OF EPITAXIAL FERH THIN FILMS

Danh mục: Tổng hợp

... Fe52Rh48 thin films of thicknesses 5nm, 10nm, 20nm, 50nm, 100nm and 200nm 41 Figure 4.4 Magnetic-Thermal hysteresis of Fe52Rh48 thin films of thickness 200nm, 100nm, 50nm, 20nm, 10nm and 5nm Films ... multiplied by a factor of √2 of (a) Fe50Rh50 and (b) Fe48Rh52 thin films of thicknesses 5nm, 10nm, 20nm, 50nm, 100nm and 200nm 50 ix Figure 4.9 Magnetic-Thermal hysteresis of (a) equiatomic Fe50Rh50 and ... 100nm, 50nm and 20nm 56 Figure 4.12 Magnetization, lattice parameter-c, and lattice parameter-a multiplied by factor of 2 , and volume of unit cell of Fe52Rh48, Fe50Rh50, and Fe48Rh52 thin films epitaxially...

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STUDY ON LATTICE AND ELECTRONIC STRUCTURES AT THE SURFACE OF BATIO3 THIN FILMS BY DFT METHOD

Danh mục: Vật lý

... SURFACE OF 215 Table The location and DOS peak structure of energy bands of bulk material and under-investigation films in eV Bulk Band no.1 Peak 1a 1b Band no.2 Peak 2a 2b 2c 2d 2e 2f Band no.3 ... bands no.1 and no.2 are occupied Above Fermi level bands no.3 and no.4 are unoccupied Bands no.2 and no.3 are the highest occupied and lowest unoccupied bands which are well-known as valence and ... the band gap reducing, the downward broadening of both valence and conducting bands and two additional peaks at -2.7 and -0.4 eV (no.2d and 2f) which have the origin of STUDY ON LATTICE AND ELECTRONIC...

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Magnetic properties of co ta thin films and their applications in magnetic tunnel junctions

Danh mục: Tổng hợp

... of contents 4.6 4.7 Co-Ta Alloy 65 4.6.1: Calibration of Co and Ta 65 4.6.2: Coercivity of Co-Ta Films 66 4.6.3: TEM of Co-Ta Grains 68 4.6.4: MFM Images of Co-Ta Films 69 4.6.5: TEM Images of ... Summary 50 3.3 3.4 CHAPTER 4: CHARACTERIZATION OF THIN FILMS 51 4.1 Introduction 51 4.2 Seed Layer 53 4.2.1: Characterization of Ni80Fe20 53 4.2.2: Characterization of Ta 55 4.3 Bottom Electrode ... completion of this project The main issues concern the fabrication of films and devices as well as the characterization of these samples Fabrication of the samples involves many equipment and techniques...

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preparation and characterization of nanostructured tio2 thin films by hydrothermal and anodizati