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 49 for “"nanosphere"”.
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The plasmonics of a nanosphere on a mirror substrate
The aim of this thesis is to systematically investigate the physics of coupling a spherical gold nanoparticle on a mirrored (NPoM) substrate. When this occurs, both the localised surface plasmons on the particle and propagating surface plasmons at both of the interfaces of the substrate can be …
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A study toward large-area low-defect nanosphere lithography
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms
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Synthesis, Characterization, and Evaluation of Silica-Nanosphere-Based Contrast Agents for Biomedical Application
… were ultimately introduced into the silica nanospheres for dual functionality. Gd-DTPA, a commonly used MRI contrast agent, was chosen as an appropriate candidate for initial study. Through an in vivo experiment using tadpoles, we demonstrated and evaluated dual functionality of Gd-DTPA …
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Characterizing Engineered Nanomaterials: From Environmental, Health and Safety Research to the Development of Shaped Nanosphere Lithography for Metamaterials
… those described as metamaterials. A new shaped nanosphere lithography approach was used to manipulate the form of silica nanospheres packed onto a surface; the resulting array of mushroom structures provided a mask that after gold evaporation and etching left either golden rings or crescents …
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Surface plasmon resonance study of the purple gold (AuAl₂) intermetallic, pH-responsive fluorescence gold nanoparticles, and gold nanosphere assembly
… nanoparticles, in particular, dimers of gold nanospheres (NSs). 16 nm and 60 nm diameter NSs were connected using photocleavable molecules as linkers. I showed that the orientation of the dimers can be controlled with the polarization of UV illumination that cleaves the linkers, making dipolar …
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Nanomanipulation modeling and simulation
… approach to better model nanomanipulation of a nanosphere lying on a stage via a pushing scheme is presented. Besides its amenability to nonlinear analysis and simulation, the proposed model is also effective in reproducing experimental behavior commonly observed during AFM-type …
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Implementation Plan to Integrate the Nanosphere Verigene Assay in a High-volume Reference Laboratory and the Anticipated Workflow Benefits to Adopting Rapid Blood Culture Testing
… rapid blood culture testing system (Nanosphere, Northbrook, IL, USA) into the blood culture workflow at a high-volume reference laboratory.</p>
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Unlocking single molecule detection sensitivities in surface-enhanced Raman spectroscopy
… that combines parallel fabrication techniques of nanosphere lithography and Langmuir- Blodgett assembly with the ability to tune interparticle gaps on stretchable polydimethylsiloxane substrates to fabricate sub-5nm gap bowtie arrays. Toward that end, centimeter-scale nanosphere assembly with …
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Fabrication of Three-Dimensionally Ordered Nanostructured Materials Through Colloidal Crystal Templating
… (3D) close-packed arrays of silica nanospheres) and their replicas are used as templates in the fabrication of new nanostructured materials. 3D ordered nanomeshes and nanosphere arrays are readily obtained by chemical and/or electrochemical methods. Using silica opal templates, …
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Nanolithographically defined semiconductor quantum dots
… grown quantum wells (QWs) using a top-down nanosphere lithography, dry-etch and overgrowth fabrication process. Devices are characterized by a current density-voltage (JV) test, electroluminescence (EL) and photoluminescence (PL) spectroscopy. The quantum confi nement is simulated by COMSOL.
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DEVELOPMENT AND KINETIC MODELING OF MULTIPLEX MICROSPHERE ASSAYS FOR HIGH-THROUGHPUT DISCOVERY OF PROTEASE ACTIVE SMALL MOLECULE COMPOUNDS
… associated with streptavidin-coated microspheres/nanospheres. We have developed microsphere-based platforms to detect the cleavage activities of several proteases simultaneously. In addition, we have performed high-throughput screening (HTS) to identify potential inhibitors for the Bacillus …
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The fabrication of biodegradable nanospheres from novel hydroxalkanoates for the delivery of actives of pharmaceutical and agricultural interest
This work describes the fabrication of nanospheres from a range of novel polyhydroxyalkanoates supplied by Monsanto, St Louis, Missouri, USA for the delivery of selected actives of both pharmaceutical and agricultural interest. Initial evaluation of established microsphere and nanosphere …
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Sensing Applications of Silver and Gold Nanoparticles
… also show the calculation results of LSPRs of Au nanosphere suspensions using Mie theory. The measured extinction spectra of Au nanosphere suspensions agree with the calculated results very well. Chapter 2 is a chapter describing the chemical synthesis of a variety of NPs, such as Ag prisms and …
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Investigating the impact of gold nanoparticles on pulmonary cells: From 2D to 3D culture systems
… These include seed-mediated growth of gold nanospheres and nanorods and the control over absolute dimensions of gold nanoparticles. Then the surface modification of gold nanoparticles, including thiol functionalization, and layer-by-layer polyelectrolyte and mesoporous silica coatings are …
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Self-organization on Nanoparticle Surfaces for Plasmonic and Nonlinear Optical Applications
… I combined silver nanoparticles fabricated by nanosphere lithography with ionic self-assembled multilayer (ISAM) films, tuning the geometry of the particles to make their plasmonic resonances overlap with the frequency of optical excitation. The designed hybrid metallic/organic nanostructures …
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Metal-assisted chemical etching of 4H silicon carbide
… on 4H-SiC. Both photolithography and nanosphere lithography are used to pattern the substrate, being compared in etch quality and characteristics. Control of porosity and etch rate are presented, with a mechanism analysis provided to complement the explanations in the literature.
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Nanolaminate coatings to improve long-term stability of plasmonic structures in physiological environments
… Thermal Annealing. An alternate approach using Nanosphere Lithography (NSL) was also investigated. Films were examined using ellipsometry, atomic force microscopy and transmission measurements. Accelerated in-situ tests of Hafnium Oxide/Aluminum Oxide nanolaminate shells in a mildly pH …
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Transformations in inorganic nanomaterials: role of defects, surfaces, and size
… assemblies of hexagonal Au nanoplates and Au nanospheres affects their localized surface plasmon resonance properties. . We find using electrodynamic simulations combined with correlated electron microscopy/optical spectroscopy at the single-construct level that the nature and strength of …
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Synthesis and Characterization of Nanostructures in Porous Anodic Aluminum Oxide Templates
… of nanowires, lithography techniques including nanosphere lithography and e-beam lithography were used. Nanosphere lithography used self-assembled PS spheres as a mask creates holes between spheres and the size of the holes is determined by the size and geometry of ordered PS spheres on the …
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