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 81 for “"nanosheets"”.
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Mechanical characterization of carbon nanosheets
… to study the mechanical properties of carbon nanosheets. The elastic behavior was investigated by analyzing the pressure-deflection relationship in the bulge test. Youngs moduli of carbon nanosheets as a function of irradiation electron doses can be determined. With an electron dose above 50 …
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Carbon nanosheets and their applications
Carbon nanosheets are a new kind of two-dimensional polymeric material that is fabricated by cross-linking aromatic self-assembled monolayers with electrons. Due to their uniform thickness of only about one nanometer, as well as their high chemical, mechanical, and thermal stability, such materials …
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Metallic MoS2 Nanosheets for Lithium-Sulfur Batteries
… (Li-S) batteries using metallic MoS2 nanosheets as functional host materials. While our prior research established lithiated MoS2 (LixMoS2) as an effective sulfur host for Li-S batteries, two major barriers remain to practical implementation of LixMoS2: incomplete understanding its …
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Charge Transport Physics in Coordination Nanosheets (CONASHs)
… focuses on two exemplary coordination nanosheets, copper-benzenehexathiol (Cu-BHT) and nickel-based benzenehexathiol (Ni-BHT), presenting a detailed exploration of their charge transport properties. A comprehensive temperature-dependent transport study of Cu-BHT shows its remarkable …
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Molecular Self-Assembly of Carbon Nanosheets via AFM Nanoprinting
… for the molecular self-assembly of carbon nanosheets, and subsequently, we explore the design, fabrication, and initial testing protocols of custom 2PP-printed FluidFM cantilevers as an alternative to traditional FluidFM probes for more general AFM nanoprinting applications.
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Hydrothermal stability of hierarchically-structured two-dimensional MFI zeolite nanosheets
… two-dimensional MFI zeolite nanosheets in the structural and catalytic stability investigations explored in this dissertation. The nanostructural evolution of purely-siliceous nanosheets in presence of water under different atmospheres was studied via a thorough structural …
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Bismuth Oxyhalide Nanosheets with Adjustable Band Edge Potentials for Photocatalytic Ammonia Generation
… the third chapter, we fabricated ultrathin BiOI nanosheets by a surfactant-assisted hydrothermal method. Unlike bulk BiOI, ultrathin nanosheets were active for water splitting and nitrogen reduction. It is shown that functional groups (polyvinyl pyrrolidone) on the surface of BiOI induced an …
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Grafting polymers on nanosheets : a route for the fabrication of freestanding polymer brushes
… This new approach offers several advantages: 1. Nanosheets are thermally and mechanically extremely stable. This will make them a good candidate for polymerization at elevated temperatures as well as in intense UV light. 2. EBCL as a patterning tool offers stability, flexibility, selectivity, …
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Two-dimensional clay and graphene nanosheets for polymer nanocomposites and energy storage applications
Clay and graphene nanosheets are attractive to materials scientists due to their unique structural and physical properties and potentially low cost. This thesis focuses on the surface modification and structure design of clay and graphene nanosheets, targeting special requirements in polymer …
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Thermal and photochemical reactions of large metallaborane clusters and functionalizations of boron nitride nanosheets
… and the functionalization of boron nitride nanosheets have been investigated. The nanosheets have potential applications in Dye Sensitized Solar Cells.Chapters 1 and 3 describe the thermal and photochemical pathways for two metalladecaboranes, [nido -6-Mn(CO) <sub>3 </sub>B <sub>9 </sub>H …
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The synthesis, characterization, and application of carborane-cluster based macrocycles and boron nitride nanosheets in photovoltaics
… non-covalent functionalization of boron nitride nanosheets (BNNS) with polythiophene can produce a working photovoltaic device when attached to TiO2 nanoparticles as a semiconductor in a manner similar to a DSSC. This paper explores the characterizations of a new polythiophene-BNNS complex, as …
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Study on graphene-based nanocomposites with special magnetoresistance properties
… process was developed to produce FeCo/rGO hybrid nanosheets with significant MR (21 ± 6%) at the low magnetic field (10 kOe) and room temperature. In addition, we demonstrated that the wireless magnetic field sensing system with FeCo/rGO hybrid nanosheets and ZigBee radio modules was able to …
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Controlled Attachment of Nanoparticles to Layered Oxides
… were fabricated and magnetic NPs modified oxide nanosheets and nanoscrolls were prepared. Both aqueous method and two-phase method were applied to prepare gold NPs onto oxide nanosheets, nanoscrolls and other nanocrystals.</p> <p>The combination of H<sub>4</sub>Nb<sub>6</sub>O<sub>17</sub> …
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Electrochemical Deposition of Copper and Zinc Nanomaterials at Polypyrrole Thin Films
… techniques. These structures were formed of nanosheets made of nanoparticles which combined into flower-like micro-clusters. The nucleation of the structures was progressive. The morphology and composition of the copper-based materials changed with the deposition potential. Microcrystals and …
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Enhancing Self-Healing Properties of Polymeric Nanocomposites through Surface Modification of Van der Waals 2D Materials: Exploring Beyond Graphene
… chain ends is achieved and the resulting nanosheets possess the ability to chemically bond with the polymer matrix and actively participate in the healing chemistry. The thesis begins with a comprehensive review of the state-of-the-art in 2D materials-based self- healing polymeric …
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Rational design and synthesis of zeolite acid catalysts for applications in biomass conversion
… catalyze bulky molecules. A1-containing zeolite nanosheets of single-unit-cell thickness are synthesized using diquarternary ammonium surfactants. Characterization reveals high external surface area and mesoporosity and strong external acid sites. MFI nanosheets have higher stability and …
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Correlation of Photocatalytic Activity with Band Structure of Low-dimensional Semiconductor Nanostructures
… two-dimensional lanthanum titanate (La2Ti2 O7) nanosheets, which are widely studied as an efficient photocatalyst due to the unique layered crystal structure. Nitrogen was doped into the La2Ti2O7 nanosheets and then Pt nanoparticles were loaded onto the La2Ti2O7 nanosheets. Doping nitrogen …
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Improvements to Polyamide Reverse Osmosis Membranes for Removal of Small, Neutral, Hydrophilic Solutes
… which was surface bonding of graphene oxide (GO) nanosheets. On average, membranes modified with GO nanosheets reduced NDMA permeability by 31% when compared to unmodified membranes, increasing average NDMA rejection from 76.5% to 82.7%. Improvement to NDMA rejection came at a 15% loss of water …
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