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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 18 of 18 for “"Optical Profilometry"”.
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ADDITIVE MANUFACTURING OF SUPERHYDROPHOBIC STAINLESS STEEL COMPOSITES
… (SEM), powder x-ray diffraction (XRD), and optical profilometry. Although the composites were successfully mixed and printed, it was found that the surfaces remained hydrophilic due to the macroscopic nature of the surface roughness created through the LP-DED printing process. The basis for …
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Experimental and simulation analysis of the jitter response of a single-shot oil switch with a high-K particle suspension
… and a suite of diagnostics such as SEM imagery, optical profilometry, water titration, mass-spectrometry, and particle measurements. The dissertation discusses several methods to successfully reduce the switch jitter of a self-break oil switch.
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Integrating nanostructured artificial receptors with whispering gallery mode optical microresonators via inorganic molecular imprinting techniques
… Silica microsphere Whispering Gallery Mode optical microresonators are coated with a silica thin film templated by a small fluorescent dye, fluorescein isothiocyanate, which serves as our model target. Oxygen plasma degradation and solvent extraction of the template are compared. Extracted …
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A skin surface characterization system based on capacitive image analysis
… achieved by using conventional methods, such as optical or mechanical profilometry for example, their use is quite limited primarily to the high cost of the instrumentation required, which in turn is usually cumbersome, highlighting some of the limitations for a routine based analysis. This …
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Age effect on presence, susceptibility and treatment of erosive tooth wear
… was determined during and after the cycling, by optical profilometry. Similar protocol was adopted in the third study with the addition of toothbrushing abrasion to the model, in order to explore the interplay between age and toothpaste abrasivity on erosion-abrasion development. SL was measured …
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Synthesis and Characterization of Ag and Cu doped DLC Thin Films for Anti-microbial Applications
… films were assessed through nano-indentation, optical profilometry, Rockwell C indentation, and pin-on-disk wear testing against ultra-high molecular weight polyethylene (UHMWPE) countersurfaces in a 0.9 wt.% NaCl solution under a 10 N load. The electrochemical corrosion performance was …
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Bonding properties of innovative CAD-CAM composite biomaterials for dental prostheses
… Surface characterization was performed using optical profilometry to measure the developed interfacial area ratio (Sdr) and scanning electron microscopy. Results showed that PICNs exhibit higher bonding ability to resin cement than dispersed filler materials. Moreover, due to their specific …
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Skin friction drag reduction in turbulent flows using superhydrophobic surfaces
… was further characterized through non-contact optical profilometry, and a number of surface statistical parameters quantifying the vertical and lateral length scales of roughness features were computed from the measured height profile. These were then compared with the experimentally determined …
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A real-time multi-sensor 3D surface shape measurement system using fringe analysis
… to choose from amongst several different fringe profilometry methods and to manipulate their settings interactively. The system has been designed specifically to measure dynamic 3D human body surface shape and to act as an enabling technology for the purpose of performing Metrology Guided …
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Effects Of Bond Coat Surface Preparation On Thermal Cycling Lifetime And Failure Characteristics Of Thermal Barrier Coatings
… and thermally-cycled TBCs were characterized by optical profilometry (OPM), photo-stimulated luminescence spectroscopy (PSLS), optical microscopy, scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS), and scanning/transmission electron microscopy (TEM/STEM) …
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Ability of Caries Detection Methods to Determine Caries Lesion Activity
… (Ra) were acquired using non-contact optical profilometry. Two-dimensional minimum (2D-min), maximum (2D-max), average (2D-avg) SL and three-dimensional (3D) analyses, volume and depth of lesions were determined from µCT image analysis. A series of fluorescence images were acquired at …
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Blister Test for Measurements of Adhesion and Adhesion Degradation of Organic Polymers on AA2024-T3
… surface topography were studied by the BT and Optical Profilometry, using AA2024-T3 substrates coated with polyvinyl butyral (PVB). Random abrasion generated a surface with lower average roughness than aligned abrasion due to the continual cross abrasion of the grooves. The BT could discern the …
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Incorporation of Nonconventional Crystalline Materials onto the Integrated Photonics Platform
… These advanced devices require electrical and optical properties that, in some cases, can only be provided by truly single-crystal thin-films of nonconventional materials, such as lithium niobate (LN, LiNbO3), yttrium aluminum garnet (YAG, Y3Al5O12) and diamond. In order to incorporate those …
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Hydrogen evolution and transport in semiconductors
… Ge and Si was examined by ion beam analysis, optical profilometry and microscopy, to establish the influence of lattice damage and hydrogen evolution. In particular, hydrogen-induced blistering and crater formation under thermal annealing from T=300-650 degrees Celsius was studied to determine …
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Hydrogen evolution and transport in semiconductors
… Ge and Si was examined by ion beam analysis, optical profilometry and microscopy, to establish the influence of lattice damage and hydrogen evolution. In particular, hydrogen-induced blistering and crater formation under thermal annealing from T=300-650 degrees Celsius was studied to determine …
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Pen-on-paper electronics
… a concentrated silver ink. We introduce an optical profilometry method to map the topography of the complex surface and dynamically adjust the height of the printing nozzle to within 15 +/- 5 microns of the surface during printing. The flexible polyimide PV devices are thermally annealed at …
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Characterisation and Evaluation of Thermally Treated Recycled Glass for Mass Finishing and Superfinishing Processes
… based on residual imprint measurements using 3-D optical profilometry. The outcomes show that by measuring contact area with the new method the overall relative error in the obtained mechanical properties is improved. A combined Finite Element Analysis FEA and optimization algorithm has been …
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Fourier Transform Interferometry for 3D Mapping of Rough and Discontinuous Surfaces
Of the wide variety of existing optical techniques for non-contact 3D surface mapping, Fourier Transform Interferometry (FTI) is the method that most elegantly combines simplicity with high speed and high resolution. FTI generates continuous-phase surface maps from a projected optical interference …