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 200 for “"Nanofibers"”.
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Genipin-crosslinked electrospun collagen nanofibers
… In this research collagen type I nanofibers were fabricated using electrospinning. Collagen nanofibers were unstable in aqueous environments, and thus crosslinking was required. Glutaraldehyde, which is cytotoxic to cells, is currently the chemical crosslinking agent used by most …
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Field ionization from carbon nanofibers
The Micro Gas Analyzer project aims to develop power-efficient, high resolution, high sensitivity, portable and real-time gas sensors. We developed a field ionizer array based on gated CNTs. Arrays of CNTs are used because of their small tip radii and high aspect ratio which yields high electric …
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Electrospun nanofibers with tunable electrical conductivity
Electrospinning is a convenient method to produce nanofibers with controlled diameters on the order of tens to hundreds of nanometers. The resulting nonwoven fiber mats are lightweight, highly porous, and have high specific surface areas around 1 to 100 m2/g. Combined with the high electrical …
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Glucose Biosensor Using Electrospun Mn2O3-Ag Nanofibers
… highly porous Mn<sub>2</sub>O<sub>3</sub>-Ag nanofibers were fabricated by a facile two-step procedure (electrospinning and calcination) and then employed as the immobilization matrix for glucose oxidase (GOD) to construct an amperometric glucose biosensor. A notable enhancement of direct …
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Electrospun nanofibers : opportunities in environment and energy
… one-dimensional nanostructures in the form of nanofibers. It has recently been successfully used to produce semiconducting metal oxide nanofibers which have been used in chemiresistive gas sensors and dye-sensitized solar cells. Electrospun gas sensors and solar cells have already been shown to …
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Supramolecular Nanofibers - Preparation, Structure-Property Relations, and Applications
Conventional polymer nanofibers have gained tremendous interest in the last years in the fields of catalysis as templates, in medicine as tissue engineering, in functional textiles as protective suits, and especially in air filtration as filter media. Generally, nanofibers are prepared by top-down …
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High strength carbon nanofibers derived from electrospun polyacrylonitrile
Carbon nanofibers (CNFs) derived from polyacrylonitrile (PAN) have not yet demonstrated the high tensile strength and Young’s modulus of their microscale counterparts. This is due to the current lack of understanding of the effect of electrospinning conditions on the quality of PAN precursor …
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Formation of polymer nanofibers from electrified fluid jets
The formation of polymer nanofibers from fluid jets in· an electric field, also referred to as electrospinning, has been studied. Controlling the fiber properties requires a detailed understanding of how a millimeter-diameter fluid jet emanating from a nozzle is transformed into solid fibers that …
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Multiscale modeling and analysis of nanofibers and nonwoven materials
… which is a technique for the production of nanofibers with diameters down to the range of a few nanometers. The nonwoven structure has unique features, including interconnected pores and a very large surface to volume ratio, which enable such nonwoven materials to have many applications. The …
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Hierarchical Assembly of Polymeric Nanofibers for Advanced Material Applications
Polymer nanofibers are gaining importance due to their wide applicability in diverse fields, such as tissue engineering, fuel cells, photonics and sensors. For these applications, manufacturing aligned polymer nanofibers with precisely controlled morphology and well characterized mechanical …
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Deposition of Electroactive Polymers onto Polymer Nanofibers for Nerve Regeneration
… (PCL) is used to produce porous and ordered nanofibers that resemble the structure and organization of the extracellular matrix, providing a suitable environment to promote the adhesion and directional growth of nerves. These oriented nanofibers are conformally coated with the inherently …
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STRUCTURE AND PROPERTIES OF PIEZOELECTRIC NANOFIBERS FOR ELECTROMECHANICAL COUPLING APPLICATIONS
… piezoelectric polymer and lead-free ceramic nanofibers for electromechanical coupling applications. Polyvinylidene fluoride (PVDF) nanofibers were fabricated by electrospinning process using a precursor solution modified with hydrated salt. Introducing hydrated salts in PVDF precursor …
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Mechanical and interfacial properties of carbon nanofibers for polymer nanocomposites
… and failure response of vapor grown carbon nanofibers (VGCNFs) has been unexplored despite the large volume of carbon nanofiber composites fabricated today. Three grades of VGCNFs, namely as-fabricated, high temperature heat treated, and graphitized/surface oxidized, with average diameters …
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Self-Assembling Peptide Nanofibers RADA16 and IEIK13 for Rapid Hemostasis
… and bioabsorbable. Self-assembling peptide nanofibers RADA16 and IEIK13 provide a unique possibility to create a hemostat that meets all of these criteria. These short peptides self-assemble into nanofibers that entangle and gel in solution. Through the use of layer-by-layer (LbL) we can …
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High Performance Electrode Materials From Carbon Nanofibers with Tunable Pore Architectures
… to obtain polymer fibers to yield carbon nanofibers (CNFs) upon pyrolysis. The effect of in-situ porogen was analyzed and utilized for preparation of high surface area CNFs. PI with the best performance (6FDA-DABA) was blended with polyacrylonitrile (PAN) and the electrochemical …
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Removal of uranium from aqueous wastes using electrically charged carbon nanofibers
… other methods. The technique utilizes carbon nanofibers as electrodes which successfully electrosorb uranium ions. Fibers with varying surface characteristics were evaluated in the removal process and all were determined to be equally and extremely effective. Various experimental parameters …
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