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 “"covalent functionalization"”.
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Polymer and covalent functionalization of single walled carbon nanotubes for electronic sensor applications
… n-type single walled carbon nanotubes through covalent side wall functionalization were explored. Chapter 1: Chemiresistive sensors are becoming increasingly important as they offer an inexpensive option to conventional analytical instrumentation, they can be readily integrated into electronic …
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Using Covalent and Non-Covalent Chemistry to Control Properties of Single -Walled Carbon Nanotubes
… mobility control is demonstrated via covalent functionalization with 4-hydroxybenzene diazonium and non-covalent functionalization with sodium cholate surfactant. Solution-phase solubility without surfactants can be achieved using high levels of covalent functionalization with aryl …
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Temperature effects on the electronic conductivity of single-walled carbon nanotubes
… pristine; functionalized with a nitrobenzene covalent functionalization, which are expected to display poor electronic conductivity; and functionalized with a carbene covalent functionalization, which are expected to display pristine-like conductivity. Measurements were taken via four-point …
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The synthesis, characterization, and application of carborane-cluster based macrocycles and boron nitride nanosheets in photovoltaics
… nitride (h-BN) have shown</p> <p>successful covalent and non-covalent functionalization of these nanostructures. Furthermore, experiments have also shown that the non-covalent functionalization of boron nitride nanosheets (BNNS) with polythiophene can produce a working photovoltaic device …
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Photochemical Tailoring of Single-Wall Carbon Nanotubes by Photoexcited Sodium Hypochlorite
… One way to accomplish this is through the covalent functionalization of SWCNTs. Since the first SWCNT covalent functionalization that maintained NIR SWCNT emissions was reported in 2010, active research has continued on new approaches to obtain more efficient and controlled …
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Graphene at interfaces
… under electrochemical reducing conditions. The covalent functionalization of graphene successfully provided the appropriate chemical activity/reactivity for the desired applications. Through the reactivity of functional graphene, we developed the fluid-like graphene matrix to attain a …
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Development Of Single And Array Electro-Chemical Sensors For Real-Time Trace Metal Analysis In Aqueous Environmental Media
… <p>Analytical selectivity was improved via covalent functionalization on CFMs. We employed diazonium electrochemical reduction followed by click chemistry to create robust covalent attachments. We showcased its application through grafting Cu(II) ionophores onto CFMs. The selectivity was …
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Peptide-Functionalized Layer-by-Layer Nanoparticles Demonstrate Improved Blood Brain Barrier Permeability for Glioblastoma Treatment
… that electrostatic absorption (as opposed to covalent functionalization) is a quick and effective method for attaching cationic, tumor-penetrating peptides to anionic nanoparticles synthesized through an iterative layer-by-layer (LbL) approach. Here, I demonstrate that LbL nanoparticles …
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Investigations on Nanomaterials For Potential Biomedical Applications
… and biocompatibility. Therefore we also studied covalent functionalization of carbon nanotubes as part of the enhancement of their solubility and simultaneous characterization of several parameters owing to improvement of their bio-compatibility. In summary we have applied aligned ZnO nanorods, …
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Experimental Analysis of Heat Generation in Carbon
… purpose of this research is to study a novel non-covalent functionalization technique of single-walled carbon nanotubes (SWCNTs) and to examine the feasibility of using carbon nanotube films as thin film heaters. We developed a unique methodology to synthesize a well dispersed, environmentally …
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Hierarchical carbon fiber composites with radially aligned carbon nanotubes : preservation of in-plane tensile properties
… plies with preserved tensile properties: Non-covalent functionalization of the CF surface coupled with a low temperature thermal chemical vapor deposition process enable high density catalyst adhesion and CNT growth below critical temperatures that would result in fiber strength loss. …
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Aggregation Behavior of Chiral Single-Walled Carbon Nanotubes and their Transport in Landfill Conditions
… conditions. This study involves four key tasks: functionalization of chirally separated SWNTs, aggregation kinetics of covalently and non-covalently functionalized SWNTs, aggregate structure determination, and transport behavior in conditions relevant to landfills. SWNTs with (6,5) SG65 and (7,6) …
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Synthesis and chemical modification of carbon nanostructures for materials applications
… plane and higher aspect ratio. Two different covalent functionalization methods for GNRs based on diazonium chemistry were developed. The resulting functionalized GNRs (f-GNRs) are readily soluble in organic solvents which increase their solution processability. The f-GNRs were also found to …
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Electronic structure and quantum conductance of molecular and nano electronics
… a larger scale, we study the effect of chemical functionalizations to the transport properties of carbon nanotubes. We propose several covalent functionalization schemes for carbon nanotubes which display switchable on/off conductance in metallic tubes. The switching action is achieved by …
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Computational Analysis of Elastic Moduli of Covalently Functionalized Carbon Nanomaterials, Infinitesimal Elastostatic Deformations of Doubly Curved Laminated Shells, and Curing of Laminates
… binding is to functionalize SWCNTs and SLGSs by covalent attachment of appropriate chemical groups. However, this damages their pristine structures that may degrade their mechanical properties. Here, we delineate using molecular mechanics simulations effects of covalent functionalization on …
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Functionalization of Metal Oxide Surfaces through Chemical Reactions and Physical Adsorption
… adsorption, and materials chemistry. The functionalization of a material’s surface can dramatically change its physical and chemical properties. The research described herein is built on the foundation of traditional techniques used for synthesis, characterization, and functionalization of …
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Functional surface chemistry of carbon-based nanostructures
… carbon nantoubes (SWNTs) upon sidewall covalent bond formation. It is observed that the initial degree of disorder has a strong influence on covalent sidewall functionalization which has implications on developing electronically selective covalent chemistries and assessing their …
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Synthesis and Properties of Ion-Containing Block and Segmented Copolymers and Their Composites
… characterization demonstrated successful covalent functionalization and formation of surface-bound ammonium salts. Upon comparison with pristine MWCNTs, ammonium-functionalized MWCNTs exhibited significantly enhanced dispersibility in both DMF and sulfonated polyurethane matrices due to …
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Dynamic supramolecular hydrogels with adaptive biological functionality
… nanostructures, robust routes for their surface functionalization, that ideally do not interfere with their self-assembly properties, are required. Many existing methods rely on covalent functionalization, where building blocks are appended with functional groups, either pre- or post-assembly. In …
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