Document Type

Thesis

Date of Award

2022

Degree Name

Master of Science (MS)

Department

Chemistry

First Advisor

James JH Hoefelmeyer

Abstract

The capacity to develop and expand the utility of a single nanostructure is one of the major issues in the field of hybrid nanocrystals. Major advancements in the fabrication of materials with multiple functionalities by combining many materials into a single nanoparticle entity are intriguing, but they still pose obstacles that must be addressed. This trend has been spurred by significant progressions in the wet-chemical synthesis of durable and easily programmable nanocrystals with various morphologies. The extent of the structural complexity of solution-based nanocrystals looks to be one of the inevitable avenues along which nanoscience will increasingly focus. We have sought different synthetic methods to synthesize α-NaYF4-TiO2 hybrid nanocrystals based on the hypothesis that the tips of nanorods have higher reactivity which will facilitate the nucleation of α-NaYF4 nanocrystals on those sites. The nucleation of TiO2 in presence of α-NaYF4 nanocrystals produces nanocrystals with varying morphology including large low aspect ratio nanorods, and smaller rod-shaped, branched, and diamond-shaped nanocrystals. Also, the solid-state reaction between α-NaYF4 nanocrystals and TiO2 nanorods reveals the formation of hollow α-NaYF4 nanocrystals. Transmission electron microscopy, powder x-ray diffractometer, scanning electron microscopy, and energy-dispersive spectroscopy have been used to characterize these materials.

Subject Categories

Chemistry

Keywords

TiO2-NaYF4 HYBRID, NANOCRYSTALS

Number of Pages

67

Publisher

University of South Dakota

Included in

Chemistry Commons

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