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 11642 for “"layer"”.
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Physical layer-aware wireless link layer protocols
… about the wireless channel at the link layer. This dissertation makes two contributions: (i) a redesign of the interface between the physical and link layers in wireless networks to expose more information about the wireless channel to the link layer, and (ii) the design and evaluation …
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Layer-by-layer assembly in confined geometries
The fundamental nature of layer-by-layer (LbL) assembly in confined geometries was investigated for a number of different chemical systems. The first part of this thesis concerns the modification of microfluidic and nanofluidic devices which hold great potential as a platform for manipulation and …
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Layer-by-Layer Nanoparticles for Cytokine Delivery
… nanoparticles (NPs) which, when modulated via layer-by-layer (LbL) assembly, can provide many of the desirable characteristics of cytokine-delivery vehicles including tumor cell targeting, subcellular localization, and improved pharmacokinetics. In this thesis, we address some aspects of NPs …
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Engineering electroresponsive layer-by-layer thin films
Electroresponsive layer-by-layer (LbL) polymer films and polymer nanocomposite films were investigated as model systems for electrically triggered drug delivery applications and "mechanomutable" surface coating applications. Two strategies were implemented in the design of these electroresponsive …
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Layer-by-Layer Systems for Craniomaxillofacial Bone Repair
… that can potentially meet this challenge is layer-by-layer (LBL) self-assembly, which can be used to coat defect-relevant implants with nanoscale thickness films that elute growth factors with tunable release kinetics and dose. In this work, we first developed LBL film architectures deliver …
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Layer-by-layer coated microneedles for cancer immunotherapy
… The drug was incorporated as a releasable multilayer coating on the microneedle surface constructed with alternating absorption of oppositely charged species including protein or nucleic acid drugs and biocompatible polymer carriers, forming a 'sticky' layer-by-layer (LbL) film through …
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Engineering the microfabrication of layer-by-layer polyelectrolyte assembly
… of microstructuring polyelectrolyte multilayers has been established by using the layer-by-layer assembly technique in combination with patterned self-assembled monolayers (SAMs). SAMs of a carboxylic acid surface (COOH) and a triethylene glycol surface (EG) were used to promote and resist …
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Ion transport and structure of layer-by-layer assemblies
Layer-by-layer (LbL) films of various architectures were examined as potential solid state electrolytes for electrochemical systems (e.g. batteries and fuel cells). The relationship between materials properties and ion transport within LbL films was investigated in three systems, described below. …
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Layer-layer interactions in atmospheric, cryospheric, and stellar dynamics
Layer-layer interactions comprise some key scientific unknowns and uncertainties in regional and large-scale planetary climate models. My dissertation studies their behaviour with an aim to develop explanations for and improve representations of observed phenomena. I focus on three different …
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Cellulose rich Composite materials from layer by layer coated fibers
L'abstract è presente nell'allegato / the abstract is in the attachment
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Consistent community detection in uni-layer and multi-layer networks
… in many modern applications are often multi-layered in the sense that they consist of multiple types of edges/relations among a group of entities. Each of those different types of relations can be viewed as creating its own network, called a layer of the multi-layer network. Multi-layer …
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Layer-by-layer assembly of conducting membranes for photoelectrochemical cells
Spray-assisted layer-by-layer (Spray-LbL) assembly is used to achieve vertical transfer of silicon microwire arrays into an ion-conducting, ultrathin polymer membrane. The choice of LbL platform and the properties of the silicon surface control the film morphology, generating either a conformal …
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Layer-to-Layer Feedback Control for Direct Energy Deposition Additive Manufacturing
… desired toolpath and parts are constructed in a layer-by-layer fashion. Several process inputs determine the deposition quality, including powder feed rate, laser power and nozzle speed. These inputs, as well as the environmental conditions, are subject to random fluctuations that can cause …
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Layer by Layer, Nano-particle "Only" Surface Modification of Filtration Membranes
Layer by Layer (LbL) deposition using primarily inorganic silica nanoparticles is employed for the modification of polymeric micro and ultrafiltration (MF/UF) membranes to produce thin film composites (TFC) with potential nanofiltration (NF) and reverse osmosis (RO) capabilities.. A variety of …
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Layer to layer registration of a slurry-based 3D printing machine
… This technology deposits an unprinted wet slurry layer by rapidly depositing overlapping parallel lines of slurry to form each layer. Line registration may affect the final properties of the part and it is therefore desirable to control the registration of slurry lines within each layer and from …
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Multi-component protein films by layer-by-layer : assembly and electron transfer
… on heterogeneous electron transfer of monolayers of this protein on gold. An important advance was the fabrication of cyt.c multilayers by electrostatic layer-by-layer self-assembly. The ease of fabrication, the stability, and the controllable permeability of polyelectrolyte multilayers …
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Fabrication of ceramic layer-by-layer infrared wavelength photonic band gap crystals
… to explore techniques for fabricating 3D ceramic layer-by-layer (LBL) photonic crystals operating in the infrared frequency range, and to characterize the infilling materials properties that affect the fabrication process as well as the structural and optical properties of the crystals. While …
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Plasma Enhanced Layer-by-layer Deposition and Nano-crystallization of Si:H films
… otherwise amorphous hydrogenated Si (a-Si:H). A layer-by-layer technique using two separate plasma sources for a-Si:H deposition and nano-crystallization was developed. A capacitively-coupled plasma (CCP) with SiH4/He feed gas was used to deposit thin a-Si:H layers that were subsequently exposed …
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Unified cross-layer framework: a generic platform for cross-layer design experimentation
Cross-layer designs in wireless network systems have been an active research area. Numerous cross-layer schemes are proposed to improve overall system performance by allowing information to be shared and controlled across protocol layers. However, much of the previous research work in this area is …
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