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 16 of 16 for “"Thin metal film"”.
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Block copolymer-templated iron oxide nanoparticles for bimodal growth of multi-walled carbon nanotubes
… via CVD typically involves depositing a thin metal film on a silicon substrate, and heating the substrate so that the thin metal film dewets and forms metallic nanoparticles. A hydrocarbon gas is then flowed over the nanoparticles to initiate carbon nanotube growth. Though these thin …
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Ultrasonic Modification of Condensation Processes
Condensation processes of a thin metal film are a direct result of interfacial energies. The realationships between these energies are virtually identical to those between an adhesive that wets a solid substrate. Using adhesion as a model, a method of modifying the interfacial energies of a gold on …
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Study on the photoelectric hot electrons generation and transport with metallic-semiconductor photonic crystals
Photoelectric hot carrier generation in metal-semiconductor junctions allows for optical-to- electrical energy conversion at photon energies below the bandgap of the semiconductor. Which opens new opportunities in optical sensors and energy conversion devices. In this thesis research, the …
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Fabrication of extremely smooth blazed diffraction gratings
… number materials, such as gold. Deposition of thin metal film often develops residual stress that adds out-of-plane distortion. In this thesis the out-of-plane distortions due to thin metal films are analyzed using wavefront aberration functions known as the Zernike polynomials. The thin film …
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The Electrical Properties And Microstructure Of An Ion Beam Mixed Metal-Polymer System
Ion beam mixing of the surface of polymers with metal films is done by ion implanting through a thin metal film. The metal layers are evaporated on the polymer substrate surface before ion implementation. A 50keV, nitrogen ion beam with a dose in the range of 10¹⁶ ions/cm² and a dose rate current …
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Development of a direct-force-reading, thin-film shear stress gage
A thin-film gage was designed, constructed, and tested for the measurement of skin friction in steady and non-steady flows. This direct-force-reading gage is designed to have a high frequency response (> 1 kHz), high temperature capability (800 K), and full directional sensitivity in both subsonic …
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Functional nanostructured plasmonic materials: fabrication, simulation, imaging and sensing applications
… to changes in refractive index occurring at a metal/dielectric interface and their ability to significantly enhance electromagnetic fields near a metal, offer exciting opportunities for real-time, fully label free forms of chemical/biological detection and field-enhanced applications including …
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Expanding ultrafast photoacoustics for investigation of mechanical properties and thermal transport
… acoustic phonon frequency bandwidth and range, a thin metal film, a strongly magnetostrictive galfenol film, and strained piezoelectric InGaN/GaN multiple quantum wells were used as transducers. Acoustic wave detection methods included monitoring of optical transmittance/ reflectance, …
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Exploration of grating-based surface plasmon resonance systems for wave vector matching to enhance plasmon modes and preliminary surface plasmon-enhanced fluorescence interrogation
… oscillation of conductance band electrons in a metal. The most common experimental method to excite surface plasmon resonance is with light through a coupling mode (prism, grating, waveguide, etc). The work presented in this thesis uses experimental observations of surface plasmon resonance, …
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Surface plasmon-coupled emission for applications in biomedical diagnostics
… couple into the surface plasmon of an adjacent metal layer resulting in highly directional emission in the region of the surface plasmon resonance (SPR) angle. As well as the high directionality of emission, SPCE has the added advantage of surface selectivity in that the coupling depends on the …
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Fabrication, design, and analytical applications of nanostructured plasmonic crystals
… electron density occurring at the interface of a metal and a dielectric, which generate an evanescent electric field that decays exponentially within ~100-200 nm from the surface of the metal. Because this enhanced electromagnetic field is highly sensitive to local optical property changes, SPRs …
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Thermodynamic stability of Vo2-Metal thin films
Thermodynamic stability of VO2 in contact with metals was conducted on solid thin metal films. The VO2 film was synthesized on a corning glass under optimized condition parameters using rf magnetron reaction sputtering. The samples with structure glass/VO2 were then taken for optical …
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Multiwavelength Surface Plasmon Resonance Sensor Designs for Chemical and Biochemical Detection
… optic and bulk waveguides such as prisms. A thin metal film is deposited on the waveguide surface to support the surface plasmon (SP) mode. The evanescent field produced by light propagating through the waveguide can be coupled into the surface plasmon mode thus attenuating the transmitted …
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TOWARD ENHANCED BIMODAL SENSING: TIO₂-COATED METALLIC NANOSTRUCTURES FOR ELECTROCHEMICAL ANDPHOTOELECTROCHEMICAL DETECTION
… and optimization of titanium dioxide (TiO2) thin films for electrochemical and photoelectrochemical sensing applications. After preparing TiO2 films via a sol-gel process, using titanium isopropoxide as a precursor, a systematic investigation of sol aging revealed a strong dependence between …
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An experimental study of light-material interaction at subwavelength scale
… the resonant oscillation of electron plasma in metal, plasmonics offers new opportunities for manipulating light at the subwavelength scale. This dissertation investigates the effects of electromagnetic field confinement on light-material interaction inside nanoscale metal-dielectric composite …
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Nanocomposite-graphene based platform for heavy metal detection
… Nafion-Graphene in combination with a mercury film electrode, bismuth film electrode and antimony film electrode was used as a sensing platform for trace metal analysis in 0.1 M acetate buffer (pH 4.6) at 120 s deposition time, using square-wave anodic stripping voltammetry (SWASV). Detection …