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Hybridization of surface plasmon resonance in immiscible solid composite nanostructures

Johnson, Joel (2018) Hybridization of surface plasmon resonance in immiscible solid composite nanostructures. Masters thesis, Northern Arizona University.

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Advances in nanofabrication methods allow for the creation of more complex nanostructures that can solve more complex problems across many fields. Complexity in the morphology and composition of nanostructures has been hotly researched recently to achieve tunable and multifunctional structures for various applications, most notably within the biomedical field. While composite nanostructures have received a heavy amount of attention, immiscible solid composite nanostructures have not been studied or demonstrated by physical vapor deposition fabrication. It is expected that these nanostructures, which are themselves made up of smaller nanoparticles, will provide a higher level of complexity and functionality for many applications. This study uses dual source physical vapor depositional techniques to fabricate immiscible solid composite nanostructures made of gold-silica and gold-titanium dioxide combinations. An array of gold-silica ratio thin film samples was fabricated and characterized with atomic force microscopy and ultraviolet to visible range spectroscopy. Atomic force microscopy was used to verify the expected morphology and composition and spectroscopy was used to characterize the absorption properties. It was found that the peak absorption wavelength was shifted based on the compositional ratio of gold to silica within the nanostructures. Thus, a hybridization of optical properties is exhibited consistent with the compositional ratio of gold and silica within the immiscible solid composite nanostructures. This study lays the groundwork for property tunability through adjustment of the compositional ratio of immiscible solid nanostructures.

Item Type: Thesis (Masters)
Publisher’s Statement: © Copyright is held by the author. Digital access to this material is made possible by the Cline Library, Northern Arizona University. Further transmission, reproduction or presentation of protected items is prohibited except with permission of the author.
Keywords: Immiscible Solid; Localized Surface Plasmon Resonance; Nanohelices; Nanorods; Thin Film
Subjects: Q Science > QC Physics
NAU Depositing Author Academic Status: Student
Department/Unit: Graduate College > Theses and Dissertations
College of the Environment, Forestry, and Natural Sciences > Physics and Astronomy
Date Deposited: 05 May 2021 19:50
URI: http://openknowledge.nau.edu/id/eprint/5442

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