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 26 for “"Thermal Drawing"”.
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Development of neural probes using thermal drawing
… invasive neural probes were fabricated using a thermal drawing process, with polymers serving as their main structural constituent. Through the use of different polymers, probes containing arrays of tin electrodes as small as 5 [mu]m were fabricated, as were probes combining capabilities for …
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Engineering Biomedical and Bioinspired Fiber Devices via Thermal Drawing
… One of the fiber fabrication methods, thermal drawing process, has a unique strength on a scalable production of multimaterial fibers. Based on various properties of multiple materials in a single fiber, multifunctional fibers have been studied for diverse applications such as sensing, …
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Multifunctional Multimaterial Fibers for Sensing and Modulation in Wearable and Biomedical Applications
… structures and multiple functionalities. The thermal drawing technique has emerged as a promising method for fabricating such fiber devices. It allows for the integration of multiple materials and intricate microstructures, thereby expanding the functionality and applications of the devices. …
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Multifunctional Polymer Fiber Probes for Biomedical Application
… (additive manufacturing), laser machining, thermal drawing, and electrospinning. The choice of fabrication methods heavily depends on the materials, geometry, and functionalities of biomedical devices. Currently, the thermal drawing process has proven to be an excellent scalable fabrication …
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Multimaterial rectifying device fibers
… thought to be incompatible with much simpler thermal drawing techniques used in optical fiber production. The incorporation of metals, polymer insulators, and chalcogenide semiconductors into structured fibers has reversed this paradigm and made it possible to realize optoelectronic device …
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In-fiber semiconductor filament arrays
… up into filament arrays during optical-fiber thermal drawing. This structural evolution occurs exclusively in the cross-sectional plane, while the uniformity along the axial direction remains intact. We demonstrate crystalline semiconductor nanowires by post-drawing annealing procedure and …
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From elastic electrodes to fabric systems
… functions within a single fiber. Harnessing thermal drawing, significant developments in fiber functionality have been achieved over the last couple of decades. However, certain essential properties of device containing fibers still require attention. In particular, yarns in an electronic …
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Multi-Material Fiber Fabrication and Applications in Distributed Sensing
… and wearable sensors. By adopting the fiber thermal drawing technique, we have designed and fabricated multi-material electrode-embedded polymer fibers with distributed sensing capabilities. Polymers sensitive to temperature and pressure have been incorporated into the fiber structure, and …
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Phase separation in thermally-drawn fibers: From porous domains to structured Si-Ge spheres
The preform-to-fiber thermal drawing method is a versatile process that allows the fabrication of polymer or glass-based fibers with complex multimaterial internal structures, which grant them functions ranging from optical transmission to chemical detection. However, while a wide range of …
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Fiber inspired neural probes
… disorders. In this thesis, I employed a two-step thermal drawing process (TDP), widely used in fabrication of optical fibers, to create arrays of metal microelectrodes embedded in a polymer cladding. The pitch and size of the electrodes were determined on the macroscale and preserved during the …
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Drawn Polymer Fiber Recuperative Heat Exchangers
… These heat exchangers are manufactured using a thermal drawing process where a bulk polymer preform is heated and stretched. The process results in channels with a characteristic dimension of 50-100 µm and with an overall length of many meters. The drawn heat exchangers are lightweight, …
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From self-assembly to communications via machine washable fibers
… Rather than addressing all the challenges of thermal drawing, we have developed a method to directly integrate commercial functional devices (light emitting diodes, photodetectors etc.) into fibers through thermal drawing. We package these devices internal to the fibers in high density and …
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Materials selection and processing for reliable neural interfaces
… sufficiently carry out these functions. Using a thermal drawing process (TDP), multimaterial fibers comprised of polymer-metal composites can be fabricated to create flexible, microelectrode arrays. These fibers can be further processed after the TDP, using selective etching to reduce the …
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Towards a lithium-ion fiber battery
… flexible power sources, achieved through fiber thermal drawing. This architecture is based on the key-finding of using thermally induced phase separation as a method to introduce porous structures inside thermally drawn fibers for the very first time. This new versatile process allows us to …
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Tunable micro-cavities in photonic band-gap yarns and optical fibers
… Fabrication of these composite fibers by thermal drawing of a macroscopic preform in the viscous state requires solving material selection challenges in order to identify pairs of materials with high refractive index contrast and similar thermo-mechanical properties. Operational …
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Manipulating fluids and fields In multimaterial fibers
… fluids. The emergence of multimaterial thermal drawing as a method to fabricate fibers with precise spatial control of a broad range of materials, such as polymers and metals, enables the integration of new functionalities into these traditionally single material tools. In this thesis we …
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Characterization and connectorization of optoelectronic neural probes
… of polymer-based probes produced through thermal drawing process. Our results indicate that polymer-based fiber-probes maintain low-loss optical transmission even in the presence of 90-270* bending deformation with radii of curvature as low as 500 pim over multiple deformation cycles. …
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Thermally Drawn Piezoelectric Fibers Impart Acoustic Functionality to Fabrics
… as fibers are the building blocks of fabrics. Thermal drawing allows for the scalable production of multimaterial fibers with complex architectures, providing functionality. The processing methods are investigated in detail to reliably create fibers with high piezoelectric performance. The …
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Wearable Power Sources and Self-powered Sensors Based on the Triboelectric Nanogenerators
… adopted two approaches for TENG fabrication: the thermal drawing method (TDP) and 3D printing. With TDP, we have fabricated scalable fiber-based triboelectric nanogenerators (FTENG), which have been woven into textiles by an industrial loom for wearable use. This fabrication process can supply …
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Multifunctional fiber-based neural interfaces
… modalities within a single platform using thermal drawing process (TDP). All-polymer or hydrogel integrated probes with optical, electrical, and fluidic capabilities were developed all within the 100-200 [mu]m diameter, which allowed one-step surgery to the mouse brain and spinal cord for …
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