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 30 for “"Surface patterning"”.
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An Investigation of Dolphin-Groove Inspired Surface Patterning on Flow Control
… plate (non-grooved) wall cases. The grooved surfaces form embedded vortices within the sinusoidal cavities which can lead to a partial slip condition effect in the wall vicinity. DPIV results quantify momentum adjacent to the grooved surface and the corresponding flow separation. Separation …
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Surface Patterning, Electronic Device Fabrication And, Three-Dimensional Self-Assembly Using Polydimethylsiloxane
… (UVO) exposure mask, which allows for the photopatterning of UVO modifications of PDMS surfaces. This modification enables the direct photoinitiated patterning of discrete PDMS patterns without the use of a master. The UVO activated PDMS regions are chemically bonded to oxide bearing surfaces …
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Surface Patterning and Rotordynamic Response of Annular Pressure Seals Used in Turbomachinery
… circumferential indentions on the stator/rotor surface that serve as cavities where flow recirculation occurs. As the working fluid enters the cavities and recirculates, the kinetic energy is reduced, resulting in a reduction of leakage flow. The current challenge is to model with higher …
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Adsorption and multilayer assembly of charged macromolecules on neutral hydrophobic surfaces and applications to surface patterning
… chemical sensors. This thesis studies chemical surface patterning utilizing polyelectrolyte multilayers for electronic and biological applications. It focuses on both fundamental study and application development in the field of layer-by-layer self-assembled composite thin films, with the goal …
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Coupling electrolysis and surface patterning to improve onset of nucleate boiling and bubble departure in pool boiling heat transfer
… generated hydrogen bubbles near the heating surface can significantly increase nucleation site density at low superheat, while patterned gold thin-strip surfaces facilitate coalescence-induced bubble departure, thereby further enhancing boiling performance. To verify this hypothesis, a pool …
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The heterogeneous biochemical modification of porous collagen scaffolds for tissue engineering applications
… The use of a two photon excitation for BP patterning was proven affective for surface patterning but ineffective for patterning past a couple hundreds of microns. Heterogenous scaffold patterning in all three dimensions was achieved by collagen slurry layering prior to scaffold freeze …
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Micro- and nano-scale polymer-on-polymer stamping of the polyelectrolytes SPS and PDAC
… has emerged as a promising new technique for patterning micron scale features with a wide variety of materials. Most of the materials examined have been small, reactive molecules patterned on surfaces they are chemically attracted to, like thiols on metals or silanes on glass and metal oxides. …
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Tunable surface topographies via particle-enhanced soft composites
… can generate, on demand, custom and reversible surface topographies, with surface features that can be highly localized. These features can be specifically patterned or alternatively can be random in nature. Our PESC samples comprise a soft elastomeric matrix with stiff particles embedded below …
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An analysis of through-hole punching in PMMA with varied process parameters
… ability to combine through-hole punching with a surface patterning during microembossing would greatly enhance the production of a variety of microfluidic devices. In support of that goal, a series of theoretical simulations and physical tests were performed to investigate the effect of …
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AFM-Assisted Nanofabrication using Self-Assembled Monolayers
… nm. Thus, we are able to demonstrate a degree of surface patterning which is an order of magnitude smaller than that used in the semiconductor industry. One efficient strategy for creating chemically specific nanostructures is to use the extraordinary catalytic properties of enzymes. However, as …
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Manufacturing conductive patterns on polymeric substrates : development of a microcontact printing process
… applications in flexible electronics, optics, surface patterning, organic micromanufacturing, and photovoltaics. After an initial exploration of various micromanufacturing processes, microcontact printing (μCP) was chosen as the most promising technique for further study. By using μCP to …
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Aspects Of Nucleation: Fluctuations, Nonuniform Order, And Curved Surfaces
… may happen when these transitions occur on the surface of a sphere. Next we identify pollen cell surface patterning as an instance of this transition from disorder to a patterned state of matter on the surface of a sphere. The character of the transition is found to be first-order, which leads …
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Assembly and detection of viruses and biological molecules on inorganic surfaces
… the ways in which interactions between inorganic surfaces and biological molecules can be advantageously exploited. The first project entitled, Biomolecular Recognition of Crystal Defects extended the phage display technique to the detection of crystal defects. The system used is based on the M13 …
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A direct-write thick-film lithography process for multi-parameter control of tooling in continuous roll-to-roll microcontact printing
… high-throughput process for large-area surface patterning, flexible electronics and engineered meta-surfaces. Efforts to implement this hybrid process have been limited by the inability to monitor and control the process and the lack of a continuous large-area polymer tool that embodies …
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Additive Fabrication and Soft -Lithographic Patterning of Microelectronic Devices
… selective film deposition and soft-lithographic patterning techniques to microelectronic device fabrication. Chapter 2 describes how microcontact printing of organic self-assembled monolayers (SAMs) can be used to induce selective chemical vapor deposition (CVD) of platinum and palladium metal …
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The Design Of A Nanolithographic Process
… a nanolithographic process for nanometer scale surface patterning. The process involves the combination of serial atomic force microscope (AFM) based nanolithography with the parallel patterning capabilities of soft lithography. The union of these two techniques provides for a unique approach to …
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Transforming shape: a simultaneous approach to the body, cloth and print for garment and textile design (synthesising CAD with manual methods)
… The contrasting spatial characteristics and surface patterning inherent in these models provided tlýe theoretical and practical framework for the research. Design approaches such as'textile-led', 'garment-led'and 'the garment as canvas' highlighted the originality of the simultaneous design …
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Quantitative Analysis and Imaging-Based Insights Into The Characteristics and Mechanisms of Yeast Pattern Formation
… patterns. Although the molecular regulations of surface patterning have been well characterized in bacteria, the mechanisms underlying the complex pattern formation in eukaryotic biofilms remain unclear.</p> <p>This dissertation aims to investigate the salient features of robust colony expansion …
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Computer-Guided Design of Photocatalyst for PET-RAFT Polymerisation
… in advanced macromolecular synthesis such as surface patterning, 3D/4D printing, polymeric micelles, multiblock antimicrobial polymers with precise sequences and architectures. All these unique features of photo-controlled polymerisation are largely dependent on properties and functionalities …
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DNA-based Artificial Mimics of Cell-surface Machinery
… exhibited by biological interfaces, such as surface patterning, cargo transport, and lipid domain sculpting. In addition, I show how membrane phase transitions enable reshuffling the content of proto-cells, leading to the assembly of functional nucleic acids in daughter proto-cells. …
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