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 33 for “"superhydrophobicity"”.
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Nanostructured electrospun fibers : from superhydrophobicity to block copolymer self-assembly
Electrospinning has emerged in recent years as a relatively easy, efficient and robust method to make ultrafine continuous fibers with diameter on the order of -100 nm from a variety of materials. As a result, numerous applications for electrospun fibers have already been demonstrated including the …
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Investigating Wetting Characteristics on Microstructured Surfaces for Superhydrophobicity and Metal Microcasting
… suspended on fewer asperities. Curvature affects superhydrophobicity because microscopic curvature changes solid-liquid interaction, pitch is altered, and curvature changes the shape of the three phase contact line. This dissertation presents a model of droplet interactions with curved …
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Investigating wetting characteristics on microstructured surfaces for superhydrophobicity and metal microcasting
… suspended on fewer asperities. Curvature affects superhydrophobicity because microscopic curvature changes solid-liquid interaction, pitch is altered, and curvature changes the shape of the three phase contact line. This dissertation presents a model of droplet interactions with curved …
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Inducing superhydrophobicity in aluminum and concrete: implications on durability and performance
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-12-01
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Nature-inspired systems exploiting porous media for multiphase flows
… (1) How multilayered feathers enhance underwater superhydrophobicity. Inspired by ducks, here we demonstrate that air pockets can withstand up to five times more hydrostatic pressure when using stacked layers of synthetic feathers instead of a single layer. The mechanism for the multi-layered …
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Design and microfabrication of multifunctional bio-inspired surfaces
… water-walking insects. The lotus leaf features superhydrophobicity, which leads to low adhesion and self-cleaning. Sharkskin is composed of ripples that manage to reduce skin-friction and thus drag resistance. The Namib Desert beetle, harvests water from the heterogeneous pattern having …
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Fabrication and Dynamic Tuning of Periodic Structures From Holographic Lithography
… wings which show both structural color and superhydrophobicity, 3D diamond photonic crystals with controllable nano-roughness (≤ 120 nm) were fabricated from epoxy-functionalized cyclohexyl polyhedral oligomeric silsesquioxanes (epoxy-POSS). The nano-roughness was generated due to microphase …
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Design and fabrication of novel nanofiber membranes via electrospinning technique for membrane distillation
… led to enhanced membrane properties such as superhydrophobicity and anti-wetting property. And their MD performances have been compared with the ones in the previous reports. This study may therefore contribute to future MD researches regarding using electrospinning for the developments of a …
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Wetting of non rigid surfaces
… take advantage of the non-wetting properties of superhydrophobicity. This thesis presents a novel production method and subsequent analysis of thin, conformable, superhydrophobic films based on the embedding of carbon nano-particles (CNPs) into the surface of polydimethylsiloxane (PDMS) …
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Advanced transfer printing methods and their applications to functional surfaces
… functionality such as structural coloration or superhydrophobicity paired with external stimuli responsiveness are invented. Lastly, switchable underwater adhesive properties of a shape memory polymer that is one of common polymeric stamp materials are investigated. Furthermore, these advances …
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Studies on Corrosion, Fouling and Durability of Advanced Functional Nonwetting Surfaces
… electrochemical methods to elucidate the role of superhydrophobicity and other parameters on corrosion inhibition. The anti-corrosion properties of SHS and LIS were systematically studied over a range of temperatures (23°C–90°C) to simulate an actual condenser environment. Moreover, the …
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Superhydrophobic membranes for membrane distillation and crystallization
… of superhydrophobic membranes, but once superhydrophobicity was achieved, there was negligible impact on membrane distillation performance. However, the presence of a superhydrophobic surface significantly improved the desalination performance of the membranes, with higher salt rejection …
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Structure and Morphology of Photoreactive Monomer–Nanoparticle Mixtures Under Patterned Irradiation
… contact angles revealed an optimum beyond which superhydrophobicity decreased. Exemplary processability and anti–wetting behavior of these materials was demonstrated. Additionally, Fe3O4–containing polymer pillars were fabricated for stimuli–responsive materials. Although polymer …
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High-throughput plasma nanomanufacturing and its applications
… surface-enhanced Raman scattering, and superhydrophobicity and “coffee ring” elimination. Furthermore, a plasmonic nanoarray was fabricated with SPERISE process and incorporated in an electrically-stimulated biological microfluidic system to create an electro-optofluidic biosensor for …
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Fog Harvesting: Inspired by Spider Silk
… chemicals is one of the solutions. However, superhydrophobicity is not durable and it may contaminate the collected water. In addition, it requires a high professional maintenance and laboratory operation standard. As a result, it is impractical to set such fog collectors in regions and …
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Black silicon and its applications in photovoltaics and biosensing
… molecular deposition is attributed to the superhydrophobicity and localized pinned liquid–solid–air interface on the silver-coated silicon nanocone surface. The unique surface properties of the presented nanocone surface enabled high-density, high-uniformity probe spotting beneficial for …
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Micro- and nanoscale features of insect cuticle and their impacts on wetting, friction, and optical properties
… and microscale structures are able to achieve superhydrophobicity. Diffraction gratings, regular slits, grooves, or other structures with nano- or microscale spacing, have long been known to create iridescent beetle elytra or abdominal tergites. Beetles and other organisms with …
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Interfacial engineering to control phase transitions : applications in icing and mineral scale fouling
… in this thesis to address these problems - superhydrophobicity, lubricant-impregnation and active electric fields. While micro-textured superhydrophobic surfaces have been shown to be bad for anti-icing due to the formation of frost between the surface textures, I demonstrate low ice …
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Liquid manipulation using engineered carbon nanotube surfaces
… hydrophobic surfaces. This was inspired by the superhydrophobicity and anisotropic droplet roll-off on Morpho aega butterfly wings. By video microscopy, we reveal that extreme deflections of the individual scales are responsible for directional adhesion. Inspired by this finding, I demonstrate a …
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Enhanced phase change heat transfer through advanced fabrication techniques
… condensation, researchers have also investigated superhydrophobicity itself using various materials, structures, and non-polar coating techniques for versatile applications. The studies herein mainly focus on gaining fundamental understanding of water vapor nucleation on intrinsically designed …
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