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 320 for “"layer-by-layer"”.
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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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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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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 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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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
… and relatively easy to manufacture at low cost, by plasma enhanced chemical vapor deposition (PECVD), compared to single crystal Si. The crystalline volume fraction of nc-Si films needs to be well controlled to prevent light-induced degradation of the otherwise amorphous hydrogenated Si (a-Si:H). …
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Layer-by-Layer Nanoparticles for Targeted Delivery and Treatment of Ovarian Cancer
… under investigation, efficacy is hampered by nonspecific interactions with healthy tissue and poor pharmacokinetics. Targeted drug delivery carriers can reduce systemic toxicity caused by off-target interactions, increase drug solubility and stability in physiological fluids, and improve …
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Studying and controlling chromophore orientation in polyelectrolyte layer-by-layer thin films
… technique for the polymeric thin films is layer-by-layer (LBL) electrostatic assembly. This technique takes advantage of the electrostatic attraction between oppositely charged polyelectrolytes to assembly films. For example, a polyanion and polycation are dissolved in separate aqueous …
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Layer-by-Layer Single-crystal Two-dimensional Material Growth by Geometric Confinement
… them from their commercialization: 1) precise layer control during their growth, 2) maintaining single crystallinity at wafer-scale, and 3) inevitable transfer-process to fabricate heterostructure for various next-generation applications such as spintronics, valleytronics, and optoelectronics. …
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Engineering the electrochromism and ion conduction of layer-by-layer assembled films
This work applies the processing technique of layer-by-layer (LBL) assembly to the creation and development of new electrochemically active materials. Elements of the thin-film electrochromic cell were chosen as a particular focus for LBL fabrication. Layer-by-layer assembly is the ideal processing …
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Applications of Layer-by-Layer Films in Electrochromic Devices and Bending Actuators
… contrast performance of electrochromic devices. Layer-by-Layer (LbL) assembly was used to deposit thin electrochromic films of materials ranging from organic, inorganic, conducting polymers, etc. The focus was on developing new materials with high contrast and long lifecycles. A detailed …
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Investigating the Modification of Spontaneous Emission using Layer-by-Layer Self-Assembly
… emission can be dramatically modified by optical micro- and nanostructures. We studied the modification of fluorescence dynamics using a polymer spacer layer fabricated through layer-by-layer (LbL) self-assembly. The advantages of this method are numerous: The self-assembled spacers can …
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