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 41 for “"metal substrates"”.
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Supramolecular organisation, conformation and electronic properties of porphyrin molecules on metal substrates
… level studies of porphyrin molecules adsorbed on metal surfaces via Low Temperature Scanning Tunneling Microscopy/Spectroscopy (STM/STS), supported by complementary X-ray absorption experiments. Intermolecular and molecule-surface interactions of tetrapyrdil porphyrin (TPyP) on Ag(111) and Cu(111) …
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A COMPUTATIONAL STUDY OF BONDING INTERACTIONS AND SURFACE CHEMISTRY ON METAL SUBSTRATES
… bonding interactions and chemical reactions on metal surfaces. The thesis begins by discussing the surface-molecule and intermolecular interactions involved in halogen bond interactions. Subsequently, the intramolecular ring-opening reactions of a non-halogenated azulene moiety are studied. The …
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Plasma-assisted deposition of chromium, fluorocarbon and chromium/carbon/fluorine films on glass, polymer and metal substrates
… (PTFE), and low carbon, cold rolled steel substrates has been studied. Depositions were conducted in an internal electrode, radio frequency sputter deposition system at 100 W of power for one hour. Argon and C$\sb2$F$\sb6$ gases were used as the glow discharge media and characterization of …
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Probing the Properties of the Molecular Adlayers on Metal Substrates: Scanning Tunneling Microscopy Study of Amine Adsorption on Au(111) and Graphene Nanoislands on Co(0001)
… both of which are studies of molecules on metal surfaces by scanning tunneling microscopy (STM). The first topic is on adsorption of a model amine compound, 1,4-benzenediamine (BDA), on the reconstructed Au(111) surface, chosen for its potential application as a molecular electronic device. …
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Design & Fabrication of Super-Hydrophobic Surfaces by Laser Micro/Nanoprocessing
… most common used materials, including glass and metal substrates by laser micro/nano-processing, are presented in this thesis. Three techniques have been developed to successfully make super-hydrophobic surfaces on glass and metal substrates. The first technique is to make super-hydrophobic …
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Naujų metodų metaliniams kultūros paveldo dirbiniams konservuoti kūrimas ir taikymas /
Metals conservation involves the preservation of cultural objects. The goal is to preserve objects while retaining evidence of their cultural context and integrity. Ideally there should be a minimum change to an object while achieving this and restoration to the former state is rarely carried out. …
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Naujų metodų metaliniams kultūros paveldo dirbiniams konservuoti kūrimas ir taikymas /
Metals conservation involves the preservation of cultural objects. The goal is to preserve objects while retaining evidence of their cultural context and integrity. Ideally there should be a minimum change to an object while achieving this and restoration to the former state is rarely carried out. …
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Advances In The Electrodeposition Of Tantalum From Ionic Liquids In A Technical Plating Setup
<p>Tantalum is a tough, ductile, refractory metal that is highly corrosion resistant. The corrosion resistance of tantalum is evident in diverse conditions, including high temperature and severe chemical environments. Application of a tantalum layer onto other metal substrates would be a beneficial …
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A study of the growth and structure of chromium and iron oxide films on Pd(001) using X-ray photoelectron diffraction and low energy electron diffraction
… techniques, were used to grow these transition metal oxide films. The study is a part of a larger project that aims to look into the interaction between metal substrates and the overlayers grown on them. Previous studies of oxide films on Ag(001) resulted in the growth of 4-fold and 3-fold …
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Polydimethylsiloxane-Based Self -Healing Composite and Coating Materials
… polymer coatings which prevent corrosion of a metal substrate after deep scratch damage. The anti-corrosion properties of the self-healing polymer on metal substrates are investigated by corrosion resistance and electrochemical tests. Even after scratch damage into the substrate, the coating is …
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Field-Grading in Medium-Voltage Power Modules Using a Nonlinear Resistive Polymer Nanocomposite Coating
… such as altering the geometry of the insulated-metal-substrates or thickening or stacking them, exhibit limited efficacy, inflate manufacturing costs, raise reliability concerns, and increase thermal resistance. This dissertation explores a material-based approach that utilizes a nonlinear …
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Electrostatic transfer of graphene grown on copper foil and nanosoldering of carbon nanotube junctions
… Typically, transferring graphene grown on metal substrates involves wet etching steps in order to separate graphene from its metal growth substrates. During these wet etching steps, however, residues and wrinkles can be easily introduced in graphene and degrade its quality. By using …
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High-Velocity Impact of Metal Microparticles
… are presented which use the LIPIT to impact metal microparticles onto metal substrates across a range of controlled velocities. An ultrahigh-speed camera records the resulting rapid deformation of the impacting microparticles and impacted substrates, and post-mortem characterization is …
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Chemical vapor deposition (CVD) growth and optimal transfer processes for graphene
… large area graphene crystals on transition metal catalyst substrates. In particular, Cu with low carbon solid solubility is suitable to obtain uniform single layer deposition of graphene over large areas. Here, we report reliable method to grow high-quality continuous graphene film by CVD. …
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A Study of Dew Harvesting and Freezing Performance of Non-Wetting Surfaces
… surfaces offer enhanced capabilities over bare metal substrates for condensation with or without phase change. This trait can be utilized to broaden strategies in combating water scarcity in water stressed areas. Slippery lubricant infused surfaces have the ability to shed water droplets with …
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Electrochemical mechanisms in nano-structured graphitic and redox-active polymeric architectures
… impermeable interface. Outer-sphere reactions on metal substrate-modulated graphene prove the electronic transparency of the graphene interface. Inner-sphere oxygen reduction reaction activity changes demonstrate the electronic coupling between metal substrates and molecular adlayers above …
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Relationship between molecular structure and surface properties of self-assembled monolayers
… investigated for use as an adhesion promoter for metal substrates, and for corrosion protectors of the metal surface. Gold substrates modified by adsorption of 3- and 4-aminothiophenol monolayers, 3- and (4-mercaptophenyl) phthalimide (MPP) monolayers, and by reaction of the 3- and …
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Synthetic investigation of Mn(I) and Re(I) N-heterocyclic carbene complexes
… of low valent rhenium and manganese transition metals. Diverse methods of synthesis were studied. The direct approach, in which the ylidene obtained from deprotonation of 1,3-bis(2,4,6- trimethylphenyl)imidazolium chloride was added to the metal substrate, proved to be unsuccessful as isolation …
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Laser welding of metallic glass to crystalline metal in laser-foil-printing additive manufacturing
"The application of metallic glasses has been traditionally limited to parts with small dimensions and simple geometries, due to the requirement of fast cooling during the conventional process of casting. In addition, joining metallic glass to crystalline metal is of interest for many applications …
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Process Optimization and Cost Analysis of Electrochemical Micromachining for Volume Manufacturing
… in various designs and materials, including metals such as stainless steel and titanium. Electrochemical micromachining (ECMM) is a powerful method for manufacturing small channels (~0.1mm) on metal substrates which can be later made into metal microfluidic devices, but so far, it has only …
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