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 18 of 18 for “"Surface Ligands"”.
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Studies of the role of ligands in determining the structures of polynuclear metal compounds
… out to investigate to what extent the attached surface ligands govern the structure in the solid state and how this relates to the chemistry of the cluster in solution.
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Development of N-heterocyclic carbene ligands for nanomaterials in aqueous media and expanding the interface of metal-organic framework (MOF) and polymer chemistry via polyMOFs
… This thesis focuses on expansion of the types of ligands available for (1) metallic nanomaterial surface modification and (2) metal-ligand driven supramolecular assembly. (1) Surface ligands are typically used for surface passivation, imparting new properties such as solubility, or introducing a …
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Nanomaterials from Nanocomponents: Synthesis and Properties of Hybrid Nanomaterials
… following the removal of the nanoparticle surface ligands and replacement with pyridine. The resulting hybrids are thermally stable up to 350ºC and mechanically stable against sonication. The photoluminescence Stokes shift in the bound nanoparticles is shown to be reduced relative to that …
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Role of c-Cbl in Invasion of Mammalian Cells by Rickettsia Conorii
… cell receptor that binds to rOmpB, an R. conorii surface ligand. The engagement of Ku70 by rOmpB leads to a rapid ubiquitination of Ku70 by c-Cbl, followed by the entry of R. conorii into the host cell. However, the role of c-Cbl in ubiquitinating Ku70 and communicating with the invading bacterium …
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Increasing the optical transparency of a living mouse brain (and other nanotechnologies)
… of a variety of materials with tailored surface ligands, using common benchtop equipment. This method may be useful for developing nanoparticles with better biosafety, efficacy and performance. (2) A method for the delivery of hydrophobic NVNDs to neural cell membranes using PEG-ylated …
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Development of fluorescent semi-conductor nanocrystal conjugates for in vitro and in vivo imaging applications
… However, unlike other imaging probes, the surface ligands determine the solubility, stability, quantum yield (QY), biocompatibility, and derivatizability of QDs. Therefore, to use QDs for in vitro and in vivo imaging, QD ligands need to be elaborately engineered for each experiment. Single …
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Design and synthesis of biocompatible fluorescent semi-conductor nanocrystals for in-vivo and in-vitro imaging/sensing applications
… their solution properties via the tunability of surface ligands. The primary focus of this thesis is the design and synthesis of new ligand coatings to render QDs water soluble, pushing the boundaries of QD applications in biology both in-vivo and in-vitro. On the in-vivo front, ultrasmall QDs …
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Synthetic Design of Optical Emitters
… describe the development of a versatile class of surface ligands for lead halide perovskite (LHP) QDs of CsPbBr3. CsPbBr3 QDs have seen tremendous development in recent years, positing them as candidate emitters for quantum optical applications. Carefully constructing binding groups and backbones …
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Detailed analysis of ligands on gold nanoparticles
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms
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Electronic Structure Based Investigations of Hybrid Perovskites and Their Nanostructures
… 3) for perovskite nano-crystals with chiral surface ligands, simulations by the author helped to attribute the chirality transfer between organic cations and inorganic substrate to the geometric distortions driven by hydrogen bonds. Third, the author investigated 2D hybrid perovskites …
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Controlling nanomaterial self-assembly for next generation optoelectronic applications
… can be produced with a wide variety of surface ligands of differing lengths, either directly from a colloidal suspension or post-deposition and we thoroughly characterize the interparticle spacing as a function of ligand species. Next, we demonstrate an in situ X-ray scattering technique …
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Development of polymer-coated nanoparticle imaging agents for diagnostic applications
… environments because of their coatings and surface chemistry. In this work, we describe the design and development of polymer-coated nanoparticle imaging agents for use in blood, cell and tissue diagnostic applications. Low-molecular weight, amphiphilic polymers capable of noncovalent …
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Theoretical investigation of the quantum-confined Stark effect
… wave function. The presence of charged ligands also influenced the optical properties of quantum dot and this effect is known as the ligand-induced quantum-confined Stark effect. In this dissertation, the effect of pH on the optical properties of functionalized quantum dots were …
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Toward efficient and stable quantum dot solar cells : design and characterization
… also been elucidated. Owing to the versatile surface chemistry and high surface-to-volume ratio of QDs, the surface ligands play crucial roles in determining the optoelectronic properties. In this work, taking advantage of tunable electronic energy levels in QDs with different ligands, a new …
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Exploring excitations and vibrations in semiconductor nanocrystals through fluorescence and Raman spectroscopy
… processes. Chapter 4 demonstrates that surface chemistry can be used to manipulate the low-frequency acoustic vibrations of CdSe QDs, and shows in particular that surface-bound ligands modify the resonant vibrational frequencies of the core. This effect is more pronounced for smaller …
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Water oxidation catalysis beginning with cobalt polyoxometalates: determining the dominant catalyst under electrocatalytic conditions and investigation of the surface properties of Co3O4 nanoparticles
… WOCatalysis. In this chapter, the synthesis, and surface properties of Co3O4 nanoparticles are investigated. It is demonstrated that ethanol/water (EtOH/water) as solvent forms phase-pure Co3O4 nanoparticles but following the same procedure in water yields a mixture of products. Therefore, EtOH …
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Studies at the nanoparticle-biomolecular interface and beyond
… excellent optoelectronic properties and ease of surface functionalization. However, while Au NPs are positioned to revolutionize nanotechnology based biomedical applications, our fundamental understanding at the nanoparticle-biomolecular interface and its resultant impact on cells is still …
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Characterization of semiconductor nanocrystals using advanced solid-state NMR spectroscopy
… synthesis of semiconductor nanomaterials over surface ligands, composition, size, and morphology, as well as integrated them into devices. However, to rational design semiconductor nanomaterials, which advances the science and applications of nanomaterials, analytical techniques capable of …