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 17 of 17 for “"graphene membrane"”.
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PVDF-graphene conductive composite membrane and PVA-graphene conductive composite membrane preparation and application
Graphene has a great potential to revolutionize many fields because of its perfect electrical conductivity. Therefore, it is considered a possible material for the preparation of conductive membrane. In this research, polyvinylidene fluoride (PVDF) and polyvinyl alcohol (PVA) were used together …
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Computational study of graphene nanopore sensor for DNA sensing
… the eld of modern medicine. The thickness of the membranes employed in nanopore-based sensors presents a fundamental limitation to the physical dimension, of the translocating DNA molecule, that can be resolved. Typical solid-state membranes are too thick and usually fail to recognize single …
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Structure, property and transport mechanism of water and electrolytes in graphene nanopores
… to intense research in the area of nanoporous membranes. Owing to its ultrathin thickness, graphene nanopores are promising candidates for various applications such as water desalination, single molecule sensing, etc. Understanding water and ion transport mechanisms and properties in membranes …
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Nanoporous monolayer graphene membranes for water purification : from concept to realization
Graphene, a single sheet of carbon atoms, may provide the foundation for a new class of highly permeable membranes for water purification and desalination. Though atomically thin, graphene exhibits both exceptional mechanical strength and imperviousness to atoms as small as helium. High-density, …
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Transport of n-alkanes through graphene nanoporous atomically thin membrane
… transport through a nanoporous atomically thin graphene membrane is important in determining potential for graphene's application as a filter. Amongst many factors that affect the transport, the effect of size of molecules is analyzed in this paper. Diffusion of n-alkanes between C10 and C18 was …
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Development of experimental methods to measure osmosis-driven water flux and molecular transport across nanoporous graphene membranes
Graphene, an atomically thin planar lattice of sp2 bonded carbon atoms with high strength and impermeability, has drawn attention as a promising next generation high flux separation membrane. Molecular dynamics simulations predicted graphene's potential for exhibiting both high flux and selectivity …
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Nanoporous dialysis membrane for microfluidic neural probes
… where molecules transport through the dialysis membrane on the neural probe. The thesis focuses on the fabrication, transfer, and characterization of two potential candidates, nanoporous graphene membrane and nanoporous silicon membrane, for the dialysis membrane in a neural probe. For both …
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Nanoporous graphene as a water desalination membrane
… of this century, a step-change is needed in RO membrane technology. Thanks to significant advances in the field of computational materials science in the past decade, it is becoming possible to develop a new generation of RO membranes. In this thesis, we explore how computational approaches can …
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Design of surface and bulk interactions: A computational approach to sustainable energy
… distillation to ones that use lesser energy like membrane-based technology. The first part of the thesis looks at the specific case of air or O₂/N₂ separation. Using a classical molecular dynamics (MD) framework to model gas permeation across a nanoporous graphene membrane temple, we observed …
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Selective gas adsorption of gas-water mixtures in nanoscale systems and its application to gas separation
… and surfaces, we use carbon nanotubes (CNTs) and graphene because the remarkably smooth structures of CNT and graphene make them promising materials for various applications relying on fast transport of water and gases. We first study about various gas-water mixtures, such as CO2-water, O2-water …
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Development of macroscopic nanoporous graphene membranes for gas separation
… For such applications, gas separation membranes are attractive because they offer relatively low energy costs but can be limited by low flow rates and low selectivities. Nanoporous graphene membranes have the potential to exceed the permeance and selectivity limits of existing gas …
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TWO-DIMENSIONAL CRYSTALS ON SUBSTRATES: MORPHOLOGY AND CHEMICAL REACTIVITY
Two-dimensional crystals such as graphene and transition metal dichalcogenides have emerged as a new class of materials. They serve as rich playgrounds for two-dimensional physics but also have great potential for a wide range of applications due to their exceptional tunability via external …
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Biomolecular transport at and through two-dimensional materials
… nanoscale manipulation and molecular detection. Graphene is one such 2D material whose single-atom thickness and high in-plane electrical conductivity enables potential nanopore sensing applications for controllable nanofluidics and nanopore sensing applications conducive towards biomolecule …
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Transport of molecules through and on carbon nanostructures
Single-layer graphene membranes and other 2D membranes can realize very high gas permeation fluxes due to their atomic or unit cell thickness. Established modeling approaches for membrane transport consider transport through a finite and continuum thickness, and therefore they do not apply to the …
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Ion transport across individual sub-continuum graphene nanopores : phenomenology, theory, and implications for industrial separations
Atomically thin materials, and in particular graphene, provide a new class of solid-state nanopores - apertures that allow for the exchange of matter across thin membranes - with the smallest possible volumes of any ion channel. As the diameter of these nanopores becomes comparable to that of …
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Graphene supported hafnium oxide nanopores for DNA sensing
… transistors for localized detection, ultra-thin membrane fabrication using graphene, and the exploration of alternative nanopore materials for biosensing applications. In this work, the development of a new solid-state nanopore sensor consisting of hafnium oxide suspended by functionalized …
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Crumpled Graphene Oxide: Aerosol Synthesis and Environmental Applications
… and engineering. In particular, two-dimensional graphene oxide (GO), has demonstrated considerable potential for advancing and even revolutionizing some of these technologies, such as engineered photocatalysts and membranes. To realize such potential, an industrially scalable process is needed to …