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 21 for “"tunable surface"”.
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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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Nonlithographic manufacturing of 1-D silicon nanostructures with tunable surface morphology via thermal dewetting and metal-assisted chemical etching
… (SiNWs) with controlled side-wall profile and surface morphology. The approach begins with silver (Ag) thin-film thermal dewetting, gold (Au) deposition and lift-off to generate a large-scale Au mesh on Si substrates. Followed by metal-assisted chemical etching (MacEtch), where the Au mesh …
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Droplet manipulation on structured shape memory polymer surface
While methods for dynamic tuning of surface wettability to manipulate water droplets have been widely explored for many applications including digital microfluidics, those based on dynamically changeable surface morphology have remained challenging to achieve. In this work, we present a structured …
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Design of ultra-robust supramolecular assemblies and their application to water treatment
… small molecule nanostructures with high surface areas, tunable surface chemistries, and pristine internal order. Conventionally, the dynamic nature of these systems has constrained their use to specific cases in primarily biomedical applications. Here, I present the design of molecular …
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OPTIMIZATION AND CHARACTERIZATION OF SELF-ASSEMBLED POLY(STYRENE-B-(3,4-ISOPRENE-STAT-1,2-ISOPRENE) BLOCK COPOLYMER THIN FILMS
Block copolymer thin films with tunable surface chemistry and nanoscale self-assembled structures are promising candidates as advanced templates for inorganic crystallization. Their periodic order, nanoscale spacing and precise control of surface chemistry in one block allow them to confine the …
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Supramolecular Nanostructures as Support Materials for Gold Nanoparticle Catalysts
… precise control over spatial arrangements and tunable surface chemistries. A particularly promising self-assembled molecule is the aramid amphiphile (AA), which overcomes the typical mechanical fragility of self-assembled structures by incorporating a Kevlar-inspired domain into its molecu- lar …
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Modular Nanoparticles for Selective Cell Targeting
… The goal of this thesis was to develop NPs with tunable surface properties for selective cell targeting. Specifically, polyelectrolyte complexes composed of heparin (Hep, a growth factor binding glycosaminoglycan) and poly-L-lysine (PLL, a homopolymeric lysine) were prepared via a pulse …
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Surface-emitting lasers for communications: novel metal-cavity microlasers and high-contrast-grating tunable VCSELs
… study of the theory and experiments of surface-emitting semiconductor lasers is presented. The design of novel micro and nanolasers using metal cavities for optical confinement is discussed. Theoretical modeling of quantum-well and quantum-dot emission properties, as well as experimental …
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Magnetic tunable microstructured surfaces for thermal management and microfluidic applications
Micro and nanostructured surfaces have broad applications including heat transfer enhancement in phase-change systems and liquid manipulation in microfluidic devices. While significant efforts have focused on fabricating static micro/nanostructured arrays, uniform arrays that can be dynamically …
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Silica Nanoparticle-Based Platform for Rare Earth Element Recovery and Separation
… into REE separations due to their high surface area, tunable surface chemistry and environmental compatibility. Their scale offers several advantages, including high surface-to-volume ratio, integration into dynamic architectures, and stabilization of complex structures. These features …
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Morphology Controlled Synthesis of Copper Based Multimetallic Nanostructures and Their Electrocatalytic Properties for Methanol Oxidation Reaction
… Copper nanomaterials (Cu NM) with specific surface facets can tailor their catalytic activity. Understanding reagents responsible for Cu NM growth is important for morphology-controlled synthesis of the nanostructures. This research studies the halide influence on Cu NM growth and morphology …
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Vibrating lubricant-infused porous surface for enhanced liquid droplet transport
Lubricant-infused porous surfaces (SLIPS) demonstrate extreme liquid repellency such that a droplet immiscible with the lubricant can roll off at a very small tilt angle < 5°. There have been many applications in using SLIPS to achieve complex fluids handling, anti-fouling, self-cleaning, …
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Design and synthesis of biocompatible fluorescent semi-conductor nanocrystals for in-vivo and in-vitro imaging/sensing applications
… their solution properties via the tunability of surface ligands. The primary focus of this thesis is the design and synthesis of new ligand coatings to render QDs water soluble, pushing the boundaries of QD applications in biology both in-vivo and in-vitro. On the in-vivo front, ultrasmall QDs …
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Nanoscale imaging of MXenes by X-ray microscopy
… offer a combination of metallic conductivity and tunable surface properties, making them ideal candidates for energy storage devices like batteries and supercapacitors. Despite their potential, fundamental questions remain regarding the intercalation and redox mechanisms of individual MXene …
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Influence of Ag Nanoparticle Loading on Dye and Salt Removal Efficiency of Graphene Oxide Membranes
… due to their high mechanical strength, tunable surface chemistry, and exceptional molecular sieving properties. However, despite these advantages, the practical deployment of GO membranes in aqueous environments is hindered by critical limitations, most notably, structural swelling and …
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Exploiting polar interfaces for photocatalytic water splitting: application to the anatase-cuprous oxide heterojunction
… it may be possible to realize tailored surface chemistries that are optimized for oxidation and/or reduction. To demonstrate this concept, we computationally explore the intersection of finite size effects and surface polarity compensation mechanisms in the anatase (TiO2) / cuprous oxide …
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Development of polymeric nanoparticle vaccines for immunostimulation
… to secondary lymphoid sites and 2) providing a tunable surface for loading B cell antigen epitopes in a specific conformation to drive epitope-specific antibody response. In recent decades, TLR mechanisms have been elucidated and novel agonists have been developed, yet our generation still has …
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Inorganic nanoparticles for applications in biomedical sciences
… emerging fields in recent times. Small size, tunable surface properties and efficient drug loading capacity are some of the properties that make them a promising option for various applications in biological sciences. Using nanocarriers for drug delivery offers several advantages like delivery …
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Elastomeric microsystems fabricated using transfer printing
… printing. Functional devices such as responsive surfaces and vibration energy harvesters are constructed to demonstrate the benefits of the unconventional elastomeric microsystem. Such devices outperform rigid systems regarding large deformation capability and providing additional design and …
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Wettability of graphitic materials and their application in separation
… tribology, and adsorption. This important surface property is affected by change in topography, chemical heterogeneity, and surface charge. Graphene, which is a single atom thick sheet of graphitic carbon and building block of graphite, is an ideal model material to study this interaction. …
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