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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"Ultrathin Films"”.
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Magnetization Dynamics in Ultrathin Films and Multilayers
… discusses the magnetization dynamics of ultrathin films and multilayers using broadband ferromagnetic resonance (FMR) techniques and micromagnetic simulations. Chapter one includes the theoretical background on magnetization dynamics, the explanation of FMR experiments with schematic …
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Nanomechanical Properties of Polymer-Grafted Nanoparticle Ultrathin Films
Polymer thin films have recently become one of the most emerging research areas due to their profuse applications in energy storage, flexible electronics, and photonics. The mechanical response of polymer thin films is crucial in defining a high-performance device encompassing the film’s …
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Investigation of electroactive ultrathin films by surface plasmon spectroscopy
… and high pressure technique to investigate ultrathin electroactive polymer films. Firstly, the electropolymerization of 2, 2a??-bithiophene was investigated by electrochemical surface plasmon spectroscopy. The anion doping and dedoping were monitored during the electropolymerization. A shift …
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Atomic resolution studies of oxide superlattices and ultrathin films
The ability to grow ultrathin films layer-by-layer with well-defined epitaxial relationships has allowed research groups worldwide to grow a range of artificial films and superlattices, first for semiconductors, and now with oxides. In the oxides thin film research community, there have been …
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Functional and complex topological applications of plasma polymerized ultrathin films
… focused on the fabrication of plasma polymerized ultrathin films and the elucidation of their unique properties with an emphasis on the solvent-less, dry polymerization process to introduce post-deposition functionality, robustness, and shape preservation. Two major classes of materials are the …
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Ultrathin films on semiconductor substrates : growth, magneto-optical characteristics and spin injection
Ferromagnetic metal films on semiconductors are considered to be one of the mostlikely candidates to achieve an efficient spin injection at room temperature, which isone of the essential requirements for spintronics devices.The work presented focused on a study of the ferromagnetic …
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Surface morphology and ordering in side-chain liquid crystal diblock and homopolymer ultrathin films
… have been examined as substrate-supported thin films. The film thicknesses ranged from 0.5 to 10 times the block copolymer period (L). These novel materials are of interest because they exhibit self-oriented electro-optical properties in the bulk state, and may exhibit interesting field …
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Mechanical response of polyether polyurethane foams under multiaxial stress and the initial yielding of ultrathin films
… of this thesis, we study the initial yielding of ultrathin metallic films (thickness of a fraction of a micrometer). Recent experiments indicate that in free-standing metallic films of constant grain size the initial yield stress increases as the film becomes thinner, it peaks for a thickness on …
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Ferromagnetism of novel ultrathin films and multilayers: A study of Ru/C(0001) and Fe/Mn/Fe/Pd(100) using magneto-optic Kerr effect and spin-sensitive electron spectroscopies
… the spin-polarization and domain pattern in ultrathin films and multilayers, we develop a novel technique: scanning ion microscopy with polarization analysis (SIMPA). A highly focused Ga$\sp+$-ion beam from a liquid metal ion source is moved over a sample to locally eject secondary electrons, …
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Growth and magnetoelastic behavior of b-axis-oriented dysprosium
… is ideally suited for investigation with thin films, in which single crystal films of high quality can be prepared on substrates which cause their lattice parameters to differ from bulk values (strain) and which constrain the strictions which may occur (clamping). The present research describes …
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Admicellar Polymerization Of Calcium Carbonate And Its Performance In Drilling Fluids
… layer. However, no observation of polystyrene ultrathin films was observed using Fourier Transform Infra-red (FTIR) or Tapping mode Atomic Force Microscopy (AFM). Nevertheless, application testing of low-polymer content admicellar polymerized CaCO 3 in drilling fluids shoincrease in mud …
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Superconducting tunneling spectroscopy of low-dimensional materials
… of the first magnetoresistive measurements of ultrathin films of bismuth and bismuth-antimony are also presented, and it is shown that there are transport signatures consistent with the quantum size effect.
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Controlling the assembly of proteins and cells on SiO₂ surfaces
… This thesis centers on the development of ultrathin films of PEG on SiO₂ surfaces that 1) can resist the nonspecific adsorption of proteins and cells ("bioinert surfaces ") and 2) can provide surface sites for the specific immobilization of biomolecules ("bioactive surfaces "). Effective …
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ELECTRODEPOSITION OF POLYMER NETWORKS (EPON) AS CONFORMAL ULTRATHIN COATINGS
… and fail to uniformly apply functional thin films on their large and complex interior 3D surface. In this thesis, electrodeposition of polymer network (EPoN) is introduced to address the challenge for obtaining conformal polymeric thin films. The dual-functional molecular design possesses …
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Characterization of Spin Coated Polymers in Nano-environments as a Function of Film Thickness
… surface and the air interface, the thinner films required for such applications have distinctly different properties than those of the well-defined bulk systems. The goal of the current research is to elucidate the behavior of ultrathin films. Two separate studies were performed on thin …
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Reactivity of Oxide Surfaces and Metal-Oxide Interfaces: Effects of Water Vapor Pressure on Ultrathin Aluminum Oxide Films, and Studies of Platinum Growth Modes on Ultrathin Oxide Films and Their Effects on Adhesion
… the effects of water vapor exposure of ultrathin aluminum oxide films under non-ultrahigh vacuum conditions (>10-9 Torr) and (2) characterization of Pt growth modes on ultrathin Ta silicate and silicon dioxide films and the effects of growth modes on adhesion of a Cu overlayer. These …
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INVESTIGATION OF THE STRUCTURAL PROPERTIES OF HAFNIUM ZIRCONIUM OXIDE THIN FILMS
… ferroelectricity in HfxZr1-xO2 is retained in ultrathin films of only a few nanometers thickness. The ultrathin nature of these structures enables ferroelectric tunnel junctions with higher readout currents than FeRAM, and with non-destructive read-out. Both of these properties are in favour of …
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Single-crystal metal oxides and supported metal nanoclusters as model catalyst sytems
… behavior of phenol on rutile TiO2(110) and ultrathin films of alumina prepared on a NiAl(110) substrate. Electron paramagnetic resonance studies show that exposure of both γ-alumina and titania powder to phenol at 250°C results in the formation of persistent phenoxyl radicals. EELS studies …
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Microscopic Study of Structure, Chemical Composition and Local Conductivity of La2/3Sr1/3MnO3 Films
… spintronic applications. On the other hand, LSMO ultrathin films exhibit a metal-insulator transition (MIT) when reducing film thickness. The origin of such a thickness-dependent MIT remains highly controversial, though understanding and controlling this kind of behavior is necessary for any …
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