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 25 for “"carbon material"”.
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Specific and non-specific interactions on carbon material surfaces.
… non-polar fluid phases and surfaces of various carbon materials: Activated Carbon (AC), non-porous Carbon Black (CB) and Multiwall Carbon Nanotubes (MWCNTs)with different surface chemistry have been studied. These are currently of great interest as they govern the interfacial behaviour of …
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Low temperature carbon material deposition with photo-enhanced chemical vapor deposition
… here for low temperature deposition of carbon nanotubes (CNTs) and hexagonal diamond. Most current deposition methods require high substrate temperature. Photo-enhanced CVD utilizes light energy to dissociate carbon containing precursor molecules and hence has a potential for low …
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Thermal Atomic Layer Etching and Vapor Phase Infiltration for Carbon Material Synthesis.
North Carolina State University Theses Chemical Engineering.
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DESIGNING OUT CARBON: MATERIAL SUBSTIUTION STRATEGIES FOR A UNIVERSITY OF OREGON DORMITORY
This thesis examines how material substitution strategies can meaningfully reduce the embodied carbon footprint of university dormitory construction, using Unthank Hall at the University of Oregon as a case study. The primary research question guiding this study is: to what extent can targeted …
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Reaction sintered silicon nitride as a coating for carbon-carbon composites
… (RSSN) was studied as a substitute coating material on the carbon-carbon material (RCC) presently used as a heat shield on the space shuttle, and on advanced carbon-carbon (ACC), a later development. On RCC, RSSN showed potential in a 538°C (1000°F) screening test in which silicon carbide …
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Synthetic industrial diamond : a technological outlook
… temperature (HPHT) processes for crystallising carbon material and (ii) chemical vapour deposition (CVD) of these materials. The substitution of synthetic for natural diamond occurred in a systematic and predictable manner. Further technological advance could threaten the concept of diamond as a …
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Novel carbon materials with hierarchical porosity : templating strategies and advanced characterization
The aim of this work was the generation of carbon materials with high surface area, exhibiting a hierarchical pore system in the macro- and mesorange. Such a pore system facilitates the transport through the material and enhances the interaction with the carbon matrix (macropores are pores with …
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(Bio)Sensores electroquímicos basados en sonogeles modificados con nanomateriales y polímeros para aplicaciones analíticas
… devices based on the modification of the Sonogel-Carbon material with conducting polymers and nanomaterials, as well as on the subsequent application in the analysis of real samples. The preparation of these transducer materials has been optimized. A structural, compositional and superficial …
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FROM ALGAE BLOOMS TO INTERIOR SYSTEMS: SEAWEED-BASED MATERIAL SYSTEMS AND DIGITAL FABRICATION STRATEGIES FOR SUSTAINABLE ARCHITECTURE
This research explores algae-derived materials for carbon-storing interior surfaces through a material-driven design methodology. Waste Cladophora algae, together with oyster shell, alginate, and hemp fibers, are transformed into a biodegradable, low-carbon material. Digital fabrication techniques, …
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Polarization, passivation, intercalation, and generation: an examination of In-Situ and Ex-Situ analytical techniques for the study of carbon anode materials for the electrochemical generation of elemental fluorine.
… and fluorine gas. This work examines various carbon materials for their use as electrodes in the electrochemical generation of elemental fluorine. An experimental apparatus was designed and constructed to melt and maintain the temperature of the KF·2HF electrolyte in a suitable range for …
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Conversion of Switchgrass into Functional Carbon Materials and Food Emulsifiers
… large-volume commodity products, such as hard carbon and natural emulsifier, to increase the economic gain. First, we designed a process to convert switchgrass into hard carbon, a carbon material with disordered structures, and used as an anode material in sodium-ion batteries. The produced …
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Novel Bio-inspired Aquatic Flow Sensors
… in this work are flow sensors fabricated using carbon nanomaterials. These sensors are made by embedding carbon nanotubes (CNT) and carbon nanohorns (CNH) into a polymeric substrate and then tested by flowing a conductive aqueous solution over the surface of the exposed CNT and CNH. In response, …
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Fabrication of graphene-based resistive sensor for eschericia coli bacteria sensing
… the water has been contaminated with the fecal material of human or animals. The risk of health threatening to humans become high when E. coli bacteria are exposed to water, not only causes diarrhea but also lead to death if not treated immediately. Many existing sensors to detect E. coli …
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Nanometer-scale temperature measurements of phase change memory and carbon nanomaterials
… from macroscopic systems as low dimensional materials, grain structure, interfaces, and thermoelectric effects can dominate electronic performance. This work develops and implements an atomic force microscopy (AFM) based nanometer-scale thermometry technique, known as scanning Joule expansion …
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CU-CATALYZED CHEMICAL VAPOUR DEPOSITION OF GRAPHENE: SYNTHESIS, CHARACTERIZATION AND GROWTH KINETICS
Graphene is a two dimensional carbon material whose outstanding properties have been envisaged for a variety of applications. Cu-catalyzed chemical vapour deposition (Cu-CVD) is promising for large scale production of high quality monolayer graphene. But the existing Cu-CVD technology is not ready …
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Microrecycling of Batteries and Carbon-Containing Waste for Manufacturing Different Materials
… graphite has been widely used as the anode material in Li-ion batteries. However, it fails to deliver satisfactory performance in Na-ion batteries. Moreover, the soaring demand for graphite has led to its classification as a critical mineral. Consequently, identifying alternative carbon …
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Parametric Study and Early-Stage Structural Design for Tall Timber Buildings
… greenhouse gas emissions due to the usage of carbon intensive materials such as steel and concrete. An alternative to these materials such as timber, a low embodied carbon material, has been gaining traction in the tall building industry. However, timber structures today have been limited in …
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A study of carbon based materials for energy applications
Carbon based materials such as CNTs and graphene have been widely studied over the last few years. The outstanding electrical and mechanical properties of these materials attracted researchers to find ways to grow and use them in nano-devices. Among the different techniques, PECVD is a relatively …
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Engineering of Microbial Fuel Cells technology: Materials, Modelling and Architecture
… was joined with the study and the synthesis of carbon based aerogels to be used as new electrode materials, both for the anode and the cathode. The aim of the modelling was to understand what happen, from a fluid-dynamic point of view, inside the cell during operation. It was based on the …
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Characterizing transient and seasonal responses of bioreactors for subsurface drains
… In-field bioreactors are trenches filled with carbon material (usually wood chips) which serve as a medium for denitrifying bacteria to grow, thus reducing the amount of nitrate that enters water bodies from tile drains. Bioreactors provide many advantages that make them a strong candidate for …
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