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 11 of 11 for “"Colloidal Behavior"”.
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Anisotropic and tunable characteristics of the colloidal behavior of metal oxide surfaces
The electroosmotic behavior of the rutile polymorph of titanium dioxide was explored as a function of crystallographic orientation. Atomic force microscopy (AFM) was employed to make high-resolution force spectroscopy measurements between a silica sphere attached to a traditional, contact-mode AFM …
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Formation of uniform particles: Morphology and colloidal stability, and stable particle growth during precipitation from titanium alkoxides
… of shear and the mechanisms of growth of colloidally stable suspensions are discussed. Two factors are identified which control colloidal stability and precipitate morphology during precipitation: interaction potentials of the precipitates and the nature of depositing species. A short …
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Stability and precipitation of diverse nanoparticles
… and bioavailability in aquatic environments. The colloidal behavior of organic dispersed CNTs and water dispersed DNDs is investigated. The aggregation behavior of these two colloidal systems is quite different from that of hydrophilic, water soluble functional ized CNTs (F-CNTs). The values of …
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Study of Semiconducting Nanomaterials: Photoelectrochemistry and Dynamic Light Scattering
… nanoparticles (NPs). A detailed study of NP colloidal behavior has been described with respect to dynamic light scattering (DLS) measurements. In our system, we studied electron transfer across the semiconductor (SC) electrode and electrolyte interface. The application of ZnO and TiO2 …
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Implications of Nanofiber Length and Polydispersity on Flow Alignment
… comprehensive insight into their colloidal behavior, shear response, and alignment mechanisms remain limited. Additionally, few experimental techniques can probe nanoscale orientation under dynamic conditions, making it difficult to correlate rheological properties with …
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The role of soil clays and clay-humic complexes in processes controlling colloidal stability and the sorption and degradation of tetracyclines
… used to explain dispersion and flocculation in colloidal systems, however little is known about the effect of crystalline swelling on colloidal behavior. The first topic addressed in the dissertation is the effect of monovalent and divalent cations on crystalline swelling and the breakup and …
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Atomic Force Microscopy Study of Clay Mineral Dissolution
… dissolution have been affected by the colloidal behavior of the mineral particles. Finally, the dissolution behavior of hectorite (a trioctahedral smectite) and nontronite ( a dioctahedral smectite) were compared. Based on the differential reactivity of their crystal faces, a model of …
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Implications of Shape Factors on Fate, Uptake, and Nanotoxicity of Gold Nanomaterials
… [LSPR]) that originate from the collective behavior of their surface electrons. These nanoparticles are commonly developed and used for biomedical and industrial application. A recent report has predicted that the global market for gold nanoparticles will be over 12.7 tons by year 2020. …
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Crumpled Graphene Oxide: Aerosol Synthesis and Environmental Applications
… to new knowledge of material properties, behavior, and performance within an environmental context.</p> <p>Research presented in this thesis addresses both scientific and engineering gaps through the development of a simple, yet robust aerosol-based synthesis approach and demonstrations of …
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Studies of Molecular and Colloidal Semiconductors and Their Mass Transport Properties by Voltammetry, Stochastic Electrochemistry, and Electrogenerated Chemiluminescence
… photoelectrochemical current (PEC) measurements, colloidal behavior of TiO2 NPs has been studied using dynamic light scattering (DLS) technique. Combining PEC measurements with DLS analysis of colloidal semiconductors provides a precise correlation of nanostructure-function of NPs which is the key …
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On the dynamics and interparticle forces of electrostatically stabilized colloidal suspensions
… the equilibrium and dynamic properties of colloidal suspensions play a pivotal role, with systems ranging from simple gold nanoparticles in electrolyte solutions to complex assemblies like micelles, vesicles, nanocapsules, and dendritic polymers. Typically, these systems are approached …