Keywords

Hollow nanostrucutres, plasmonic properties, silver-gold nanocages, thermal stability, lateral flow assay, multiplexed detection

Abstract

Plasmonic nanoparticles have garnered significant attention for their potential applications in various fields such as sensing, imaging, biomedicine, and catalysis owing to their unique ability to manipulate light at the nanoscale. Among the diverse arrays of plasmonic nanostructures, hollow nanoparticles present distinct advantages attributed to their highly open structure, large surface-to-volume ratio, and superior physicochemical properties. In this thesis, we investigated the impact of internal structure on the plasmonic properties of hollow nanoparticles. We first introduced the fabrication techniques to prepare hollow nanostructures with desired internal characteristics. We subsequently provided a brief discussion on the effect of these internal structural parameters, including hollow shape, elemental compositions, wall thickness, void size, and inner shells, on the plasmonic properties of the hollow nanoparticles. Next, we present a systematic understanding of the impact of wall thickness on the plasmonic properties of silver-gold nanocages. Furthermore, we conducted thermal stability tests in both solution- and solid phases for these silver-gold nanocages with different wall thickness, where cages with thicker walls exhibited better thermal stabilities compared to those with thinner walls. Finally, we demonstrated a multiplexed colorimetric lateral flow assay (MCLFA) system by using two Ag@Ag-Au nanoshells of distinct colors as labels. We believe that the findings on silver-gold hollow nanostructures can provide insights into the design and optimization of hollow nanoparticles with finely tuned internal structures, thus paving the way for the development of novel nanophotonic devices with enhanced performance and functionality.

Completion Date

2024

Semester

Spring

Committee Chair

Xia, Xiaohu

Degree

Doctor of Philosophy (Ph.D.)

College

College of Sciences

Department

Chemistry

Degree Program

Chemistry

Format

application/pdf

Language

English

Rights

In copyright

Release Date

November 2029

Length of Campus-only Access

5 years

Access Status

Doctoral Dissertation (Campus-only Access)

Campus Location

UCF Downtown

Accessibility Status

Meets minimum standards for ETDs/HUTs

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Restricted to the UCF community until November 2029; it will then be open access.

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