Global ETD Search
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 24 for “"multilayer thin films"”.
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Synthesis and Characterization of Metallic-Magnetic Multilayer Thin Films
No abstract prepared.
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Functionalized multilayer thin films for protection against acutely toxic agents
… solutions onto a substrate in order to construct thin films via the Layer-by-Layer (LbL) technique has been further investigated and extended. In this process a fully automated system capable of depositing thin polymer films from atomized mists of solutions containing species of complementary …
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Controlled and explosive silicidation of metal/amorphous-silicon multilayer thin films
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1989.
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Polyelectrolyte multilayer thin films with antimicrobial, antifouling and drug releasing properties
This thesis work focuses on designing thin polyelectrolyte multilayer (PEM) films via layer-bylayer (LbL) deposition technique with the ability to kill pathogenic bacteria and inactivate human viruses, especially the influenza (flu) virus on contact. This work builds on four years of research at …
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Light emitting characteristics and dielectric properties of polyelectrolyte multilayer thin films
… a new sequential adsorption technique to deposit thin polyelectrolyte multilayer films. This involves alternately dipping a substrate into dilute aqueous solutions of a positively charged polyelectrolyte followed by a negatively charged polyelectrolyte, with a rinsing step in between. By repeating …
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Investigation of Pd-Ti and Ni-Ti Multilayer Thin Films for Enhanced Hydrogen Storage Capacity
… interstitial sites. This study examined the multilayers of Pd-Ti and Ni-Ti, which were synthesised and evaluated for hydrogen storage and the kinetics of absorption and desorption. The Pd/Ti/Pd/Ti and Ni/Ti/Ni/Ti multilayers were fabricated using an e-beam evaporator and annealed at different …
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The c33 elastic constant of MoS2 as a function of pressure and the deposition of multilayer thin films by sputtering
… sputtering chamber for deposition of [Co,Pt] multilayer transducers for use in time-resolved magneto-optical Kerr effect (TR-MOKE) experiments is also discussed, along with the preliminary film and transducer characterization. Four-point probe measurements of the thin films indicated high …
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Study of the effect of mechanical stiffness substrata, assembled with polyelectrolyte multilayer thin films, on biofilm forming staphylococcus epidermidis' initial adhesion mechanism
Polyelectrolyte multilayer thin films are polymer films assembled through a layer-by-layer sequential addition of oppositely charged polymers. The layer-by-layer film assembly technique allows for properties such as film thickness, chemical functionality, and elastic moduli to be easily altered by …
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Indentation Behavior of Multilayer Al/SiC Thin Films
… such as hardness and Youngs modulus, of bulk and thin film materials. Multilayer thin films are an important subset of materials in which alternating layers of two or more materials are deposited on a substrate. Fabrication of multilayer films can result in imperfect layer geometry, particularly …
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Structure and epitaxy studies of cobalt silicide/silicon heterostructures
… diffusion, silicide spike formation during CoSi thin film growth, and volumetric contractions during the CoSi $\to$ CoSi$\sb2$ phase transformation. Multilayer Si$\sb{\rm a}$/Co/Si$\sb{\rm c}$ thin film deposition is an effective processing technique for controlling microstructure and preventing …
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Surface and Interface Magnetism in Nanostructures and Thin Films
… magnetism of composite nanoparticles and multilayer thin films by using conventional DC magnetization and AC susceptibility as well as transverse susceptibility, a method for directly probing the magnetic anisotropy of materials. Au and Fe3O4 synthesized together into three different …
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Electrostatic Self-Assembly of Biocompatible Thin Films
… technique for the manufacturing of biocompatible thin film coatings. The ESA process is based on the alternating adsorption of molecular layers of oppositely charged polymers/nanoparticles, and can be applied in the fabrication of well-organized multilayer thin films possessing various …
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Preparation and characterization of Mo/Al layered thin films
The fabrication of bilayer and multilayer Mo/Al thin films using a conventional multi-target rf-diode sputter deposition system was studied. The films were deposited on glass and Si( 100) substrates. The as-deposited films were characterized with respect to their structure and composition profiles …
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Nanotermites multicamadas de Al/NiO sintetizadas por Magnetron Sputtering
… synthesized and characterized in the form of multilayer thin films, synthesized by magnetron sputtering of Al / NiO with different stoichiometries. Some compositions have shown released amount of heat of about 1.7 kJ /g, which is somewhat below the maximum achieved by similar compositions, …
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Interface-driven spin-orbit torques in magnetic heterostructures
… memory and logic devices. Simple multilayer thin films or "heterostructures" such as Pt/Co have broken inversion symmetry, so a charge current gives rise to net spin current. Electrical and optical measurements reveal the effect of spin current on the magnetization, including …
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Poly(vinyl alcohol) based hydrogen-bonded multilayers : from pH-controlled multi-stage dissolution to zwitter-wettable surfaces
… the structure and function of synthetic polymer thin films is of fundamental and practical significance for developing a diverse range of functional surfaces including antifogging coatings, switchable surfaces and stimuli-responsive hydrogels. The first part of this thesis is focused on extending …
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Hydrogen-bonded layer-by-layer assembly of poly(vinyl alcohol) and tannic acid
Hydrogen-bonded multilayer thin films containing tannic acid (TA) and poly(vinyl alcohol) (PVA) were assembled under different pH conditions, and film growth and dissolution behavior was assessed through profilometry. Optimal film growth was achieved at pH 4.0, which contrasted with uncontrollable …
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Dynamic and quasi-static contact and scratch analysis of micro-nanoscale thin solid films with application to magnetic storage hard disk drives
… ensuing contact or impact related behavior of thin solid films used in these systems is of paramount importance for improved design and reliability. In modern micro/nanodevice technologies significant emphasis has to be placed on the design of thin-films which can provide the required contact …
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Computational modeling and design of multilayer corrosion coatings for galvanic protection of steel
… has permitted the efficient deposition of multilayer metallic coatings, which offer tremendous potential for dramatic improvements in performance relative to single layer coatings. However, development of multilayer corrosion coatings is hampered by a number of obstacles, in particular the …
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Planar Multilayer Thin Film Coatings for Passive Winter Thermal Management
… We investigate the applicability of planar multilayer thin films consisting of low cost materials for this purpose. Our study led to the proposals of two designs that predict temperature rise of 21 K and 25 K, while maintaining mean visible transmittance over 60%. We experimentally observed …
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